2003 Subaru Forester Ignition and Tune-Up Products
Find Your Specific 2003 Subaru Forester Ignition and Tune-Up Products
Below you will find various in-demand Subaru Ignition and Tune-Up Products, components and accessories for your 2003 Forester. Advance Auto Parts has popular Forester parts like Ignition Boots, Ignition Coils and Boots, Spark Plugs and more. You’ll also find aftermarket and OEM Ignition and Tune-Up Products for other Forester model years including
2015,
2016,
2017,
2018,
2019,
2020,
2021,
2022,
2023 and more. Select a category of 2003 Subaru Forester Ignition and Tune-Up Products below and start saving instantly.
Popular 2003 Subaru Forester Ignition and Tune-Up Products Categories
Essential Ignition and Tune-Up Products for 2003 Subaru Foresters
NGK – NGK Premium DIS Type Ignition Coil: Meets or Exceeds OE Specifications, 48981 (Part No.48981)
from
$187.99
NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 years’ experience and are driven by extreme dedication to innovation, performance and quality. With state-of-the-art manufacturing, inventory and distribution facilities in North America and globally, NGK is dedicated to providing customers with world-class products and services. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK’s coil designs will outperform all others – far beyond operational environments a vehicle would actually experience. NGK ignition coils have vast coverage including late-model domestic and import vehicles. NGK’s OE legacy, unsurpassed quality and leading vehicles in operation coverage reinforces NGK as The Ignition Specialist.
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NGK – NGK Premium DIS Type Ignition Coil: Meets or Exceeds OE Specifications, 48744 (Part No.48744)
from
$127.99
NGK ignition coils are manufactured to meet or exceed OE standards for the highest durability and operational performance, so they can be installed with confidence. NGK and their family of automotive products have over 80 years’ experience and are driven by extreme dedication to innovation, performance and quality. With state-of-the-art manufacturing, inventory and distribution facilities in North America and globally, NGK is dedicated to providing customers with world-class products and services. Developed and rigorously tested in our ISO 17025 accredited test lab under the most extreme conditions, NGK’s coil designs will outperform all others – far beyond operational environments a vehicle would actually experience. NGK ignition coils have vast coverage including late-model domestic and import vehicles. NGK’s OE legacy, unsurpassed quality and leading vehicles in operation coverage reinforces NGK as The Ignition Specialist.
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Delphi – Delphi Ignition Coil, GN10220 (Part No.GN10220)
from
$181.99
Every single Delphi ignition coil is designed and endurance tested using high quality materials. This ensures fast starts, consistent engine performance and optimized fuel efficiency. We makes more than 10 million ignition coils for North America each year, and each one is engineered to OE design specifications for vehicles from Ford, Toyota, Nissan, Lexus, GM, Mazda, Chrysler, Subaru, Acura and more.
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DENSO – DENSO Original Equipment Quality Direct Ignition Coil, 673-0201 (Part No.673-0201)
from
$109.99
As the innovator and leader in stick coil technology DENSO has conducted superior testing and inspection processes to insure the highest quality ignition coil. Don’t be fooled by imitations – look for the DENSO name to be sure you’re getting the best.
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NGK – NGK Laser Platinum Spark Plug (FR5AP-11): Fine Wire Tip for Precision, 5463 (Part No.5463)
from
$18.99
NGK Laser Platinum spark plugs provide high ignitability and longer service life compared to conventional nickel spark plugs. Laser Platinum plugs are tested to the highest standards to ensure quality and durability. Engineered specifically for OE applications. Laser platinum plugs provide stable idling, superior anti-fouling, improved fuel efficiency and lower emissions. High-grade pure alumina ceramic and 98% pure copper core prevents spark plug from overheating and provides reliable starts. Most Laser Platinum spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.
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Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Reliable Performance, 3923 (Part No.3923)
from
$4.49
Autolite Copper spark plugs are designed to provide reliable performance and quick starts, making them an essential choice for maintaining your vehicle’s efficiency. Featuring a copper core center electrode, these spark plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are engineered for extended life, while the high alumina multi-rib ceramic insulator enhances thermal conductivity and insulation strength. With a nickel-plated shell, these plugs resist corrosion, offering durability for long-term use. The mid-projection standard center electrode design, combined with nickel tip materials, ensures optimal spark delivery. Designed with a gasket seat type and equipped with a resistor, these spark plugs meet regular-grade specifications, making them a dependable option for a wide range of applications.
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Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 3924 (Part No.3924)
from
$5.49
Autolite Copper spark plugs are crafted to ensure reliable performance and durability for your vehicle or application. Featuring a copper core center electrode, these spark plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are designed for extended life, while the mid-projection center electrode enhances ignition efficiency. Built with a high alumina multi-rib ceramic insulator, these plugs offer superior thermal conductivity and insulation, boosting strength and reliability. The nickel-plated shell provides exceptional corrosion resistance, making them ideal for long-term use. With a flat seat type and integrated resistor, these spark plugs deliver quick starts and meet performance expectations, offering great value for regular-grade applications.
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DENSO – DENSO Iridium Long-Life Spark Plug: Super Ignition, OE Performance, FXE22HR11, 3442 (Part No.3442)
from
$28.49
Manufactured to the strictest OE performance, durability and emissions standards.
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Autolite – Autolite Racing Resistor Spark Plug: Enhanced Heat Transfer for Peak Performance, AR3924 (Part No.AR3924)
from
$5.99
The Racing Resistor Spark Plug is expertly crafted to deliver peak performance on the track, featuring a cut-back ground electrode for optimal ignitability and enhanced heat transfer, ensuring quicker starts and maximum engine efficiency. Its yttrium-enhanced alloy reduces ground wire temperature by up to 8%, making it ideal for colder heat ranges and performance modifications under intense conditions. The anti-corrosive nickel plating resists rust better than black oxide, maintaining durability and long-term reliability. Designed with a high alumina multi-rib ceramic insulator, it offers superior thermal conductivity and insulation, preventing flash-over while increasing strength. With a mid-projection center electrode and nickel-tipped materials for both the center and ground electrodes, this performance-grade spark plug is built to handle demanding environments. The flat seat design and integrated resistor further enhance its functionality, making it a dependable choice for racers seeking consistent ignition and durability.
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Autolite – Autolite Racing Resistor Spark Plug: Enhanced Heat Transfer for Peak Performance, AR3923 (Part No.AR3923)
from
$5.99
The Racing Resistor Spark Plug is expertly crafted to deliver peak performance on the track, featuring a cut-back ground electrode for optimal ignitability and superior heat transfer, ensuring quicker starts and maximum engine efficiency. Its yttrium-enhanced alloy reduces ground wire temperature by up to 8%, making it ideal for colder heat ranges and performance modifications under intense conditions. The anti-corrosive nickel plating resists rust better than black oxide, maintaining durability and long-term efficiency. Designed with a high alumina multi-rib ceramic insulator, it offers exceptional thermal conductivity and insulation, preventing flash-over while enhancing strength. With a mid-projection center electrode and nickel-tipped components, this performance-grade spark plug is built to handle the demands of racing environments, delivering reliability and value for enthusiasts seeking top-tier engine performance.
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Carquest Premium – Carquest Spark Plug Wire Set: 4 Wires, Increased performance, Designed for direct fit, 35-4279 (Part No.35-4279)
from
$36.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
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Carquest Premium – Carquest Knock Sensor, SBC3818 (Part No.SBC3818)
from
$76.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, EKA1047 (Part No.EKA1047)
from
$157.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Dorman – Dorman Engine Knock Sensor And Harness Kit, 962-701 (Part No.962-701)
from
$63.99
Check engine light on and vehicle running rough. Could be a failed knock sensor. This ignition knock sensor kit combines both necessary sensors and the wiring harness that joins them for a complete repair in one package.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBC3742 (Part No.SBC3742)
from
$103.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Knock Sensor, SBC3964 (Part No.SBC3964)
from
$92.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Knock Sensor, EKC1038 (Part No.EKC1038)
from
$157.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA3677 (Part No.SBA3677)
from
$49.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA5406 (Part No.SBA5406)
from
$314.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Sylvania – Sylvania 2721 Long Life: Mini Bulb, Standard Performance, 2 Pack, 2721LLBP2 (Part No.2721LLBP2)
from
$8.99
SYLVANIA Long Life miniature bulbs provide standard performance for your car or truck’s interior and exterior auxiliary lighting. Ideal for use in your car’s back up/reverse, trunk, dome lights and more, Long Life bulbs are a direct replacement for your vehicle. Designed for durability, lower maintenance, and safety in mind.
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Sylvania – Sylvania 168 SilverStar: Mini Bulb, High Performance, 2 Pack, 168STBP2 (Part No.168STBP2)
from
$13.99
The SYLVANIA SilverStar high performance miniature bulbs deliver a brighter, whiter light when compared to SYLVANIA Long Life. SYLVANIA achieves this using a specially designed filament, propriety gas mixture and a lamp coating that shifts the color temperature towards a whiter light. A brighter light can improve visibility in your interior lighting applications and increase your visibility to other drivers when braking or turning.
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Sylvania – Sylvania 158 Long Life: Mini Bulb, Standard Performance, 2 Pack, 158LLBP2 (Part No.158LLBP2)
from
$8.99
SYLVANIA Long Life miniature bulbs provide standard performance for your car or truck’s interior and exterior auxiliary lighting. Ideal for use in your car’s back up/reverse, trunk, dome lights and more, Long Life bulbs are a direct replacement for your vehicle. Designed for durability, lower maintenance, and safety in mind.
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Upgrade your 2003 Subaru Forester with Top-Quality Ignition and Tune-Up Products
When it comes to maintaining or upgrading your 2003 Subaru Forester, nothing is more important than using high-quality OEM or aftermarket parts that you can trust. Whether you’re repairing damage to your Subaru or enhancing its overall performance, Ignition and Tune-Up Products are key to keeping your Forester functioning at its best. At Advance Auto Parts, we offer a wide selection of 36 Ignition and Tune-Up Products for the 2003 Subaru Forester, designed to meet your needs without breaking the bank.
From
Ignition Boot
replacements to
Ignition Coils and Boots
upgrades, we’ve got you covered with parts that fit your vehicle perfectly and ensure long-lasting performance.
Affordable Prices and Wide Selection
Shopping for Ignition and Tune-Up Products for any vehicle can be a hassle, especially if you’re on a budget. But with Advance Auto Parts, you can find high-quality Ignition and Tune-Up Products for your 2003 Subaru Forester at great prices.
Our Ignition and Tune-Up Products inventory for this model
ranges from just $3.99 to $181.99, with
an average price of $23.48.
Our 36 Ignition and Tune-Up Products in stock come from 9 trusted brands, so you’re sure to find the right part for your 2003 Subaru Forester without overspending.
Top Brands and High Customer Satisfaction
Advance Auto Parts takes pride in offering only the best brands in the automotive industry. For your 2003 Subaru Forester, we stock popular OEM and aftermarket Ignition and Tune-Up Products from top names
like NGK, Champion, DENSO, and more.
NGK Ignition and Tune-Up Products
start at just $7.49 and boast an impressive 4.8 stars average rating from customers.
Champion and DENSO also bring quality to the table, with Ignition and Tune-Up Products available starting at $4.79, and at an average 4.8 stars rating.
With 3,122 customer reviews and counting, our 2003 Subaru Forester Ignition and Tune-Up Products have a strong track record of reliability, ensuring you can trust your purchase.
Explore Related Parts and More
While you’re here, don’t forget to check out other essential categories that go hand in hand with Ignition and Tune-Up Product upgrades. Explore related part types like Batteries and Chargers, Oil and Lubricants
and more to make sure your 2003 Subaru Forester is always ready to roll. We’re committed to providing you with everything you need to keep your Forester in top shape, all in one place.
Start shopping confidently below for your 2003 Subaru Forester!
Best-Selling Ignition Boots for 2003 Subaru Foresters
Enhance the driving experience in your Subaru with 1 quality Ignition Boot components, starting at $36.99.
Carquest Premium – Carquest Spark Plug Wire Set: 4 Wires, Increased performance, Designed for direct fit, 35-4279 (Part No.35-4279)
from
$36.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
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Most Popular 2003 Subaru Forester Ignition Coils and Boots
Customize your Subaru with 2 Ignition Coils and Boots products
like Ignition Coils, all
priced under $181.99.
Carquest Premium – Carquest Ignition Coil: Meets or Exceeds OE Specifications, 1 Count, EBE1719 (Part No.EBE1719)
from
$112.99
Carquest Premium ignition coils meet or exceed original equipment (OE) specifications and are developed by top OE/OES manufacturers to ensure superior performance. All of our Carquest Premium ignition coils are developed by IATF 16949 certified manufacturers for consistent durability and long-lasting performance. These ignition coils use high-quality components and will utilize optimized designs on applications where the OE ignition coil had frequent failures. We require stringent testing standards to ensure proper fit and performance for each application and stand behind our Carquest Premium ignition coils with an industry-leading warranty (limited). Carquest Premium ignition coils are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Delphi – Delphi Ignition Coil, GN10220 (Part No.GN10220)
from
$181.99
Every single Delphi ignition coil is designed and endurance tested using high quality materials. This ensures fast starts, consistent engine performance and optimized fuel efficiency. We makes more than 10 million ignition coils for North America each year, and each one is engineered to OE design specifications for vehicles from Ford, Toyota, Nissan, Lexus, GM, Mazda, Chrysler, Subaru, Acura and more.
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Top Picks for 2003 Subaru Forester Spark Plugs
Upgrade Subaru Foresters with top-quality Spark Plugs parts, including 29 OEM and aftermarket selections for your 2003 model.
NGK – NGK G-Power Platinum Spark Plug (BKR6EGP): Enhanced Durability & Efficiency, 7092 (Part No.7092)
from
$8.99
NGK G-Power Platinum spark plugs are the best single platinum spark plugs at an economical price. G-Power plugs feature a fine wire platinum center electrode and a trapezoidal cut ground electrode that offers increased durability, improved fuel efficiency, lower emissions, faster starts and quicker acceleration over conventional nickel spark plugs. An excellent upgrade for vehicles which used nickel alloy spark plugs originally. For better performance consider upgrading to a NGK Iridium IX plug. For even greater performance consider upgrading to a NGK RUTHENIUM HX plug.
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NGK – NGK Iridium IX Spark Plug (BKR6EIX-11): Enhanced Ignitability & Durability, 3764 (Part No.3764)
from
$15.99
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode’s durability is six times harder than platinum. Iridium alloy’s extremely high melting point is perfect for today’s engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.
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NGK – NGK V-Power Nickel Spark Plug (BKR6E-11): Reliable Ignitability & Performance, 2756 (Part No.2756)
from
$7.49
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK’s V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK’s legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
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NGK – NGK Standard Nickel Spark Plug (BKR6ES-11): Reliable OE Performance, 5553 (Part No.5553)
from
$6.99
NGK Standard spark plugs (in the iconic NGK ‘yellow box’ packaging) are a proven OE cornerstone and technology customers have relied on for decades. Engineered specifically for OE applications, NGK Standard spark plugs provide OE quality nickel alloy reliable performance and design. NGK’s legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance, while triple gasket sealing prevents combustion gas leakage. Solid 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
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DENSO – DENSO Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IK20, 5304 (Part No.5304)
Autolite – Autolite Racing Resistor Spark Plug: Enhanced Heat Transfer for Peak Performance, AR3923 (Part No.AR3923)
from
$5.99
The Racing Resistor Spark Plug is expertly crafted to deliver peak performance on the track, featuring a cut-back ground electrode for optimal ignitability and superior heat transfer, ensuring quicker starts and maximum engine efficiency. Its yttrium-enhanced alloy reduces ground wire temperature by up to 8%, making it ideal for colder heat ranges and performance modifications under intense conditions. The anti-corrosive nickel plating resists rust better than black oxide, maintaining durability and long-term efficiency. Designed with a high alumina multi-rib ceramic insulator, it offers exceptional thermal conductivity and insulation, preventing flash-over while enhancing strength. With a mid-projection center electrode and nickel-tipped components, this performance-grade spark plug is built to handle the demands of racing environments, delivering reliability and value for enthusiasts seeking top-tier engine performance.
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Champion – Champion Platinum Power Spark Plug RC12PYC – Powerful Performance & Longevity, 3071 (Part No.3071)
from
$5.99
Champion Platinum Power spark plugs deliver powerful performance with the exclusive Premium alloy that reaches and sustains the correct operating temperature. A fine-wire center electrode and V-trimmed ground electrode provides sharp spark focus and reliable ignition for consistent combustion under demanding conditions. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
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DENSO – DENSO Double Platinum Spark Plug: OE Performance, lasts 60K+ Miles, PK20PR11, 3168 (Part No.3168)
from
$14.49
Double Platinum Spark Plug (PK20PR11) is engineered to meet the highest OE standards for performance, durability, and emissions compliance. Featuring OE-grade platinum on both the center and ground electrodes, this spark plug ensures sustained spark performance for over 60,000 miles, delivering reliable ignition efficiency and reduced secondary required voltage. Its premium shell construction with machine-rolled threads enhances durability and ensures a secure fit, while superior thermal conductivity optimizes heat dissipation for consistent operation. Designed with a flat seat type and platinum center electrode tip material, this spark plug offers exceptional longevity and reduced maintenance needs, making it a trusted choice for satisfied customers and minimizing shop comebacks. Perfect for those seeking a high-quality solution that combines advanced technology with long-lasting performance.
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NGK – NGK Laser Iridium Spark Plug (IFR6E11): Fine Wire Tip for Precision, 6741 (Part No.6741)
from
$22.99
NGK Laser Iridium spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium spark plugs are tested to the highest standards to ensure quality and durability. Iridium tipped center electrode provides durability six times harder than platinum. NGKs high grade pure alumina ceramic and 98 percent pure copper core prevents the spark plug from overheating while providing reliable starts. Most Laser Iridium spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.
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DENSO – DENSO U-Groove Spark Plug: OE Performance, K20PR-U11, 3121 (Part No.3121)
from
$4.99
The U-Groove Spark Plug features a patented U-groove ground electrode design that enhances ignitability, allowing it to fire leaner fuel mixtures for improved engine efficiency. Built with a nickel center electrode tip and a flat seat type, this spark plug ensures reliable performance and compatibility with a wide range of vehicles, including classic and collector cars. Its precision machine-rolled threads minimize the risk of seizing or cross-threading in delicate aluminum heads, making installation smoother and safer. Designed to last twice as long as most conventional plugs, it offers exceptional durability and value. Each plug is 100% pre-fired to guarantee dependable operation, making it a trusted choice for maintaining OE performance. Whether you’re seeking efficiency or longevity, this U-Groove spark plug delivers both.
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DENSO – DENSO Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, IK20TT, 4702 (Part No.4702)
from
$14.99
Durability of an OE style plug combined with Power & Torque of high performance.
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Autolite Iridium – Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP3923 (Part No.XP3923)
from
$11.49
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, the Autolite Iridium XP spark plugs feature an iridium-enhanced 0.6mm finewire design and patented platinum sidewire technology to provide better overall durability and a more focused ignition for enhanced ignitability and performance. Features double Iridium-enhanced alloy technology center electrode for improved durability and wear resistance.
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Autolite – Autolite Platinum Spark Plug: Enhanced Durability & Improved Performance, AP3923 (Part No.AP3923)
from
$5.49
Autolite Platinum spark plugs are crafted for superior performance and durability, making them ideal for older engine applications. Featuring a platinum center electrode firing tip, these spark plugs ensure quicker firing, smoother starts, and enhanced acceleration while boosting fuel efficiency. The platinum firing tip resists gap erosion, extending service life, while the high alumina ceramic insulator offers excellent thermal conductivity and insulation for added strength. A multi-rib insulator prevents flash-over, and the nickel-plated shell resists corrosion for long-lasting reliability. Designed with a flat gasket seat type, these spark plugs provide a secure seal for optimal engine performance. With a mid-projection standard center electrode and nickel ground electrode tip, they deliver consistent performance for demanding conditions. Perfect for performance-grade applications, these spark plugs combine advanced materials and engineering to ensure your engine runs smoothly and efficiently.
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Champion – Champion Copper Plus Spark Plug RC12YC – Dependable Performance & Durability, 71-1 (Part No.71-1)
from
$4.79
Champion Copper Plus spark plugs deliver dependable ignition performance with proven copper-core technology. The copper core electrode provides excellent conductivity and optimized heat control for consistent sparks while the coated shell protects against corrosion. Champion your engine with spark plugs engineered to improve efficiency and keep your vehicle running at its best.
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Champion – Champion Copper Plus RC12YC RC12YC – Dependable Performance & Durability, 71 (Part No.71)
from
$6.99
This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for reliable performance. The Copper Plus design ensures dependable performance and durability, while the copper core center electrode allows for accurate control of heat range, extending the spark plug’s life. Built to ISO and SAE Standards, it offers superior corrosion resistance and proven performance. The nickel copper alloy center electrode tip and flat seat type further enhance its reliability, making it a top choice for consistent engine performance.
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Autolite – Autolite Copper Resistor Spark Plug: Quick Starts & Reliable Performance, 3923 (Part No.3923)
from
$4.49
Autolite Copper spark plugs are designed to provide reliable performance and quick starts, making them an essential choice for maintaining your vehicle’s efficiency. Featuring a copper core center electrode, these spark plugs excel in thermal control and resist fouling, ensuring consistent operation. The high nickel alloy center and ground electrodes are engineered for extended life, while the high alumina multi-rib ceramic insulator enhances thermal conductivity and insulation strength. With a nickel-plated shell, these plugs resist corrosion, offering durability for long-term use. The mid-projection standard center electrode design, combined with nickel tip materials, ensures optimal spark delivery. Designed with a gasket seat type and equipped with a resistor, these spark plugs meet regular-grade specifications, making them a dependable option for a wide range of applications.
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Autolite – Autolite Double Platinum Spark Plug: Enhanced Durability & Performance, APP3923 (Part No.APP3923)
from
$7.49
Autolite Double Platinum spark plugs are engineered for exceptional durability and performance, making them an ideal choice for distributor-less ignition system (DIS) engines. Featuring a platinum-to-platinum design, these spark plugs effectively prevent gap erosion, reduce misfires, and extend service life. The yttrium-enhanced ground electrode ensures superior heat transfer, allowing the plugs to withstand high temperatures and pressures for greater longevity. A high alumina ceramic insulator provides optimal thermal conductivity and dielectric strength, while the multi-rib insulator design prevents flash-over for reliable operation. With a mid-projection center electrode and platinum tips on both the center and ground electrodes, these plugs deliver consistent performance and efficiency. Backed by over a century of engineering expertise and a legacy of over 11 billion plugs sold, Autolite guarantees proven quality and reliability. Designed for performance-grade applications, these spark plugs are a smart upgrade over copper and standard platinum options, ensuring your engine runs smoothly and efficiently.
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E3 – E3 DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency, E3.56 (Part No.E3.56)
from
$8.49
“The Premium DiamondFire Automotive Spark Plug is engineered to deliver peak performance and efficiency for your vehicle. Featuring E3’s patented Diamond Fire edge-to-edge ground electrode, it ensures a faster, more complete burn for smoother acceleration and idle. The innovative “”diamond-shaped”” side wire electrode enhances combustion by igniting the air/fuel mixture more quickly, resulting in a larger flame kernel and improved power output – up to 6% on average. Designed with nickel center and ground electrode tips, this spark plug offers durability and consistent performance. Its cleaner-burning combustion reduces engine carbon deposits and promotes fuel savings, making it an eco-friendly choice. Pre-gapped at the factory for hassle-free installation, this spark plug is a perfect blend of advanced technology and convenience, ensuring your engine runs at its best.”
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ACDelco – ACDelco RAPIDFIRE Spark Plug, 5 (Part No.5)
from
$7.99
ACDelco Gold (Professional) RAPIDFIRE Spark Plugs are a high quality alternative to Original Equipment (OE) parts. These RAPIDFIRE Single Platinum Performance Spark Plugs are designed for everyday use and are a high quality replacement for many vehicles on the road today. These premium aftermarket spark plugs have high-quality suppressors that help prevent misfiring, an improved plug to boot seal, and a pure copper core for greater durability. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.
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ACDelco – ACDelco Double Platinum Spark Plug, 41-800 (Part No.41-800)
from
$11.49
ACDelco GM Original Equipment Double Platinum Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. ACDelco GM Original Equipment parts are the true OE parts installed during the production or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.
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DENSO – DENSO Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition, 4504 (Part No.4504)
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$3.99
The Platinum TT Spark Plug with its advanced twin-tip design ensures faster flame propagation for more complete combustion, enhancing ignition performance and efficiency. Featuring a platinum center electrode, it delivers excellent conductivity and durability, while the titanium-enhanced ground strap ensures superior performance and extended lifespan. The flat seat type provides a secure fit, making it compatible with a variety of vehicles. Designed for reliability and longevity, this spark plug is a dependable choice for maintaining consistent engine performance. Its high-quality materials and innovative design make it a valuable addition to your vehicle’s ignition system.
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E3 – E3 DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency, E3.64 (Part No.E3.64)
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$8.49
“The Premium DiamondFire Automotive Spark Plug is engineered to deliver peak performance and efficiency for your vehicle. Featuring E3’s patented Diamond Fire edge-to-edge ground electrode, it ensures a faster, more complete burn for smoother acceleration and idle. The innovative “”diamond-shaped”” side wire electrode enhances combustion by quickly igniting the air/fuel mixture, resulting in a larger and faster flame kernel. This translates to improved power output by up to 6% on average and significant fuel savings, while also reducing engine carbon deposits for a cleaner burn. Constructed with durable nickel for both the center and ground electrode tips, this spark plug is built to last. Its gasket seat type ensures a secure fit, and the pre-gapped design eliminates the need for adjustments, making installation hassle-free. Upgrade to this advanced spark plug for enhanced engine performance, better fuel efficiency, and a cleaner, more reliable ride.”
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NGK – NGK Laser Platinum Spark Plug (PFR6G-11): Superior Ignitability & Longevity, 5555 (Part No.5555)
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$23.99
NGK Laser Platinum spark plugs provide high ignitability and longer service life compared to conventional nickel spark plugs. Laser Platinum plugs are tested to the highest standards to ensure quality and durability. Engineered specifically for OE applications. Laser platinum plugs provide stable idling, superior anti-fouling, improved fuel efficiency and lower emissions. High-grade pure alumina ceramic and 98% pure copper core prevents spark plug from overheating and provides reliable starts. Most Laser Platinum spark plugs feature a platinum pad on the ground electrode for even wear in distributorless ignition systems.
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ACDelco – ACDelco Conventional Spark Plug, 41-602 (Part No.41-602)
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$6.49
ACDelco GM Original Equipment Conventional Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco GM Original Equipment parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional.
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In-Demand Ignition Sensors for 2003 Subaru Foresters
Select from 2 premium Ignition Sensors parts for your 2003 Subaru Forester, with prices ranging from $83.99 to $95.99.
Carquest Premium – Carquest Knock Sensor, SBC3762 (Part No.SBC3762)
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$83.99
Carquest Knock Sensors respond to a wide range of engine knock frequencies providing accurate engine condition to the ECM for optimal ignition timing. Highest quality piezoceramic element manufactured to tight tolerances for increased durability. All Carquest Knock Sensors are designed to meet or exceed OEM specifications at our ISO TS16949 manufacturing facilities.
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Carquest Premium – Carquest Ignition Knock (Detonation) Sensor, SBA4303 (Part No.SBA4303)
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$95.99
Carquest Premium knock sensors are designed to perform in harsh engine environments and meet or exceed original equipment (O.E.) specifications. Carquest Premium knock sensors are built by manufacturers that meet IATF 16949 certified framework, an internationally recognized proof of quality in the automotive industry. We utilize advanced technology to design sensors that are, in many cases, stronger than OE parts. Carquest Premium knock sensors undergo extensive validation testing to ensure long-lasting performance and reliability. Carquest Premium knock sensors are part of our Carquest Vehicle Solutions, which is a full line of engine management and electronics products that help control ignition, fuel delivery and emission systems. Carquest Vehicle Solutions are OE-quality parts designed, engineered and tested by world-class manufacturers to ensure a reliable and long-lasting repair.
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Most Sold 2003 Subaru Forester Ignition Switches
Explore our best-selling Subaru parts for the 2003 Forester among 2 OEM and aftermarket options starting from $8.99.
Sylvania – Sylvania 2721 Long Life: Mini Bulb, Standard Performance, 2 Pack, 2721LLBP2 (Part No.2721LLBP2)
from
$8.99
SYLVANIA Long Life miniature bulbs provide standard performance for your car or truck’s interior and exterior auxiliary lighting. Ideal for use in your car’s back up/reverse, trunk, dome lights and more, Long Life bulbs are a direct replacement for your vehicle. Designed for durability, lower maintenance, and safety in mind.
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Sylvania – Sylvania 168 SilverStar: Mini Bulb, High Performance, 2 Pack, 168STBP2 (Part No.168STBP2)
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$13.99
The SYLVANIA SilverStar high performance miniature bulbs deliver a brighter, whiter light when compared to SYLVANIA Long Life. SYLVANIA achieves this using a specially designed filament, propriety gas mixture and a lamp coating that shifts the color temperature towards a whiter light. A brighter light can improve visibility in your interior lighting applications and increase your visibility to other drivers when braking or turning.
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Top-Rated Ignition and Tune-Up Products Brands For Your 2003 Subaru Forester
Shop for the best-rated brands offering Ignition and Tune-Up Products and other products for your 2003 Subaru Foresters. Below you’ll find some of our best rated Ignition and Tune-Up Products from NGK, Champion, and DENSO, and more. Ignition and Tune-Up Products from these brands that fit a 2003 Forester start at just $4.79 and are rated as high as 4.8 stars. OEM and aftermarket Ignition and Tune-Up Products don’t get more top quality, durable, and affordable than from the brands below.
Popular NGK 2003 Subaru Forester Ignition and Tune-Up Products
When it comes to maintaining or upgrading your 2003 Subaru Forester, using quality Ignition and Tune-Up Products is essential to ensure durability and a perfect fit. NGK ticks all of those boxes. We offer a wide selection of NGK Ignition and Tune-Up Products, specifically designed for the 2003 Subaru Forester. With over 3 NGK brand Ignition and Tune-Up Products in stock, you’re sure to find what you need. The prices for these top-notch parts start as low as $7.49, with an average price of just $10.82. Plus, with over 351 customer reviews and an average rating of 4.8 stars, you can trust that our NGK Ignition and Tune-Up Products will get the job done right. Choose Advance Auto Parts for reliability, quality, and expert-approved parts that keep your vehicle running strong.
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$7.49
(86)
NGK V-Power Nickel Spark Plug (BKR6E-11): Reliable Ignitability & Performance, 2756
“Came pre gapped out of the box.”
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$8.99
(152)
NGK G-Power Platinum Spark Plug (BKR6EGP): Enhanced Durability & Efficiency, 7092
“Charges and Performs Great !”
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$15.99
(113)
NGK Iridium IX Spark Plug (BKR6EIX-11): Enhanced Ignitability & Durability, 3764
“Ayuda al motor mas fuerza”
Popular Champion 2003 Subaru Forester Ignition and Tune-Up Products
Champion auto parts is one of the highest quality Ignition and Tune-Up Product brands in the market. Any 2003 Subaru Forester owner should feel confident when installing genuine Champion parts in their vehicle. To ensure the best fit and performance for your 2003 Forester, Advance Auto Parts carries a full inventory of 3 Champion Ignition and Tune-Up Products. Plus you will be keeping your Subaru in peak condition while saving money because prices on these Champion Ignition and Tune-Up Products range from $4.79 to $6.99, plus, with more than 206 customer reviews and an impressive 4.8 stars average rating, you can be confident the Fram Ignition and Tune-Up Products below will deliver on both quality and value.
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$4.79
(140)
Champion Copper Plus Spark Plug RC12YC – Dependable Performance & Durability, 71-1
“Work as they should”
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$6.99
(61)
Champion Copper Plus RC12YC RC12YC – Dependable Performance & Durability, 71
“Champion always a good brand.”
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$5.99
(5)
Champion Platinum Power Spark Plug RC12PYC – Powerful Performance & Longevity, 3071
“Advance Auto had the part I needed. Not every auto store carries these spark plugs. Website allowed me to know in advance that they had the part in st”
FAQs for 2003 Subaru Forester Ignition and Tune-Up Products
Which Ignition and Tune-Up Products are best-sellers for 2003 Subaru Foresters?
Out of 36 Ignition and Tune-Up Products that fit 2003 Subaru Foresters, the following parts are the top sellers:
- DENSO Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, IK20TT, 4702 (10713003) – $14.99
- NGK Iridium IX Spark Plug (BKR6EIX-11): Enhanced Ignitability & Durability, 3764 (15650054) – $15.99
- Champion Copper Plus Spark Plug RC12YC – Dependable Performance & Durability, 71-1 (10060462) – $4.79
What’s the price range for 2003 Subaru Forester Ignition and Tune-Up Products?
Ignition and Tune-Up Product prices for the 2003 Subaru Forester start at $3.99 and go up to $181.99 for the most premium parts.
What’s the average price of a Ignition and Tune-Up Product for a 2003 Subaru Forester?
The average price for Ignition and Tune-Up Products for the 2003 Subaru Forester is $23.48. Keep in mind the variety of part types within our Ignition and Tune-Up Product category so you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Ignition and Tune-Up Products for other Subaru Forester model years?
What are the cheapest Ignition and Tune-Up Products for my 2003 Subaru Forester?
The cheapest 2003 Subaru Forester Ignition and Tune-Up Products we carry in stock are:
- DENSO Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition, 4504 (11010036) – $3.99
- Autolite Copper Resistor Spark Plug: Quick Starts & Reliable Performance, 3923 (5394163) – $4.49
- Champion Copper Plus Spark Plug RC12YC – Dependable Performance & Durability, 71-1 (10060462) – $4.79
- DENSO U-Groove Spark Plug: OE Performance, K20PR-U11, 3121 (20650410) – $4.99
- Autolite Platinum Spark Plug: Enhanced Durability & Improved Performance, AP3923 (12013889) – $5.49
What are the top-rated Ignition and Tune-Up Products that fit the 2003 Subaru Forester?
Out of 3,122 reviews by customers, our 2003 Subaru Forester Ignition and Tune-Up Products have an average customer rating of . These are some of the highest-rated Ignition and Tune-Up Product types for the 2003 Subaru Forester and their top-rated products:
- Spark Plugs
- Ignition Switches
What types of Ignition and Tune-Up Products do you sell for my 2003 Subaru Forester?
As of 8/2/26, these are some of the most in-demand types of Ignition and Tune-Up Products for a 2003 Subaru Forester:
Can I get help with 2003 Subaru Forester Ignition and Tune-Up Product orders?
Contact our customer support team, by chat or phone, through the help desk page, where you can find instant answers about Subaru Ignition and Tune-Up Products and more.
What is your return policy for Subaru Forester Ignition and Tune-Up Products?
Advance Auto Parts keeps returns simple. For new Subaru Forester Ignition and Tune-Up Products and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.
