2003 Subaru Outback Spark Plugs
More 2003 Subaru Outback Spark Plugs
Find your specific 2003 Subaru Outback original or aftermarket Spark Plugs below. Order your parts online and have delivered to your home or pick up in-store at Advance Auto.
Essential 2003 Subaru Outback Spark Plugs
E3 – DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (Part No.E3.68)
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$6.99
The Spark Plugs are the product of years of fundamental research in the combustion field. The unique patented electrode configuration of these new The spark plugs increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines. E3.68 is a 14mm, 1.000 reach plug with a gasket seat. It fits a wide variety of late model applications, especially Hemi applications. E3.68 is widely stocked in automotive retail stores. The automotive plugs have three legs securing the Diamond FIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented Diamond FIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.
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Product Features:
- E3’s Diamond Fire edge to edge ground electrode provides maximum performance with increased efficiency and a faster more complete burn
- Smoother Acceleration & Idle – The faster flame initiated by the The spark plug results in a more complete burn of the ingested fuel charge. More pressure is created against the piston more fuel is put to work
- Energy – Power output improved up to 6% on average in the typical operating ranges. Results will vary.
- Efficiency – The “diamond shaped” side wire electrode projects the combustion spark in a way that more quickly ignites the air/fuel mixture, thereby creating a significantly faster and larger flame kernel. The result is that more fuel is put to work durin
- E3’s patented Diamond Fire Technology provides a cleaner burning combustion, which translates into fuel savings and reduced engine carbon deposits
- The Spark Plugs are pre-gapped at the factory and cannot be adjusted.
- Wide Compatibility: E3.68 spark plugs are 14mm with a 1.000 reach and a gasket seat, fitting a wide variety of late model applications, especially Hemi engines.
- Enhanced Heat Transfer: The three legs securing the Diamond FIRE electrode to the shell ensure excellent heat transfer and create more turbulence in the cylinder for better combustion.
- Widely Available: E3.68 spark plugs are widely stocked in automotive retail stores, making them easily accessible for consumers.
E3 – DiamondFIRE Automotive Spark Plug: More Power, Saves Gas (Part No.E3.48)
from
$6.99
The Spark Plugs are the product of years of fundamental research in the combustion field. The unique patented electrode configuration of these new The spark plugs increases the amount of combustion pressure created during each power stroke of an engine, which results in a marked increase in power output, fuel economy, and reduced emissions in all gasoline engines. E3.48 is a 14mm, 0.750 reach plug with a gasket seat. It fits a wide variety of late model applications, especially import. E3.48 is widely stocked in automotive retail stores. The automotive plugs have three legs securing the Diamond FIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented Diamond FIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use.
Product Features:
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Product Features:
- E3’s Diamond Fire edge to edge ground electrode provides maximum performance with increased efficiency and a faster more complete burn.
- Smoother Acceleration & Idle – The faster flame initiated by the The spark plug results in a more complete burn of the ingested fuel charge. More pressure is created against the piston more fuel is put to work
- Energy – Power output improved up to 6% on average in the typical operating ranges. Results will vary.
- Efficiency – The “diamond shaped” side wire electrode projects the combustion spark in a way that more quickly ignites the air/fuel mixture, thereby creating a significantly faster and larger flame kernel. The result is that more fuel is put to work durin
- E3’s patented Diamond Fire Technology provides a cleaner burning combustion, which translates into fuel savings and reduced engine carbon deposits
- The Spark Plugs are pre-gapped at the factory and cannot be adjusted.
NGK – OE Series V-Power Nickel Spark Plug: V-Groove Tip Design, BKR5E-11 (Part No.6953)
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$4.99
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
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Product Features:
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- NGK’s OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
Champion – Copper Plus Spark Plug: Dependable Performance, OE Replacement, REC10YC4 (Part No.975)
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$2.29
Dependable performance. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
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Product Features:
- Copper Plus – Dependable Performance and Durability
- Copper core center electrode allows for accurate control of heat range for longer life
- Superior corrosion resistance
- Built to ISO and SAE standards for proven performance
Autolite – Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (Part No.APP5683)
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$6.79
With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite delivers exceptional quality. Designed and engineered in the USA, these spark plugs feature platinum-to-platinum firing, virtually eliminating gap erosion and reducing misfires. The OE design and full-platinum tips on both the center and side electrodes optimize engine performance for a longer life and improved fuel economy. The platinum ball welding process ensures a consistent point of contact for enhanced adhesion, making these spark plugs a reliable choice for superior durability and longevity.
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Product Features:
- Works to optimize engine performance for a longer life and improved fuel economy
- OE design
- Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear
- Platinum ball welding process provides a consistent point of contact for enhanced adhesion
- Engineered in the USA: Backed by over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite spark plugs are designed and engineered in the USA for exceptional quality and performance.
Motorcraft – Platinum Spark Plug: Enhances Durability & Reduces Fuel Consumption (Part No.SP-497)
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$6.99
Motorcraft Spark Plugs are original equipment on Ford Motor Company vehicles, engineered to meet strict Ford engineering standards for performance and reliability. These spark plugs are matched to specific engines to provide enhanced durability, eliminate misfires, reduce fuel consumption, and optimize emissions. With a platinum center and ground electrode tip, they are resistant to oxidation and arc erosion, ensuring long-lasting performance. The multi-rib insulator protects against misfires, and they are backed by Motorcraft’s Service Parts Warranty. Designed for exact fit in Ford, Lincoln, and Mercury vehicles, these spark plugs also help prevent false check engine lights and offer service intervals of up to 100,000 miles. Crafted with high-quality materials, Motorcraft Spark Plugs deliver reliable performance for a broad range of applications, including domestic and import cars and trucks of all makes and sizes.
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Product Features:
- Motorcraft spark plugs are matched to specific engines to provide enhanced durability, eliminate misfires, reduce fuel consumption and optimize emissions.
- Backed by Motorcraft’s Service Parts Warranty
- Exact fit for Ford, Lincoln and Mercury vehicles
- Resistant to oxidation and arc erosion.
- Multi-rib insulator protects against misfire.
- Service intervals of up to 100,000 miles.
- Motorcraft Spark Plugs are designed with high quality materials to provide reliable performance for almost any application.
- Motorcraft Spark Plugs are what was in the vehicle when it was manufactured
- Motorcraft ignition components help prevent false check engine lights.
- Enhanced Durability: Engineered to meet strict Ford engineering standards, these spark plugs are designed to provide long-lasting performance with a platinum center and ground electrode tip that resist oxidation and arc erosion.
DENSO – Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IKH20 (Part No.5344)
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$12.29
Increased performance with World’s smallest Iridium Center Eletrode (0.4mm).
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Product Features:
- World’s smallest Iridium Center Electrode (0.4mm) for improved spark for maximum combustion
- Patented 360-degree laser welding assembly process
- U-groove and taper cut ground electrode to maximize flame propagation.
- Withstands temperatures greater than 4000┬░ Fahrenheit
- Burnished nickel plating for high temperature endurance and superior corrosion resistance
- Wide range of part numbers for thousands of applications, including classic and collector cars
- Iridium Power
- Superior Performance: This spark plug requires 5,000 less volts to fire compared to conventional spark plugs, providing maximum performance even under extreme conditions.
- Enhanced Horsepower and Efficiency: Experience more horsepower, faster and easier starts, fewer misfires under heavy loads, and better fuel efficiency with the DENSO Iridium Power spark plug.
NGK – OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, IFR5E11 (Part No.7994)
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$18.99
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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Product Features:
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire iridium alloy center electrode provides consistent performance
- IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
- PLATINUM TIP GROUND ELECTRODE: Unless OE specified, platinum protection at the ground electrode provides excellent ignitability and service life
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- RECOMMENDED USAGE: Best for vehicles with OE fine wire iridium alloy plugs
- Superior Durability: The iridium-tipped center electrode is six times harder than platinum, ensuring long-lasting performance and reliability.
- Optimized for OE Applications: Engineered specifically for Original Equipment (OE) applications, ensuring a perfect fit and optimal performance.
- Even Wear: Features a platinum pad on the ground electrode, designed for even wear in distributorless ignition systems.
- Fine Wire Tip Design: The fine wire tip design of the IFR5E11 model enhances ignition efficiency and performance.
- Fine Wire Tip Design: The fine wire tip design of the IFR7X7G model ensures efficient and consistent spark delivery for optimal engine performance.
Autolite – Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration (Part No.AP5325)
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$4.79
With over 100 years of engineering expertise and over 11 billion plugs sold, Autolite Platinum spark plugs are designed and engineered in the USA to deliver exceptional performance. Featuring a high nickel alloy side electrode that maintains a precise gap and a full platinum tip that ensures virtually no gap erosion, these spark plugs offer long-lasting durability. The necked-down center electrode fires quicker and cleaner with less voltage, resulting in easier starts, quicker acceleration, and improved fuel economy compared to standard plugs.
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Product Features:
- High nickel alloy side electrode maintains precise gap
- Full platinum tip assures virtually no gap erosion for long life
- Necked-down center electrode fires quicker, cleaner with less voltage for easier starts, quicker acceleration and improved fuel economy (as compared to standard plugs)
- Improved Fuel Economy: Designed to enhance fuel efficiency compared to standard plugs.
- Engineered in the USA: Backed by over 100 years of engineering expertise and over 11 billion plugs sold.
Champion – Iridium Spark Plug: Maximum Performance, OE Replacement, RC10WYPB4 (Part No.9001)
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$8.49
Champion® Iridium – the ultimate element. This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance.
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Product Features:
- Champion Iridium – Maximum Performance. Premium Spark Plug
- Iridium center electrode delivers maximum life
- Fine-wire center electrode and V-trimmed for greater ignitability
- V-trimmed ground electrode promotes sharper spark focus
- Maintains stable operating temperature under all engine loads
- Heat-Active┐ alloy allows electrodes to reach optimal temperature quickly
ACDelco – Double Platinum Spark Plug (Part No.41-800)
from
$9.79
ACDelco Professional Double Platinum Spark Plugs are premium aftermarket plugs, and are a high quality replacement for many vehicles on the road today. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.
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Product Features:
- One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
- Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
- Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
- Some ACDelco GM Original Equipment parts may have formerly appeared as GM Genuine Parts (OE) or ACDelco Professional
- ACDelco GM Original Equipment parts are designed, engineered and tested to rigorous standards, and are backed by General Motors
- GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
- GM regularly updates production and service part designs to integrate new materials and technologies
Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement REC10PYPB4 (Part No.7975)
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$7.99
Champion® Double Platinum Power¿ spark plugs deliver more powerful performance. Featuring exclusive Heat-Active¿ alloy, platinum fine wire center electrode and platinum pad ground electrode provide maximum life and sharper spark focus.
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Product Features:
- Double Platinum Power – Premium Spark Plug. More Powerful Performance.
- Platinum center and ground electrode for greater wear resistance
- Maintains stable operating temperature under all engine loads
- Fine-wire center electrode for greater ignitability
- V-trimmed ground electrode promotes sharper spark focus
- Heat-Active┐ alloy allows electrodes to reach optimal temperature
Autolite – Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration (Part No.3924)
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$3.79
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance.
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Product Features:
- Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
- Multi-rib insulator reduces danger of “flash-over”
- One-piece terminal post adds strength
- Resistor reduces radio frequency interference (RFI) and electrode erosion
NGK – OE Series Laser Iridium High Ignitability Spark Plug: PSPE Tip Design, SILFR6C11 (Part No.7505)
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$19.99
NGK Laser Iridium High Ignitability spark plugs offer the best combination of performance and longevity. Engineered specifically for OE applications, Laser Iridium High Ignitability spark plugs are tested to the highest standards to ensure quality and dur
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Product Features:
- ACTUAL OE or EQUIVALENT HIGH IGNITABILITY DESIGN: PSPE tip and iridium alloy center electrode produce the most advanced OE spark plug technology
- IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
- PSPE DESIGN: Projected square platinum electrode shape of the ground electrode provides the best ignitability and service life for high heat engines
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- RECOMMENDED USAGE: Best for vehicles with OE PSPE iridium alloy plugs
Nippon Reinz – Spark Plug Tube Seal (Part No.A8027521369NRZ)
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$4.68
Spark Plug Tube Seal
Popular 2003 Subaru Outback Spark Plugs Categories
2003 Subaru Outback Spark Plugs
Maybe you’re in the middle of a full rebuild of that 2003 Subaru Outback. Maybe you just need a couple of Spark Plugs. Either way, Advance Auto Parts has 29 different Spark Plugs in our inventory ranging from $3.49 to $17.99. That means you can find the exact parts or products you need to keep that 2003 Subaru Outback running smoothly.
Spark Plugs are only as good as their brand. We stock 8 different brands to make sure you have plenty of trusted parts to choose from for your 2003 Subaru Outback. Autolite, NGK, and DENSO are just some of the brands we stock. Search for brands you know or compare prices and reviews to help you decide!
We know you’ll find the perfect Spark Plugs for your 2003 Subaru Outback, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 2,368 reviews in this category, some of the top rated parts include Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition with 4.6 stars and Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IK20 with 4.8 stars.
So if you’re in the market for aftermarket Spark Plugs to keep your 2003 Subaru Outback rolling for years to come, look no further. Shop online and have your products shipped direct to your door, or pick up at the nearest Advance Auto Parts location today!
Spark Plugs Brands To Make Your 2003 Subaru Outback Last
Simple repair, complete replacement, or a full rebuild. No matter the job, your 2003 Subaru Outback demands trusted brand parts and products to keep it running. Many trusted brands of Spark Plugs make up Advance Auto Parts’ inventory, and all are ready to help make your Outback the best it can be. Be sure to browse some of our top Spark Plugs brands and parts.
Popular NGK Spark Plugs
We carry NGK parts in our stock across Spark Plugs categories, plus more. For a 2003 Subaru Outback, our most popular NGK Spark Plugs include:
Top 2003 Subaru Outback Spark Plugs from Autolite
Autolite products are another trusted brand when it comes to Spark Plugs for your 2003 Subaru Outback. Popular Autolite parts include:
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$4.79
(149)
Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration
Spark Plugs
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$9.99
(141)
Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
Spark Plugs
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$6.79
(55)
Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life
Spark Plugs
FAQs for 2003 Subaru Outback Spark Plugs
What are the most purchased Spark Plugs for the 2003 Subaru Outback?
Out of 29 Spark Plugs for the 2003 Subaru Outback, the most popular in our inventory are:
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$10.99
(153)
Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IK20TT
Spark Plugs
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$3.49
(53)
Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration
Spark Plugs
What are the top-rated 2003 Subaru Outback Spark Plugs?
Top-rated Spark Plugs for your 2003 Subaru Outback based on customer reviews/ratings are:
from
$3.99
(105)
Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition
“Very nice quality. Installed like factory. Ran great.”
