2003 Cadillac CTS Spark Plugs
More 2003 Cadillac CTS Spark Plugs
Find your specific 2003 Cadillac CTS 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 Cadillac CTS Spark Plugs
NGK – G-Power Spark Plug: Single Platinum Tip Design, BKR6EGP (Part No.7092)
from
$6.29
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
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Product Features:
- SINGLE PLATINUM TIP: Fine wire 0.6 millimeter platinum tip center electrode ensures improved durability and a consistently stable spark
- PLATINUM ALLOY: G-Power platinum provides exceptional value with increased performance and longer service intervals than factory nickel plugs
- TRAPEZOIDAL CUT GROUND ELECTRODE: Reduces quenching design produces improved ignitability and 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
- RECOMMENDED USAGE: Lower cost alternative to double precious metal spark plugs or as an upgrade to OE nickel alloy spark plugs
Autolite – Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration (Part No.AP5224)
from
$4.79
With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite continues to lead the industry. Designed and engineered in the USA, these spark plugs feature a center wire platinum firing tip that reduces gap erosion, minimizes misfires, and enhances performance and durability. The high nickel alloy side electrode maintains a precise gap, while the full platinum tip ensures virtually no gap erosion for extended life. 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. For even greater performance, consider upgrading to Autolite Double Platinum or Iridium XP spark 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 provide better fuel efficiency compared to standard spark plugs.
Champion – Platinum Power Spark Plug: Powerful Perfromance, OE Replacement, RS10PYC4 (Part No.3401)
from
$4.49
Champion Platinum Power spark plugs deliver powerful performance. Made from exclusive Heat-Active alloy, a fine-wire center electrode and V-trimmed ground electrode provides sharp spark focus.
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Product Features:
- Platinum Power- Premium Spark Plug. Powerful Performance.
- Platinum center electrode for long life
- Fine-wire center electrode for greater ignitability
- V-trimmed ground electrode promotes sharper spark focus
- Heat-Active alloy allows electrodes to reach optimal temperature
- Platinum tipped center wire resists wear and helps to maintain proper gap spec over life of the plug
DENSO – Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, ITL16TT (Part No.4717)
from
$12.99
Durability of an OE style plug combined with Power & Torque of high performance.
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Product Features:
- 0.4mm Iridium Center Electrode: World’s Smallest Diameter that maximizes firing potential
- 0.7mm Needle Tip Ground Electrode: Promotes higher spark energy and less heat quenching
- DENSO Patented Optimized Iridium-Rhodium Alloy Formula: Highest concentration of Iridium vs. competitors for greater durability
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Durability of an OE style plug combined with Power & Torque of high performance.
- Withstands temperatures greater than 4000░ Fahrenheit
- Iridium TT
- Ultimate Endurance and Power: The DENSO Iridium TT Spark Plug features a 0.7mm Iridium Tip, ensuring over 100,000 miles of uncompromised performance.
- Advanced Twin-Tip Technology: Developed from Original Equipment Specification Super Ignition Plug (SIP) design, combining a Fine Wire Iridium Center Electrode with a Needle Tip Platinum Ground Electrode.
- Enhanced Fuel Economy and Lower Emissions: Drive around the Earth over 4 times with improved fuel efficiency and reduced emissions.
- Premium Materials: Features an Iridium Center Electrode Tip and a Tapered Seat Type for optimal performance and durability.
NGK – Iridium IX Spark Plug: Single Iridium Fine Wire, LTR6IX (Part No.94374)
from
$11.49
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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Product Features:
- SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark
- IRIDIUM ALLOY CENTER ELECTRODE: Iridium’s density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines
- TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability
- 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: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
- Outstanding Acceleration and High Fuel Efficiency: NGK Iridium IX spark plugs are engineered to deliver superior acceleration and enhance fuel efficiency, making them ideal for performance enthusiasts.
- Extreme Ignitability and Anti-Fouling: These spark plugs offer exceptional ignitability and are designed to resist fouling, ensuring reliable performance in various driving conditions.
- Improved Starting, Idling, and Throttle Response: The tapered cut ground electrode design enhances starting, idling, and throttle response, contributing to a smoother driving experience.
DENSO – Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, ZTJ16VR10 (Part No.3539)
from
$9.99
Manufactured to the strictest OE performance, durability and emissions standards.
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Product Features:
- Latest OE technology with DENSO’s patented Iridium Alloy (90% Ir) and fine wire center electrode
- Platinum ground electrode for extended life
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Sustained spark performance over 100,000 miles
- Lasts up to three times as long as conventional plugs
- Endures extreme temperatures greater than 4,000 degrees F associated with high-performance ignition and special fuel systems
- Iridium Long Life
DENSO – Iridium Long-Life Spark Plug: OE Performance, last 100K+ Miles, ZTJ16R10 (Part No.5090)
from
$10.99
Manufactured to the strictest OE performance, durability and emissions standards.
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Product Features:
- Latest OE technology with DENSO’s patented Iridium Alloy (90% Ir) and fine wire center electrode
- Platinum ground electrode for extended life
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Sustained spark performance over 100,000 miles
- Lasts up to three times as long as conventional plugs
- Endures extreme temperatures greater than 4,000 degrees F associated with high-performance ignition and special fuel systems
- Iridium Long Life
- Enhanced Engine Performance: Enjoy more horsepower, faster and easier starts, and fewer misfires under heavy loads, thanks to the advanced properties of DENSO’s Iridium alloy.
- Fuel Efficiency: Experience better conservation of fuel at all times, contributing to overall improved engine efficiency.
Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RC12PMPB4 (Part No.7318)
from
$9.49
Champion® Double Platinum Power spark plugs deliver more powerful performance with their premium design. Featuring a platinum center and ground electrode, these spark plugs offer greater wear resistance and maintain a stable operating temperature under all engine loads. The fine-wire center electrode ensures greater ignitability, while the V-trimmed ground electrode promotes sharper spark focus. The exclusive Heat-Active alloy allows the electrodes to reach optimal temperature, ensuring maximum life and performance. With a platinum firing tip, flat seat type, and built-in resistor, these spark plugs are designed for exceptional performance and durability.
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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
- Built-in Resistor and Flat Seat Type: Designed with a built-in resistor and flat seat type for exceptional performance and durability.
ACDelco – Iridium Spark Plug: Original Equipment Replacement (Part No.41-118)
from
$9.99
ACDelco GM Original Equipment Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They are our latest in spark plug technology and an exact replacement for your vehicle’s original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. 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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Product Features:
- Iridium is the latest in spark plug technology and is an exact replacement for vehicles’ original components
- Iridium composition provides a high melting point and great strength, helps to provide excellent wear resistance and durability
- Iridium offers excellent engine idle stability, reliable cold starting, quick acceleration and smooth performance
- Three Piece Fired in Suppressor seal meters spark energy for long electrode life, helps prevent combustion leakage and helps block radio frequencies that can affect vehicle electronics
- Iridium plugs are laser-welded which provides precision welds, reduces excess debris and wear rate, thus increasing durability
- 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
ACDelco – Professional Platinum Spark Plug (Part No.F1000582340ACD)
from
$16.56
An ideal plug for vehicles requiring platinum performance or older vehicles calling for conventional plugs, ACDelco’s Professional Platinum Spark Plugs can give up to 100,000 miles of service in some applications.
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Product Features:
- Dual platinum tip for improved resistance to spark erosion and corrosive combustion chamber environment.
- A platinum center electrode and a platinum pad lower the ignition voltage demand.
- 3-piece Fired-In-Suppressor Seal (FISS) helps reduce radio frequency interference, meters spark plug energy to help provide long electrode life and seals against compression leakage.
- Designed with a corrosion-resistant shell.
- Spark gap remains virtually unchanged during the life of the plug.
Autolite Iridium – Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP5224)
from
$9.99
Our best spark plug! 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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Product Features:
- 0.6 mm finewire design improves ignitability
- Patented V-trimmed platinum sidewire technology resists wear
- OE equivalent design is engineered for every engine
- Designed for better overall durability with virtually no gap erosion
- Double Iridium-Enhanced Alloy Technology Center Electrode: Offers improved durability and wear resistance for a longer-lasting spark plug.
- Designed and Engineered in the USA: Reflects over 100 years of Autolite’s engineering experience and expertise.
- Gasket Seat Type: Ensures a secure and proper fit for optimal performance.
NGK – Ruthenium HX High Ignitability Spark Plug: PSPE Tip Design, LTR7BHX (Part No.95605)
from
$14.79
NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.
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Product Features:
- HIGH IGNITABILITY PROJECTED SQUARE PLATINUM ELECTRODE DESIGN: Combines 0.6 millimeter ruthenium center with a unique cut-back PSPE ground electrode
- RUTHENIUM ALLOY CENTER ELECTRODE: NGK’s patented ruthenium technology produces maximum performance, ignitability & durability at high temperatures
- 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: Modern vehicles using OE PSPE type spark plugs or for those seeking an aftermarket plug with the latest OE technology
- Enhanced Fuel Burn: Provides a more complete fuel burn, resulting in quicker throttle response, smoother idle, and better cold starts.
- Industry-Leading Durability: Ruthenium center electrode ensures exceptional durability and longevity.
ACDelco – Professional Iridium Spark Plug (Part No.F1000575832ACD)
from
$17.87
Step up to the latest spark plug technology with ACDelco’s Professional Iridium Spark Plugs. Designed to last more than 100,000 miles in most applications, ACDelco Iridium Plugs are the ideal replacement for today’s top-performing vehicles.
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Product Features:
- Iridium is one of the hardest metals used in spark plugs today, which allows for smaller, more efficient electrode designs for improved cold starting and quicker acceleration.
- Latest evolution in high-performance plug electrode material.
- Improved cold-starting and acceleration characteristics.
- Reduced ignition-system voltage demand saves wear and tear.
- New-vehicle applications using iridium plugs continue to increase.
DENSO – Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, IK20TT (Part No.4702)
from
$10.99
Durability of an OE style plug combined with Power & Torque of high performance.
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Product Features:
- 0.4mm Iridium Center Electrode: World’s Smallest Diameter that maximizes firing potential
- 0.7mm Needle Tip Ground Electrode: Promotes higher spark energy and less heat quenching
- DENSO Patented Optimized Iridium-Rhodium Alloy Formula: Highest concentration of Iridium vs. competitors for greater durability
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Durability of an OE style plug combined with Power & Torque of high performance.
- Withstands temperatures greater than 4000░ Fahrenheit
- Iridium TT
- Ultimate Endurance and Power: The DENSO Iridium TT Spark Plug features a 0.7mm Iridium Tip, ensuring over 100,000 miles of uncompromised performance.
- Advanced Twin-Tip Technology: Developed from Original Equipment Specification Super Ignition Plug (SIP) design, combining a Fine Wire Iridium Center Electrode with a Needle Tip Platinum Ground Electrode.
- Enhanced Fuel Economy and Lower Emissions: Drive around the Earth over 4 times with improved fuel efficiency and reduced emissions.
- Premium Materials: Features an Iridium Center Electrode Tip and a Flat Seat Type for optimal performance and durability.
NGK – Ruthenium HX High Ignitability Spark Plug: DFE Tip Design, TR5AHX (Part No.94567)
from
$14.99
NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE technology as a high ignitability plug; Ruthenium HX spark plugs come with patented, specialized OEM DFE and PSPE tip designs. NGK Ruthenium HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.
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Product Features:
- HIGH IGNITABILITY DOUBLE FINE ELECTRODE DESIGN: Combines 0.6 millimeter ruthenium center with opposed fine wire platinum ground electrode
- RUTHENIUM ALLOY CENTER ELECTRODE: NGK’s patented ruthenium technology produces maximum performance, ignitability & durability at high temperatures
- PLATINUM PIN TYPE GROUND ELECTRODE: Provides more complete fuel burn, quicker throttle response, smoother idle and better cold starts
- 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: Modern vehicles using OE DFE type spark plugs or for those seeking an aftermarket plug with the latest OE technology
- Specialized OEM Tip Designs: Features DFE and PSPE tip designs for enhanced ignitability and efficiency.
- Industry-Leading Durability: Ruthenium center electrode ensures long-lasting performance and reliability.
Champion – Copper Plus Spark Plug: Dependable Performance, OE Replacement, RS12YC (Part No.401)
from
$2.99
Dependable Performance, OE Replacement, RS12YC. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. 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 center electrode tip and tapered seat type further enhance its reliability, making it an excellent choice for maintaining your engine’s efficiency.
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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
- Built to ISO and SAE standards for proven performance
- Enhanced Conductivity and Heat Control: The Champion Copper Plus Spark Plug features a copper core electrode that provides increased conductivity and heat control, ensuring good overall wear and extending the spark plug’s life.
- Reliable Nickel Center Electrode Tip: Featuring a nickel center electrode tip and a tapered seat type, this spark plug enhances reliability and ensures optimal engine performance.
NGK – OE Series Laser Iridium Spark Plug: Fine Wire Tip Design, ILTR5D (Part No.5476)
from
$14.99
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 elect
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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
NGK – OE Series Laser Platinum Spark Plug: Semi-Surface Discharge Tip Design, BKR6EQUP (Part No.3199)
from
$12.99
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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Product Features:
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction fine wire platinum alloy center electrode provides consistent performance
- PLATINUM ALLOY CENTER ELECTRODE: Longer wearing and higher temperature resistance compared to traditional nickel spark plugs
- 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 platinum alloy multi-ground electrode plugs
- High Ignitability and Longer Service Life: NGK Laser Platinum spark plugs offer superior ignitability and extended service life compared to conventional nickel spark plugs.
- Engineered for OE Applications: Specifically designed for Original Equipment (OE) applications, ensuring a perfect fit and optimal performance.
- Enhanced Fuel Efficiency and Lower Emissions: These spark plugs contribute to improved fuel efficiency and reduced emissions, making them an eco-friendly choice.
- Superior Anti-Fouling and Stable Idling: The advanced design provides stable idling and superior resistance to fouling, ensuring consistent engine performance.
NGK – Ruthenium HX High Ignitability Spark Plug: DFE Tip Design, FR6AHX-S (Part No.94279)
from
$15.99
NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for todays modern vehicles. Patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy. Created from advanced OE t
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Product Features:
- HIGH IGNITABILITY DOUBLE FINE ELECTRODE DESIGN: Combines 0.6 millimeter ruthenium center with opposed fine wire platinum ground electrode
- RUTHENIUM ALLOY CENTER ELECTRODE: NGK’s patented ruthenium technology produces maximum performance, ignitability & durability at high temperatures
- PLATINUM PIN TYPE GROUND ELECTRODE: Provides more complete fuel burn, quicker throttle response, smoother idle and better cold starts
- 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: Modern vehicles using OE DFE type spark plugs or for those seeking an aftermarket plug with the latest OE technology
Autolite Iridium – Iridium Ultra Finewire Spark Plug: Optimal Performance, Durability, Ignitability (Part No.AI5245)
from
$10.99
Autolite Iridium Ultra Laser Finewire Spark Plugs are one of our brand’s most technologically advanced products. These spark plugs provide superior durability, more focused ignition with better overall ignitability for optimum performance. Autolite Spark Plugs are the best alternative to OE spark plugs, offering OE fit form and function supporting all foreign and domestic makes and models at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs in the world.
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Product Features:
- Autolite Iridium Ultra is an engineered OE replacement iridium spark plug.
- A laser-welded 0.5mm pure iridium finewire center electrode provides optimal fuel efficiency, acceleration and focused ignitability.
- Nickel-plated shell to resist corrosion.
- High-alumina ceramic insulator for increased strength.
- Laser welded 0.5mm Iridium finewire center electrode.
- Proprietary platinum sidewire technology.
- Superior Durability: Autolite Iridium Ultra Laser Finewire Spark Plugs are designed for long-lasting performance, ensuring your vehicle runs smoothly over extended periods.
- OE Fit and Function: Autolite Spark Plugs offer an original equipment (OE) fit, form, and function, making them a reliable alternative for all foreign and domestic makes and models.
- Technologically Advanced: As one of Autolite’s most advanced products, these spark plugs incorporate cutting-edge technology for superior performance.
- Value Pricing: Despite their advanced features and high quality, Autolite Iridium Ultra Laser Finewire Spark Plugs are available at a value price, making them an economical choice for vehicle maintenance.
ACDelco – Iridium Spark Plug: Original Equipment Replacement (Part No.41-147)
from
$9.99
ACDelco GM Original Equipment Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They are our latest in spark plug technology and an exact replacement for your vehicle’s original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. 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.
Product Features:
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Product Features:
- Iridium is the latest in spark plug technology and is an exact replacement for vehicles’ original components
- Iridium composition provides a high melting point and great strength, helps to provide excellent wear resistance and durability
- Iridium offers excellent engine idle stability, reliable cold starting, quick acceleration and smooth performance
- Three Piece Fired in Suppressor seal meters spark energy for long electrode life, helps prevent combustion leakage and helps block radio frequencies that can affect vehicle electronics
- Iridium plugs are laser-welded which provides precision welds, reduces excess debris and wear rate, thus increasing durability
- 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
ACDelco – Iridium Spark Plug: Original Equipment Replacement (Part No.41-104)
from
$11.99
ACDelco GM Original Equipment Iridium Spark Plugs are designed, engineered, and tested to rigorous standards, and are backed by General Motors. They are our latest in spark plug technology and an exact replacement for your vehicle’s original components. Iridium composition provides a high melting point and great strength, and provides excellent wear resistance and durability. 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.
Product Features:
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Product Features:
- Iridium is the latest in spark plug technology and is an exact replacement for vehicles’ original components
- Iridium composition provides a high melting point and great strength, helps to provide excellent wear resistance and durability
- Iridium offers excellent engine idle stability, reliable cold starting, quick acceleration and smooth performance
- Three Piece Fired in Suppressor seal meters spark energy for long electrode life, helps prevent combustion leakage and helps block radio frequencies that can affect vehicle electronics
- Iridium plugs are laser-welded which provides precision welds, reduces excess debris and wear rate, thus increasing durability
- 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
- Resistor Type: Equipped with a resistor to help reduce radio frequency interference, ensuring smooth engine performance.
- Conical Seat Type: Features a conical seat type for a secure fit and optimal performance in GM vehicles.
Autolite – Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration (Part No.AP5263)
from
$4.79
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Platinum spark plugs provide a center wire platinum firing tip which provides reduced gap erosion, fewer misfires, better performance and increased durability. Consider upgrading to Autolite Double Platinum or Iridium XP spark plugs for increased performance.
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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)
Autolite Iridium – Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition (Part No.XP5243)
from
$9.99
Our best spark plug! 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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Product Features:
- 0.6 mm finewire design improves ignitability
- Patented V-trimmed platinum sidewire technology resists wear
- OE equivalent design is engineered for every engine
- Designed for better overall durability with virtually no gap erosion
Champion – Double Platinum & Power Spark Plug Exceptional Perf OE Replacement RES11PYPB5 (Part No.7437)
from
$6.99
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
Champion – Iridium Spark Plug: Maximum Performance, OE Replacement, RS8WYPB5 (Part No.9808)
from
$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
Autolite Iridium – Iridium Ultra Finewire Spark Plug: Optimal Performance, Durability, Ignitability (Part No.AI5863)
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$10.99
Autolite Iridium Ultra Laser Finewire Spark Plugs are one of our brand’s most technologically advanced products. These spark plugs provide superior durability, more focused ignition with better overall ignitability for optimum performance. Autolite Spark Plugs are the best alternative to OE spark plugs, offering OE fit form and function supporting all foreign and domestic makes and models at a value price. Autolite provides the automotive aftermarket and original equipment manufacturers with the highest quality ignition products and is the leading supplier of spark plugs in the world.
Product Features:
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Product Features:
- Autolite Iridium Ultra is an engineered OE replacement iridium spark plug.
- A laser-welded 0.5mm pure iridium finewire center electrode provides optimal fuel efficiency, acceleration and focused ignitability.
- Nickel-plated shell to resist corrosion.
- High-alumina ceramic insulator for increased strength.
- Laser welded 0.5mm Iridium finewire center electrode.
- Proprietary platinum sidewire technology.
- Superior Durability: Autolite Iridium Ultra Laser Finewire Spark Plugs are designed for long-lasting performance, ensuring extended service life and reliability.
- OE Fit and Function: Autolite Spark Plugs offer an OE fit, form, and function, making them a perfect alternative to original equipment spark plugs for all foreign and domestic makes and models.
- High-Quality Construction: As a leading supplier of spark plugs globally, Autolite ensures the highest quality ignition products for both the automotive aftermarket and original equipment manufacturers.
- Value Pricing: Despite their advanced technology and superior performance, Autolite Iridium Ultra Laser Finewire Spark Plugs are available at a value price, providing excellent cost-effectiveness.
Motorcraft – SPARK PLUG (Part No.SP-442-X)
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$6.99
SPARK PLUG
Popular 2003 Cadillac CTS Spark Plugs Categories
2003 Cadillac CTS Spark Plugs
Maybe you’re in the middle of a full rebuild of that 2003 Cadillac CTS. Maybe you just need a couple of Spark Plugs. Either way, Advance Auto Parts has 22 different Spark Plugs in our inventory ranging from $3.49 to $21.13. That means you can find the exact parts or products you need to keep that 2003 Cadillac CTS running smoothly.
Spark Plugs are only as good as their brand. We stock 6 different brands to make sure you have plenty of trusted parts to choose from for your 2003 Cadillac CTS. 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 Cadillac CTS, but don’t take our word for it – read our customer ratings and reviews and buy with confidence. Out of the 3,118 reviews in this category, some of the top rated parts include OE Series Laser Platinum Spark Plug: Semi-Surface Discharge Tip Design, BKR6EQUP with 4.8 stars and Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition with 4.6 stars.
So if you’re in the market for aftermarket Spark Plugs to keep your 2003 Cadillac CTS 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 Cadillac CTS Last
Simple repair, complete replacement, or a full rebuild. No matter the job, your 2003 Cadillac CTS 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 CTS 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 Cadillac CTS, our most popular NGK Spark Plugs include:
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$9.99
(3)
OE Series Standard Nickel Spark Plug: Semi-Surface Discharge Tip Design, BKR6EKUB
Spark Plugs
Top 2003 Cadillac CTS Spark Plugs from Autolite
Autolite products are another trusted brand when it comes to Spark Plugs for your 2003 Cadillac CTS. Popular Autolite parts include:
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$4.79
(298)
Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration
Spark Plugs
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$6.79
(123)
Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life
Spark Plugs
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$3.49
(117)
Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration
Spark Plugs
FAQs for 2003 Cadillac CTS Spark Plugs
What are the most purchased Spark Plugs for the 2003 Cadillac CTS?
Out of 22 Spark Plugs for the 2003 Cadillac CTS, the most popular in our inventory are:
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$9.99
This product is not rated
Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
Spark Plugs
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$10.99
(153)
Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, IK20TT
Spark Plugs
What are the top-rated 2003 Cadillac CTS Spark Plugs?
Top-rated Spark Plugs for your 2003 Cadillac CTS based on customer reviews/ratings are:
from
$12.99
(155)
OE Series Laser Platinum Spark Plug: Semi-Surface Discharge Tip Design, BKR6EQUP
“Great so far!”
from
$3.99
(105)
Platinum TT Spark Plug with Twin-Tip Design for Enhanced Ignition
“Very nice quality. Installed like factory. Ran great.”
