Best spark plugs for a 2003 Mitsubishi Eclipse
Spark plug listings at Advance Auto Parts
Advance Auto Parts
Autolite Iridium
Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP3924
MPN XP3924
$11.49
Advance Auto Parts
Bosch
Bosch OE Fine Wire Double Iridium Spark Plug: High Performance & Longevity, 9652
MPN 9652
$12.49
Advance Auto Parts
Champion
Champion Copper Plus Spark Plug RC9YC - Dependable Performance & Durability, 344
MPN 344
$5.49
Advance Auto Parts
Champion
Champion Double Platinum Power Spark Plug RC12PYP - Enhanced Durability & Performance, 7071
MPN 7071
$8.89
Advance Auto Parts
Champion
Champion Iridium Spark Plug RC12WYPB4 - Maximum Performance & Longevity, 9201
MPN 9201
$10.99
Advance Auto Parts
Champion
Champion Platinum Power Spark Plug RC12PYC - Powerful Performance & Longevity, 3071
MPN 3071
$5.99
Advance Auto Parts
Champion
Champion Platinum Power Spark Plug RC9PYC - Powerful Performance & Longevity, 3344
MPN 3344
$5.99
Advance Auto Parts
DENSO
DENSO Double Platinum Spark Plug: OE Performance, lasts 60K+ Miles, PK16PR11, 3264
MPN 3264
$11.49
Advance Auto Parts
DENSO
DENSO Double Platinum Spark Plug: OE Performance, lasts 60K+ Miles, PK20PR11, 3168
MPN 3168
$14.49
Advance Auto Parts
DENSO
DENSO Iridium Long-Life Spark Plug: OE Performance, K16PSR-B8, 3437
MPN 3437
$16.99
Advance Auto Parts
DENSO
DENSO Iridium Long-Life Spark Plug: OE Performance, SK16PR-L11, 3395
MPN 3395
$21.49
Advance Auto Parts
Motorcraft
Motorcraft Double Platinum Spark Plug: Enhanced Durability & Reliability, SP-485
MPN SP-485
$4.79
Advance Auto Parts
Motorcraft
Motorcraft High-Durability Spark Plug: Reduces Misfires & Fuel Consumption, SP-485-X
MPN SP-485-X
$9.99
Advance Auto Parts
NGK
NGK G-Power Platinum Spark Plug (BKR5EGP): Enhanced Durability & Efficiency, 7090
MPN 7090
$8.99
Advance Auto Parts
NGK
NGK Iridium IX Spark Plug (BKR5EIX-11): Extreme Ignitability & Durability, 5464
MPN 5464
$13.99
Advance Auto Parts
NGK
NGK Iridium IX Spark Plug (BKR6EIX): Enhanced Ignitability & Durability, 6418
MPN 6418
$16.99
Advance Auto Parts
NGK
NGK Laser Iridium Spark Plug (IFR5E11): Fine Wire Tip for Efficiency, 7994
MPN 7994
$23.99
Advance Auto Parts
NGK
NGK Laser Iridium Spark Plug (IFR6B): Fine Wire Tip for Efficiency, 6507
MPN 6507
$22.99
Advance Auto Parts
NGK
NGK Laser Platinum Spark Plug (PFR5G-11): Superior Ignitability & Longevity, 2647
MPN 2647
$21.99
Advance Auto Parts
NGK
NGK Ruthenium HX Spark Plug (FR5AHX): High Ignitability & Durability, 95839
MPN 95839
$19.99
Advance Auto Parts
NGK
NGK Ruthenium HX Spark Plug (FR5BHX): High Ignitability & Durability, 96457
MPN 96457
$16.99
Advance Auto Parts
NGK
NGK Ruthenium HX Spark Plug (FR6BHX-S): High Ignitability & Durability, 95159
MPN 95159
$19.49
Advance Auto Parts
NGK
NGK Standard Nickel Spark Plug (BKR5ES-11): Reliable OE Performance, 2382
MPN 2382
$5.99
Advance Auto Parts
NGK
NGK Standard Nickel Spark Plug (BKR6ES): Reliable OE Performance, 6364
MPN 6364
$5.99
Advance Auto Parts
NGK
NGK V-Power Nickel Spark Plug (BKR5E-11): Reliable Ignitability & Smooth Idle, 6953
MPN 6953
$7.49
Advance Auto Parts
NGK
NGK V-Power Nickel Spark Plug (BKR6E): Reliable Performance & Ignitability, 6962
MPN 6962
$6.99Spark plug listings on Amazon
Brand and material notes
Copper plugs are often the least expensive. Platinum and iridium listings usually last longer and cost more. Use the merchant page and your owner’s manual — this site does not assign a heat range or claim a performance gain.
Before you buy
- Confirm the engine code on the vehicle or build sticker.
- Match the OE spark-plug number when you have it.
- Check plug gap, torque, and how many plugs the engine uses.
- Treat Advance and Amazon cards as separate offers, not the same SKU.
Other eligible years
- 2003
This site contains affiliate links. We may earn a commission if you buy through Advance Auto Parts or Amazon. Listings come from merchant catalogs for the selected year, make, and model. They are not OEM confirmation of engine, plug gap, torque, heat range, or quantity.