What brand of spark plugs does Subaru use?
Subaru does not rely on a single spark plug brand across its lineup. The original equipment plugs are typically supplied by NGK or Denso, depending on engine family and regional market.
Subaru’s spark plug branding varies by engine design and market, so the exact brand you’ll find on a given car isn’t fixed across the brand. The most reliable path to the correct plug is to consult the owner's manual or the official Subaru parts catalog for your specific model and year, or ask a dealership or trusted mechanic to confirm the correct spark plug type, heat range, and gap.
Which brands Subaru uses as OEM
The two brands most commonly found on Subaru’s factory-installed plugs are NGK and Denso. The particular brand used can vary by engine family (for example, EJ-, FA-, or FB-series engines) and by region. Always verify with the specific application for your car.
- NGK
- Denso
Either brand can be used as a replacement, provided you match the exact heat range, gap, and thread size required for your engine. When in doubt, refer to the OEM part number in the parts catalog or ask a Subaru dealer.
How to determine the correct plug for your Subaru
Check the owner's manual and service documentation
Your owner's manual, maintenance schedule, or dealership service bulletins will specify the correct spark plug type, heat range, and gap for your engine code and year. This is the most reliable starting point.
Consult Subaru's official parts catalog or a dealer
Enter your vehicle's model year, engine code, and trim in the Subaru Parts Online catalog or ask a parts adviser at a dealership to confirm the exact OEM plug, or a modern equivalent from NGK or Denso that meets Subaru's specifications.
What to do if you can't access the official specs
If you can't locate the official spec, use a reputable cross-reference and ensure you select a spark plug with the same heat range and gap as the OEM. Do not exceed torque specs or change the gap beyond factory recommendations without guidance.
Replacement considerations and tips
When replacing spark plugs on a Subaru, ensure you use the correct torque, clean the threads in the cylinder head, and check other ignition-related components. The engine types (EJ, FA, FB) and model years can differ in torque specification and recommended gap. For modern engines like FA/FB, you may need a specific design (e.g., iridium vs copper) or a particular gap; consult the manual for exact details.
- Follow the official torque specification when installing plugs.
- Use anti-seize or thread lubricant only if specified; many modern plugs come with coatings that reduce the need for anti-seize.
- After installation, check for misfire codes and verify smooth engine operation.
In practice, sticking to the OEM-spec replacement plugs from NGK or Denso will ensure reliability and maintain factory performance, with the option to choose between those two brands if the exact OEM number is unavailable.
Summary
Subaru does not designate a single spark plug brand for all models. OEM plugs are typically manufactured by NGK or Denso, with the exact brand determined by engine family and market. Always verify the correct part number, heat range, and gap for your vehicle in the owner's manual or Subaru parts catalog, and consult a dealer if you are unsure. Using the correct plug type helps maintain engine performance, fuel efficiency, and emissions compliance.
