Infiniti spark plugs are not tied to a single brand across all models. In most cases, the original equipment plugs are supplied by NGK or Denso, depending on the engine and regional market.
In this article, we explain which brands Infiniti commonly uses and how to determine the correct plug for your vehicle, so you can source the right replacement without guesswork.
Common OEM brands for Infiniti
Two brands stand out as primary suppliers for Infiniti’s factory-installed spark plugs. The following list highlights each brand and its typical role in Infiniti engines.
- NGK: Widely used as original equipment for many Infiniti models, particularly on various V6 and V8 engines. NGK plugs appear in Infiniti maintenance guides and OEM catalogs.
- Denso: Another major supplier of Infiniti OEM spark plugs, used on several engines and market variants. Denso plugs are commonly specified for certain engines and regions.
Note: Not every Infiniti model uses both brands. The correct brand and part number depend on your specific engine family and year. Always verify the exact OEM specification for your car before buying.
How to confirm the right brand for your Infiniti
To ensure you source the correct spark plugs, follow these verification steps. Use them to match the original equipment, avoid incorrect replacements, and maintain optimal performance.
- Identify your exact model, year, and engine code (for example, engine family such as VQ35DE or VQ37VHR).
- Check the owner's manual or service/maintenance booklet for the OEM spark plug specification or part number.
- Use Infiniti’s official parts catalog or a VIN-based parts lookup to confirm the recommended brand.
- Consult a Nissan/Infiniti dealer or trusted independent shop if you’re unsure or need a cross-reference between NGK and Denso options.
- When in doubt, obtain the exact OEM replacement by part number listed in the catalog, as specific numbers vary by engine.
Concluding: verifying your engine’s specific requirements will prevent mistakes and ensure you install the correct spark plug brand and part number for your Infiniti.
Summary
Infiniti typically sources its factory spark plugs from NGK or Denso, with the exact brand depending on the model and engine. Always verify the OEM specification for your vehicle via the owner's manual, dealer, or a VIN-based parts lookup to ensure you purchase the correct plug.