The Altima uses iridium-tipped spark plugs: four plugs for the 2.5L four-cylinder and six plugs for the 3.5L V6.
Exact part numbers, gap specs and whether your car uses NGK or Denso plugs depend on the engine option and trim. Nissan commonly references OEM iridium or platinum plugs and sources two main brands (NGK and Denso). To be precise, check your owner's manual, the under-hood label, or the Nissan Parts catalog for your VIN-backed specification.
Engine options and spark plug configuration
These entries summarize how many plugs each engine option uses and the general plug type typical for the 2017 Altima.
- 2.5L I4 (QR25DE): four spark plugs; typically iridium- or platinum-tipped plugs; common OEM equivalents come from NGK or Denso; follow Nissan's recommended replacement interval as listed in the owner's manual.
- 3.5L V6 (VQ-based): six spark plugs; typically iridium- or platinum-tipped plugs; same brand options; replacement interval and specifications align with the manual for this engine.
In short, the number of spark plugs tracks with the engine’s cylinder count, and the plugs are generally iridium or platinum in quality, with OEM-equivalent options from NGK or Denso.
How to identify the exact spark plug for your car
To ensure you buy the correct spark plugs, follow these steps:
- Check your vehicle’s exact engine option and code in the owner's manual or on the under-hood label.
- Use your VIN to look up the precise spark plug part number in Nissan's official Parts Catalog or by asking a Nissan dealer.
- If you can access the existing plugs, read the markings on the metal shell for brand and type clues (NGK or Denso iridium/platinum plugs are common).
- Buy OEM-equivalent iridium plugs from a reputable brand (NGK or Denso) and install them following Nissan’s torque and gap specifications in the manual.
These steps help ensure you select the correct plugs for your Altima’s engine and trim; using the wrong plug can affect performance and may impact warranty coverage.
Summary
The 2017 Nissan Altima typically uses iridium-tipped spark plugs, with four plugs for the 2.5L four-cylinder and six plugs for the 3.5L V6. Exact part numbers vary by engine and VIN, so always verify through the owner's manual or Nissan Parts catalog. When replacing, stick to OEM-equivalent iridium plugs from NGK or Denso and follow Nissan’s service guidelines for torque, gap, and intervals.