What kind of spark plugs does Toyota Yaris use?
Most Toyota Yaris models use iridium- or platinum-tipped spark plugs designed for long service life, with replacement intervals often around 60,000 to 120,000 miles. The exact plug type and gap specification depend on the engine code and market, so verify with the owner's manual or a dealer using your VIN.
Common spark plug types by Yaris engine family
The Yaris has been offered with several gasoline and hybrid powertrains. The spark plugs used are typically iridium- or platinum-tipped with long-life design, with replacement intervals commonly around 60,000–120,000 miles depending on the model. The exact plug type and gap specification depend on engine code and market.
- 1NR-FE (1.5L gasoline) engine: Iridium-tipped, long-life plugs; replacement interval commonly around 100,000 miles in many regions.
- 1KR-DE / 1.0–1.3L engines (common in early Yaris/Vitz and some markets): Platinum- or iridium-tipped plugs; replacement intervals typically 60,000–100,000 miles depending on grade and maintenance conditions.
- Hybrid 1.5L Atkinson-cycle engine (Yaris Hybrid): Iridium- or platinum-tipped long-life plugs; replacement intervals around 120,000 miles or more in typical service schedules.
Always verify the exact plug type and interval for your vehicle using the owner's manual or a dealer with your VIN.
How to identify the exact spark plug for your Yaris
To ensure you choose the correct spark plugs, identify your engine code and model year, then cross-check with official Toyota documentation or a trusted parts supplier.
- Find your engine code on the engine block or through the vehicle's information label; common Yaris codes include 1NR-FE, 1KR-DE, or the hybrid's Atkinson-cycle designation.
- Consult the owner's manual or service manual for the recommended plug type and gap specification for that engine code.
- If in doubt, use your VIN to search Toyota's official parts catalog or ask a Toyota dealer to pull OEM replacement plugs designed for your exact vehicle.
- Compare any suggested part numbers or fitments from reputable sources (NGK, Denso, or OEM equivalents) to ensure compatibility.
- Install the plugs with the recommended torque and gap, and consult a professional if you are unsure about the process.
Even when the manual points to a general "iridium" or "platinum" class plug, exact part numbers and heat ranges vary by engine and market. Always confirm before purchasing.
Maintenance tips and signs of wear
Even long-life plugs can wear out or degrade performance over time. Watch for these indicators and follow best-practice maintenance to preserve efficiency and smooth running.
- Signs of worn plugs: rough idle, engine misfire, reduced power, decreased fuel economy, hard starting, or illumination of the check engine light.
- Maintenance tips: use OEM or manufacturer-approved equivalents, replace per the recommended interval for your engine code, and avoid over-torquing. Do not use anti-seize on newer plugs unless specified, and ensure proper heat range and gap.
- Additional considerations: when replacing plugs on a hybrid, ensure you follow the service procedure; some hybrids require specialized tools or procedures for correct torque and inspection of ignition coils. If in doubt, have a professional perform the service.
Sticking to the recommended replacement schedule helps prevent misfires and preserves efficiency and emissions performance.
Summary
Spark plugs in the Toyota Yaris are generally iridium- or platinum-tipped long-life units, but the precise type, heat range, and replacement interval depend on the specific engine and market. Always confirm via the owner's manual or a dealer using your VIN to ensure you choose the correct plugs and follow the right maintenance interval.
