OEM Bosch Spark Plug, Part No. 0242129529.

• Application/Position: Engine cylinder head – ignition system.

• Function: Generates a reliable spark to ignite the air-fuel mixture, ensuring optimal combustion, smooth performance, and reduced emissions.

• Compatibility: Fits a range of Toyota, Lexus, and Nissan engines (verify with VIN/engine code). Direct replacement for Bosch 5989 and equivalent to various OEM spark plug references.

• Material/Construction: Advanced double iridium electrode design with heat-resistant ceramic insulator and pre-set gap for long-lasting performance.

• Performance: Meets or exceeds OEM standards for ignition reliability, electrode wear resistance, and efficiency under demanding conditions.

• Replacement Interval: Replace every 60,000–100,000 km depending on usage and manufacturer service guidelines.