Nissan Laurel C33 Air Regulator Valve IAC RB20

Restore smooth idle performance in your Nissan Laurel C33 with Terra Firma Automotive’s New Genuine Air Regulator Valve (IAC) for the RB20 engine. This original Unisia Jecs OE unit is engineered specifically for twin-cam RB20DE engines and is a critical component for maintaining stable idle speed under varying conditions. Often overlooked during routine maintenance, a failing IAC valve can cause frustrating idle surges, stalls, or erratic engine behavior—especially when the engine is cold.

Terra Firma Automotive offers only genuine Nissan parts to ensure perfect fitment and factory-level reliability. This brand-new unit comes sealed in the original Nissan packaging and is not a remanufactured or aftermarket substitute. The IAC valve plays an essential role in your engine’s idle air control system by regulating airflow bypassing the throttle body, allowing the ECU to fine-tune idle based on temperature and load.

Please note this unit is not compatible with RB20E single-cam engines—it's exclusively for dual overhead cam RB20 applications as found in the C33 Laurel. If you’re experiencing idle instability or hesitation, replacing this valve is a smart and effective step toward restoring proper engine function.

Trust Terra Firma Automotive to supply the rare and reliable parts your classic Nissan deserves. With our commitment to authenticity and performance, your C33 Laurel will continue to run as intended. Upgrade your idle control system today and enjoy smoother performance from your RB20-powered Laurel.

• Not For RB20E Single Cam Motors