Bosch LSU 4.2 Wideband O2 Sensor

The Bosch LSU 4.2 Wideband O2 Sensor supports closed loop O2 maintaining optimal fuel delivery by delivering accurate measurements of the engine's air-fuel ratio to the ECU in real-time, determining the lambda value. 

Fuel Compatibility:
The Bosch LSU 4.2 WB-O2 sensor is compatible with unleaded gasoline, ethanol gasoline blends, methanol, and diesel. However, the sensor's lifespan is significantly reduced when used with leaded fuel, diesel, or in 2-stroke engines. 

Thread Size:
The Bosch LSU 4.2 sensor has a thread size of M18 x 1.51.

Part Number: 0 258 007 057 (VW Number: 021-906-262-B)2.