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.

Additional Information:
Remember to handle wideband O2 sensors with care and never remove the O2 sensor connector during operation.

Installation and Calibration:
To operate the sensor effectively, it must be paired with a wideband O2 signal conditioner (also referred to as a wideband O2 controller). When paired with a FuelTech wideband O2 sensor controller, the sensor is automatically calibrated. 

Compatible Wideband O2 Sensor Controllers:

• NanoPRO
• WB-O2 Nano
• Wideband O2 Weld Bung
• Bosch 4.2 WB-O2 Sensor Plug Kit