FuelTech Bosch LSU 4.2 Wideband O2 Sensor

The Bosch LSU 4.2 Wideband O2 Sensor is a high-precision oxygen sensor designed to deliver accurate air-fuel ratio measurements in real time, allowing the ECU to optimize engine performance, efficiency, and fuel consumption.

Technical Specifications:

• Model: Bosch LSU 4.2
• Part Number: 0 258 007 057 (VW: 021-906-262-B)
• Thread Size: M18 x 1.5
• Length (sensor tip to connector): 75 cm
• Warranty: 3 months from purchase date (with invoice)

Fuel Compatibility:

• Compatible with: unleaded gasoline, ethanol-gasoline blends, methanol, and diesel.
• Not recommended for: leaded fuels, diesel engines, or 2-stroke engines – these significantly reduce sensor lifespan.

Controller Compatibility:
Must be used with a wideband O2 signal conditioner for proper calibration. Compatible with the following FuelTech controllers:

• NanoPRO
• WB-O2 Nano
• Alcohol-O2
• WB-O2 Slim
• WB-O2 Datalogger

Important Notes:

• Handle with care and never disconnect the sensor during operation.
• For optimal performance, pair with a FuelTech wideband O2 controller for automatic calibration.