Wideband O2 Sensor only – Bosch LSU 4.2

Replacement Sensor for Legacy Systems

The Bosch LSU 4.2 Wideband O2 Sensor is the replacement sensor for older Haltech wideband controllers and many legacy aftermarket gauge systems. While the LSU 4.9 is the modern standard, many thousands of vehicles and dyno systems still rely on the robust LSU 4.2 architecture.

Connector Specifics

This unit is supplied pre-terminated with a female Deutsch DT-6 connector, specifically matching Haltech’s legacy wideband controller harnesses. This ensures a direct plug-in replacement without the need to cut and crimp the sensitive sensor wires, which utilize a calibrated resistor in the connector body.

Technical Specifications

Note: Not compatible with controllers designed for LSU 4.9 sensors. Please verify your controller model before ordering.