Bosch Oxygen Sensors

The MS43.0 system uses Bosch LSH 25 oxygen sensors that function basically the same as previously used (in Bosch systems). The voltage range is between 0-800 mV.

Fig 1: Identifying Pre 02 Sensor

PRE 02 SENSOR 

Fig 2: Identifying Post 02 Sensor

POST 02 SENSOR 

The location remains the same with the pre-cat sensors are mounted on top of the exhaust manifolds. The catalysts are now integral with the exhaust manifolds (further detailed in the M52 TU engine section).

Fig 3: Identifying Post Catalyst Sensors