Oxygen Sensors

Oxygen Sensors: The N62 engine is fitted with a total of four oxygen sensors. One planar broadband oxygen sensor (constant characteristic curve), which regulates the fuel-air mixture, is located upstream (2) of each of the two catalytic converters. The catalytic converter assemblies are integral with the exhaust manifolds (1).




There is a post catalytic converter sensor (Bosch LSH25) for each cylinder bank positioned downstream of the catalytic converter (S) which monitors the catalyst efficiency.

This monitoring means that if the exhaust gas concentration is too high, a fault code is stored. The post catalyst sensors can also detect an emission relevant fault in a pre-catalyst oxygen sensor.