Oil condition sensor

The oil condition sensor is attached to the oil sump and is accessible from below. On all new engine types, there is no longer a dipstick. These engines have an electronic oil level check.

Fig 1: Identifying Oil Condition Sensor Components

Courtesy of BMW OF NORTH AMERICA, INC.

The oil condition sensor is connected via a bit-serial data interface to the engine control system.

The voltage supply is dependent on the engine version (e.g. via terminal 87, terminal 15 or terminal 15N).

The following graphic shows by way of example the voltage supply via terminal 87.

Fig 2: Oil Condition Sensor - Circuit Diagram

Courtesy of BMW OF NORTH AMERICA, INC.