Reference Sensor
WARNING: This page is about a different car, the 1989 BMW 325is, 1989 BMW 325iX, and 1989 BMW 325i. However, it is still accessible from the selected car via links, so may be relevant.
The test terminals are 48 and 47. There are no test conditions. The correct test value should be 540 ohms resistance +/- 10 percent.