Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Structure and inner electrical connection
The oil condition sensor is connected via a bit-serial data interface to the engine control system.
The electronic monitoring circuitry is completely contained within the electronic component and employs capacitance measurement to operate.
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.
| Item | Explanation |
|---|---|
| 1 | Capacitor 1 |
| 2 | Capacitor 2 |
| 3 | Temperature sensor |
| 4 | Electronic component with evaluation electronics |
| Pin | Explanation |
|---|---|
| BSD | Bit-serial data interface |
| Terminal 31L | Load ground |
| Terminal 87 | Battery voltage with ignition ON |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.