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.
Body Basic Module (KBM): Notes
The body basic module (KBM) receives all the information that is required for operation of the wipe/wash system.
The body base module activates the following components:
- Dual relay module for the wiper motor
- Relay for the headlight cleaning system
- Washer fluid pump
The KBM also controls the wash/wipe system on the Touring (E61) which also includes the wash/wipe system for the rear window).
The body basic module is connected via the K-CAN and communicates with the:
- Safety and gateway module (SGM)
- Rain-light sensor (RLS)
- Integrated automatic heating and air conditioning system (IHKA)
The following systems are outputs/actuators of the wiper/washer system:
NO RELATED
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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.