Body Control Module (BCM)
The body control module controls comfort and convenience functions such as lights, locks, wipers and windows.
What is Body Control Module (BCM)?
It communicates with other units over the vehicle networks. Many cars combine it with the fuse box. When a new BCM is fitted it often needs to be coded or programmed to the car, including the keys and installed options.
How it works
The BCM reads switches and sensors and switches the outputs.
Why it matters for your car
BCM faults can cause odd electrical behaviour and battery drain. Water entering the car through blocked drains or leaking seals can damage the BCM if it sits low in the cabin.
Other terms
- Approach Angle
- Battery Module
- Brake Light Switch
- Bump Stop
- Camshaft Position Sensor
- Carbon Fibre Body Parts
- Carbon-ceramic Brakes
- Clearing Fault Codes
- CO₂ Emissions (G/km)
- DOHC (Double Overhead Camshaft)
- Engine Code
- EV Charging Adapter
- Keyless Start (Push-button Start)
- LIN Bus
- Load Securing
- MPV (People Carrier, Minivan)
- Paint Blistering (Rust Bubbles)
- Power Steering Warning Light
- Twin-turbo (Biturbo)
- Ventilated Seats (Cooled Seats)