Engine bay fuse box (BSM) relay failure
SeriousElectrics & ElectronicsThe under-bonnet engine fuse and relay box (BSM) suffers from moisture ingress and internal relay burnout. Faulty connections lead to intermittent stalling, loss of headlight or wiper operation, or sudden limp-home mode with antipollution warning messages.
Sudden engine cut-out while driving, Car cranks but refuses to fire intermittently, Headlamps or windscreen wipers fail to turn on, Limp mode accompanied by Antipollution Fault warning
- Inspect the engine bay fuse box casing for water ingress or corrosion on harness plugs
- Test all electrical functions including wipers, headlamps and horn from cold
- Scan for communication and power supply fault codes across BSM and BSI modules