If your vehicle is suffering from central locking failures, immobiliser warning lights, or unexpected electrical glitches, a failing Body Control Module (BCM / BSI) is very often the root cause.
At BCM Express, we specialise in supplying genuine OEM replacement modules—specifically part numbers 9819851380 and 9819851380-01—that have been professionally reset (virginised), bench-tested, and prepared ready to programme to your vehicle.
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What Does the BCM / BSI 9819851380 Do?
The Body Control Module (also known as the Body Systems Interface or BSI) acts as the central electronic computer managing your vehicle’s interior electronics, security networks, and convenience systems. Communicating over the CAN Bus network, it coordinates vital functions such as:
Remote key fob recognition & immobiliser communication
Central locking actuators
Electric window and door mirror operation
Interior, exterior, and dashboard lighting
Windscreen wiper timing & washing systems
Power management & battery conservation
When internal component failure, electrical short circuits, or water ingress damage the 9819851380 circuit board, several vehicle functions will typically stop working simultaneously.
Common Symptoms of a Faulty BCM 9819851380
If your original unit has suffered damage, you will likely encounter one or more of these common symptoms:
Non-Start / Immobiliser Active: The engine cranks but will not start, often displaying immobiliser warnings.
Key Fob Failure: The car fails to respond to remote central locking or keyless ignition.
Erratic Electrical Behaviour: Lights or wipers turning on independently, or windows becoming unresponsive.
Parasitic Battery Drain: The module fails to enter “sleep mode,” pulling power while the car is parked.
No Diagnostic Communication: Diagnostic scan tools report “No Communication with BSI” errors.
Why Choose a Reset BCM from BCM Express?
Standard used BCM units bought from scrap yards remain locked to the donor vehicle’s engine ECU and security coding. Attempting to fit a locked module will prevent your car from starting.
Every unit supplied by BCM Express goes through a rigorous preparation process:
100% Genuine OEM Hardware: Dependable original manufacturer components.
Virginised / Professionally Reset: All previous donor security data is completely wiped using specialist programmer tools.
Bench-Tested & Verified: Thoroughly tested to ensure full functional operation before dispatch.
Ready for Diagnostics: Prepared so your auto electrician can easily code it to your car using standard manufacturer-level diagnostic equipment (e.g., Diagbox, Autel, Snap-on).
Fast UK Dispatch: Sent via tracked courier to keep garage downtime as low as possible.
How to Confirm Compatibility Before Ordering
Matching exact part numbers is essential when buying replacement control units. This listing specifically covers part numbers:
9819851380
9819851380-01
💡 Unsure if this fits your vehicle?
Reach out to the BCM Express team before ordering! Send us your Vehicle Reg, VIN (Chassis Number), or a clear photo of your existing BCM label. We will gladly verify compatibility for you.
Frequently Asked Questions
Is this BCM plug-and-play?
No. Because the module handles vehicle security and immobiliser functions, it must be programmed to your specific vehicle using diagnostic equipment. However, because it has been professionally reset by us, any qualified technician or auto electrician can programme it seamlessly.
Is this a genuine OEM part?
Yes. We only source and reset original manufacturer control modules—never cheap aftermarket replicas.
Get Your Vehicle Back on the Road Today
Eliminate complex electrical faults with a reliable, bench-tested replacement module.
🛒 Click Here to Purchase Your Reset BCM 9819851380 / 9819851380-01 on eBay