bcm repair

Vauxhall BCM Faults | Repair | Bench Test

Vauxhall Astra & Corsa BCM Repair Guide (With Bench Test, Repairs & Cloning Services)

If your Vauxhall Astra or Corsa is showing electrical faults, there’s a high chance the Body Control Module (BCM) is failing. The BCM controls central locking, interior lights, wipers, dashboard warnings, immobiliser functions and many other key electrical systems. When it starts to fail, the vehicle can develop multiple intermittent faults.

The Vehicle Check provides BCM bench testing, communication (COMMS) testing, professional repairs and BCM cloning services for Astra and Corsa models. If DIY repair isn’t for you, we can diagnose, repair or clone your module quickly and affordably.

Common BCM Failure Symptoms (Astra & Corsa)

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  • Central locking not operating correctly

  • Dashboard warning lights staying on or flickering

  • Wipers, lights, or windows behaving erratically

  • Car not starting even with a good battery

  • Random electrical issues caused by corrosion or water ingress

Tools Needed for BCM Testing & Repair

  • OBD2 diagnostic scanner

  • Trim removal tools

  • Soldering kit

  • Multimeter

  • Isopropyl alcohol

  • Replacement electronic components

Step-by-Step: How to Repair a Vauxhall Astra / Corsa BCM

A shortened, SEO-friendly version:

1. Confirm BCM Faults With Diagnostics

Scan for BCM-related error codes using an OBD2 tool.

2. Disconnect the Battery

Always remove the negative terminal before handling the BCM.

3. Remove the BCM Unit

Located near the interior fuse box. Remove trim, disconnect plugs and remove the module.

4. Open & Inspect the BCM

Check for water damage, corrosion, burnt components or cracked solder joints.

5. Clean & Repair the PCB

  • Clean corrosion with isopropyl alcohol

  • Reflow damaged solder joints

  • Replace burnt components

  • Ensure board is fully dry before closing

6. Refit & Test

Reinstall the BCM, clear fault codes and test all functions.

When to Use a Professional BCM Service

If you’re not confident with electronics or soldering, it’s safer to send the module to a specialist.
The Vehicle Check offers:

  • BCM bench tests & comms testing

  • BCM repairs and component replacement

  • BCM cloning / data transfer

  • Fast trade & retail turnaround

This allows you to avoid costly dealer replacements and resolve immobiliser, central locking and body control faults quickly.

Contact The Vehicle Check

The Vehicle Check
0203 489 261

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