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Jaguar
BCM repair

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BCM module repair
Jaguar

Plug and play repair within 48 hours

Jaguar BCM control unit repair at Techtronic

The BCM (Body Control Module), also called CJB or RJB depending on the model, is the control unit that manages the lighting, central locking, windows, alarm and communication with the immobiliser of your Jaguar. Its failure is a well-known classic — most often after water gets into the boot-mounted unit, a battery change or a jump start — and replacement at a main dealer is very expensive, VIN coding and key relearning included.

A faulty BCM can cause:

  • The vehicle no longer starting, or starting only intermittently;
  • The key no longer being recognised, with an immobiliser message on the instrument cluster;
  • Central door locking that no longer responds;
  • Windscreen wipers that operate on their own with the ignition off;
  • Electric windows and door mirrors that do not work;
  • A battery that drains overnight with no identifiable consumer;
  • An alarm that goes off for no reason;
  • Several control units that cannot be reached with a diagnostic tool.

Commonly found fault codes:
U0140 U0155 B1342 U3003

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Our repair: plug and play

We repair your original unit: it keeps its coding, its VIN and its synchronisation with the immobiliser. Once returned, you simply plug it back in and it works — no dealer visit, no key relearning.

  • Unit repaired and tested, returned within 48 hours
  • No coding needed on refitting
  • Anti-corrosion treatment in the event of water ingress
  • Send it by post from anywhere in France
  • We can also take in the complete vehicle at the workshop

Vehicles concerned

The BCM is fitted across the entire Jaguar range, under different names depending on the generation:

  • Jaguar XF (X250, X260): front CJB and boot-mounted RJB
  • Jaguar XJ (X350, X358, X351): front and rear units
  • Jaguar S-Type and X-Type: body electronics module
  • Jaguar XK / XKR (X150): CJB and RJB
  • Jaguar F-Type, F-Pace, E-Pace: BCM

Not sure about your model? Send us the reference printed on the unit and the fault codes you have read: we will confirm that we can handle it before you send anything.

Frequently asked questions

On Jaguars, the number one cause is water ingress: the rear unit housed in the boot becomes damp because of ageing light-cluster or tailgate seals, and corrosion attacks the circuit tracks. The other major group of faults comes from an electrical disturbance — a battery change, a jump start, a voltage drop — which corrupts the internal data. In both cases, the unit can be repaired.
No, that is the whole point of our repair: we work on your original unit, which keeps its coding, its VIN and its synchronisation with the immobiliser. It plugs straight back in as it is — plug and play, with no key relearning.
The unit is repaired, tested and sent back within 48 hours of arriving at the workshop. Cases of advanced corrosion may take a little longer: we will let you know before starting work.
Depending on the model and generation, it is located in the boot under the floor, near the spare wheel well, or behind the dashboard on the driver's side. Your garage can remove it quickly. Then follow our shipping procedure, which you can download at the top of the page. We can also take in the complete vehicle at our workshop in Boulleville.
This is strongly discouraged: depending on the fault, you may lose your lights, indicators or windscreen wipers, or find yourself stranded and unable to restart, and the vehicle will fail its roadworthiness test. Have it repaired without delay.
A new unit arrives blank: it has to be coded to the VIN at an approved workshop and the keys have to be relearned, which adds considerably to the bill. A repair keeps all of this data. And if the fault comes from water ingress, replacing the unit without fixing the leak means paying for the same fault again a few months later — we always tell you the cause we have found.

‹ All our automotive electronics repairs

TECHTRONIC is located between:

Caen / Rouen and Le havre

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