BMW CAS 2 CAS Immobiliser Module Repair Car Access System Recovery / Repair Service


MotorTronics provides a prompt test and repair service for your CAS (Car Access System) Module, The module goes through various signal test and repair processes to ensure all parameters respond correctly, only after this, we pass the module and is ready for dispatch.

All that is left for you to do is;

1. Click Buy it Now / Add to Cart
2. Fill in the Order Form / Packaging Slip provided after the payment page.
3. Send your Original Module with the Order Form
4. Await Programming while we load the originals data to your new replacement.
5. Once received simply Plug it in and turn the key.
6. In some cases you will require diagnostics to adapt / clear codes.


BMW CAS Immobiliser

The CAS immobiliser module (transponder box) serves as an antitheft alarm system and enables the start of BMW vehicles. Within each vehicle key there is an integrated transponder chip, and a coil ring which is fitted around the ignition lock. The transponder chip is powered by this coil from the CAS module, meaning that no battery is necessary within the key. When your key is inserted in to the ignition, the transponder in the key is powered via the loop antenna, and key data is sent to the CAS control module. If the key data is correct, an enable signal is then sent to the starter and the CAS module then sends the random code to the Engine Control Module (DME / DDE) where the random code is checked against the saved random code. Only if they match, is the fuel injection released allowing the car to start.

Are you having ignition problems? Does your BMW vehicle not start? If so, this could be due to an issue with your CAS immobiliser module. Does your BMW vehicle not start? If so, this could be due to an issue with your CAS immobiliser module.

These units fails in many ways with the some listed below and commonly suffers from internal hardware and software failures resulting in intermittent to complete none start

  • Hardware damage causing no crank
  • Output circuit terminal 50 faulty
  • various fault codes relating with unit faulty
  • Corrupted software due to failed programming
  • Immobiliser Fault Codes
  • No Communication with CAS Module
  • Vehicle Won’t Start
  • Key Not Recognised
  • Failed CAS after key programming

Most workshops will advise to replace the immobiliser module because they are unable to repair it.

This repair service covers the test, repair  for this module, if you module is not repairable when we can reprogram a replacement unit with your immobiliser data, for this all you will need to do is supply the additional unit with the same part number.

Our specialised equipment allows us to fully recover the flash data and restore it back to its working condition, at MotorTronics , we’re able to fully test and repair the BMW CAS immobiliser module. All re-manufactured units are returned with warranty and will not require programming.

MotorTronics provides Programming or Cloning of BMW MINI CAS1, CAS2, CAS3, CAS3+, CAS4, CAS4+ module for the purpose of restoring CAS module to working state. Whether caused by failed module, programming fault or incorrect programming we can get you back on the road fast.

Give  MotorTronics  a call today on 02037739930