BMW CAS3 Immobiliser ECU Repairs The CAS3 immobiliser module (transponder box) is found fitted to BMW vehicles and is known for common faults like not allowing the vehicle to start. The CAS3 module can be a very expensive part to replace and will need programming to get it working. A common location for the immobiliser box is behind the pocket on the drivers side. If you're reading this page it's most likely because you suspect a fault with your BMW 5 Series…

BMW 1 Series CAS2 Repairs The BMW 1 series has a well known problem with the CAS2 Immobiliser system. The Immobiliser box can malfunction and cause starting issues. The Immobiliser box is most commonly located on the drivers side behind the pocket and a separate transponder near the key barrel / module. If you're experiencing problems with the BMW 1 Series Immobiliser system then you may already be aware how expensive this type of fault can become. Most workshops are…