CAS3 Module

The Car Access System on R55–R61 MINIs: key recognition, terminal and power-mode control, start-request processing and the protected immobiliser exchange with the DME. Replacing one is security work, not a parts swap.

Documented repairs

MINI Cooper S CAS Replacement: Immobiliser, DME and ISN

2010 MINI Cooper S (R56, N18 1.6L Turbo)

Advanced case study on CAS immobiliser replacement for a 2010 MINI Cooper S (R56) — why the DME and ISN matter, and why a used CAS is never plug-and-play.

Read the diagnosis →

Engines

• N18 1.6L Turbo

Models

• R56 MINI Cooper S

Repairs by System

• Electrical
• DME
• Immobiliser
• Programming
• Starting Problems

Symptoms

• No Start
• Key Not Recognised
• Start Authorisation Denied

Procedures

• Fault Code Scan
• Immobiliser Status Scan
• Key Programming
• Battery Test
• CAS Data Read
• CAS Data Write-Back