ISN Synchronisation

Making the protected immobiliser identifier shared between the access module and the DME agree after a module change. Without it a replacement CAS can communicate normally and still authorise nothing.

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 →

Components

• CAS3 Module

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