Key Not Recognised

The car reports that it cannot detect or accept a key. A report, not a diagnosis — key battery, interference, vehicle voltage, a key antenna, its wiring or the access module itself all produce it.

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.

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Components

• CAS3 Module

Engines

• N18 1.6L Turbo

Models

• R56 MINI Cooper S

Repairs by System

• Electrical
• DME
• Immobiliser
• Programming
• Starting Problems

Procedures

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