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2024 MINI COOPER SE
Electric•FWD•AUTOMATIC•ev
2 active safety recalls on this vehicle — view recalls
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Repairs0Labor314Torque4618Fluid5DTC1878Battery1Maintenance0Recalls2
CC-ID-406high severityChassis

Trailer Electric Brake Failed

on 2024 Mini Cooper SE Electric · FWD

What this code means

The trailer's electric brake system has failed or lost communication with the vehicle. This is raised by the trailer control module monitoring the brake output.

Symptoms

  • Reduced trailer braking
  • Warning shown when towing
  • Longer stopping distances

Common causes

  • Faulty trailer brake controller
  • Damaged trailer brake wiring
  • Corroded trailer connector
  • Failed trailer brake actuator

Diagnostic steps

  1. Check trailer brake controller output
  2. Inspect trailer wiring and connector
  3. Test trailer brake actuator resistance
  4. Scan trailer module for fault codes
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