BMW X4 and X3 recall: Pistons in rear brake calipers may not be coated to specifications
- What's wrong
- The fault affects the brake system in particular the brake calipers on the rear axle. Because of a faulty coating hydrogen gas (approximately 10 ml) could be created in the coating of the piston of the brake caliper. This will be completely outgassed during the…
- What to do
- Contact a BMW dealer to book the free repair. On the affected vehicles the brake system will be bled.
What’s wrong
The fault affects the brake system in particular the brake calipers on the rear axle. Because of a faulty coating hydrogen gas (approximately 10 ml) could be created in the coating of the piston of the brake caliper. This will be completely outgassed during the first 2 months after the production process causing longer brake pedal travel. Under certain circumstances the relevant brake pressure cannot be build up in the rear brake circuit. As a result the brake force of the system may be reduced by up to 30%. The driver may feel a soft brake pedal and a reduction of the brake performance. In certain cases the rear brake circuit could fail leading to increased risk of an accident.
The fix
On the affected vehicles the brake system will be bled.
Vehicles affected
| Model | Built from | Built to | Vehicles |
|---|---|---|---|
| X4 | 16 Apr 2018 | 8 Jun 2018 | 1,032 |
| X3 | 16 Apr 2018 | 8 Jun 2018 | 1,032 |
How to check your vehicle
Use the official DVSA checker with your registration number to see if your exact vehicle is included. If it is, the manufacturer should have written to the registered keeper. The repair is free, even if you bought the vehicle second-hand.
Updated 10 August 2018. This page summarises an official notice. Details can change – always follow the official notice.