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moritzbaumann1

Mini Countryman Brake Issue

I'm experiencing a concerning issue with my 2020 Mini Countryman. The gasoline model is displaying an error message in the speedometer accompanied by a noticeable reduction in braking effectiveness. Diagnostic tools have confirmed an error related to the brake booster pressure sensor. I suspect improper bleeding of the hydraulic brakes as the likely cause. Before I proceed further, I'd value your insights.

Summary of the thread

A 2020 Mini Countryman is experiencing a brake issue, with an error message on the speedometer and reduced braking effectiveness. Diagnostic tools identified a problem with the brake booster pressure sensor. The suspected cause is improper bleeding of the hydraulic brakes. The resolution involved replacing the faulty brake booster pressure sensor, which resolved the issue.

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4 comment(s)

majadrache5

I had a similar problem with my Countryman. Same error message and poor braking. Did you check the brake system? Maybe air got into the lines somehow?

moritzbaumann1 (community.author)

When you experienced this issue with your Countryman, did you also find a corresponding error stored in the error memory using diagnostic tools?

majadrache5

Yes, I did! It was the pressure sensor in the brake system. I think it's best to take it to a workshop.

moritzbaumann1 (community.author)

Confirmed resolution. The brake booster pressure sensor was indeed faulty. Repair cost was 90€. I appreciate your input, it put me on the right track.

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MINI

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COUNTRYMAN