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      02-23-2017, 04:08 AM   #1
jonfon26mk
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Drives: 330d touring
Join Date: Jan 2014
Location: Milton Keynes

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M135i 2013 - Brakes coming on every 30 secs in WET!

Hey all,

I recently purchased a 2013 M135i with 14k miles on the clock. I absolutely love the car so far! However...

When it rains, the car decides to apply the brakes roughly every 30 seconds on its own. I wondered if this was just the brake drying feature they have, but from what I have read, that feature is supposed to be "un-noticeable" Mine is DEFINITELY noticeable and slows the car by over 5mph when on cruise control. Very frustrating when trying to regulate speed on the motorway! The brakes appear to bite for about 1-2 seconds at a time and during this time, the throttle is pointless.

The problem occurs with or without cruise control activated and happens in any of the driving modes (Eco/Comfort/sport). It even happens with the auto wipers turned off!

As soon as it's dry though, it's 100% fine.

Doe anyone know what this could be? I'm scared that it's something dangerous that is suddenly going to lock the brakes in the fast lane of a motorway, or something that's going to be un affordable to fix, like the hydro unit!

Any suggestions would be more than welcome!

Thanks,
Jonathan
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