[quote=michael320]
Its No.2 in that diagram, just check the underside of the master cylinder, if your car is a late model it will have two of those sensors. Both are the same part number.

Its not a huge job just a bit fiddly.
[/quote

Hi, I have a BMW 316i E90 N43 with exact same problem and 5E20 code. i cant seen to find the sensor part though on bmwfan.info, is my a full unit change or can i get sensors. Any help is greatly appreciated.thx