Brake master cylinder level sensor
Posted: Tue Apr 09, 2019 2:03 pm
Having discovered that the master cylinder cap plus level sensor is no longer available I set about making a cheap replacement. I had a quick look through brake level sensors on fleabay and decided that the 3 Series items ought to work. It?s a nice sealed switch unit using a magnetic float and reed switch. I purchased one for the grand total of ?3.50. It was very easy to pull apart and using some surplus PTFE stock I had, I turned up a simple adaptor. The switch is a tight interference fit into the PTFE so no seals are required there and a large silicone ?O? ring is used to seal between the adaptor and the body of the reservoir.