Had the TC/ABS/DSC lights come on the M3 today. INPA said that it was rear right wheel speed sensor, and I could see all the other wheels reporting their speed correctly, whereas the O/S/R was constantly.showing "0.0km/h". So I whipped the wheel off and had a look. The first challenge was the stupid allen headed bolt holding the sensor in place. What moron thought it'd be a good idea to put a small allen headed bolt in a place that is that exposed to the elements? Naturally it was rusty and the allen key rounded straight away so I had to hammer a 9mm socket onto it and impact wrench it out. On looking at the sensor, it was clear that something had got in between it and the ABS ring because there was a big cut through the plastic.
I knew new speed sensors were £80 from BMW and £40 from an OEM supplier, but with something like this, I was happy to go used. eBay was my first port of call, and I quickly found a used Genuine BMW part for £12inc del and a new M5 15mm long allen bolt for £1. Not bad!
I knew new speed sensors were £80 from BMW and £40 from an OEM supplier, but with something like this, I was happy to go used. eBay was my first port of call, and I quickly found a used Genuine BMW part for £12inc del and a new M5 15mm long allen bolt for £1. Not bad!