JHZR2
Staff member
I'm a bit annoyed, but my BMW ABS sensor seems to be busted.
Speedometer had a glitch, then got an ABS light. Went away when I turned the car off and restarted. Showed up about 190 miles later. Codes indicate left rear.
Got an OEM part, ready to do it. $40 or so.
An online DIY shows it's just held in with a single screw. Not much to it. But it's stated to coat with a long life grease.
That means that whatever I remove also had a long life grease.
Ive never replaced a sensor before. I'm not that concerned, but I seem to recall that the abs sensor magnets on a hub should never be touched, and that contact with them or getting dirt on them can cause them to not work. That may not be true or lost in translation/my memory.
So what should I use to clean the spot wher the sensor is mounted? Paper, popsicle stick, screwdriver, etc? Are chemicals Ok? Can you go too deep and damage the hub, magnets, bearings, etc?
Once clean, I'll coat the sensor lightly and install. How much is too much? Coat the whole thing or just the sensor shaft or top (I.e. Use the grease more as anti seize or anti-rust at the top?).
Is dielectric grease ok for the other end?
DIY that's very similar:
https://www.pelicanparts.com/BMW/techart...Replacement.htm
Thanks!
Speedometer had a glitch, then got an ABS light. Went away when I turned the car off and restarted. Showed up about 190 miles later. Codes indicate left rear.
Got an OEM part, ready to do it. $40 or so.
An online DIY shows it's just held in with a single screw. Not much to it. But it's stated to coat with a long life grease.
That means that whatever I remove also had a long life grease.
Ive never replaced a sensor before. I'm not that concerned, but I seem to recall that the abs sensor magnets on a hub should never be touched, and that contact with them or getting dirt on them can cause them to not work. That may not be true or lost in translation/my memory.
So what should I use to clean the spot wher the sensor is mounted? Paper, popsicle stick, screwdriver, etc? Are chemicals Ok? Can you go too deep and damage the hub, magnets, bearings, etc?
Once clean, I'll coat the sensor lightly and install. How much is too much? Coat the whole thing or just the sensor shaft or top (I.e. Use the grease more as anti seize or anti-rust at the top?).
Is dielectric grease ok for the other end?
DIY that's very similar:
https://www.pelicanparts.com/BMW/techart...Replacement.htm
Thanks!