front ABS sensors......ARRRGGGHHH!!

[Zip]

...would have loved for it to be a simple pull out job. No idea why mine are so seized compared to others. The bore into which the sensor slips is quite rough and corroded on the inside.

As I said, I had no choice but to take the dust guard off (which involves removing the disc) to allow me to get a pair of grips onto the metal part (where the allen grub screw goes through) without crushing the plastic of the sensor itself.

Sounds like you have just been lucky. Weird, 'cos my car has only done 76k miles.

Zip

[Mr K]

hmm, sounds like a right pain! I feel for you having spent an entire morning drilling out a pinch bolt the other day... why couldnt audi have used better metal / assembly lubricant.

[Duffy]

I stripped one of the same caliper retaining bolts on mine last week whilst doing discs and pads.
Drill the head off (I used a 10mm drill then stepped up through 1mm increments to 13mm) and then pull the caliper off, the screw came out by hand thereafter.

Time consuming but straightforward enough in the end.

[Zip]

Originally Posted by Duffy

I stripped one of the same caliper retaining bolts on mine last week whilst doing discs and pads.
Drill the head off (I used a 10mm drill then stepped up through 1mm increments to 13mm) and then pull the caliper off, the screw came out by hand thereafter.

Time consuming but straightforward enough in the end.

Sounds sensible. I was thinking of cutting a wacking great groove with a Dremel, but then I would need the mother of all screwdrivers!!!

[Duffy]

Drilling the head off is definitely easier...........

[ulfilias]

Ok....I'm with you, Zip all the way on the screaming....Mine will not come out and has broken the sensor inside the hole. Looks like it was a magnetic bar inside a white plastic sheath, inside a black plastic sheath. The Aluminium has exfoliated (Like rust, Aluminium does oxidise, particularly in the presence of water) and trapped the plastic shaft/sheath inside.

I am slowly chiseling away the plastic as i can't think of anything else to do. Maybe remove the drive shaft (*panic*) and push it out.....At this rate i can almost see me needing a new arm !!!

Irritatingly my elsawin is showing the old style for my car. Quite odd.

sensor seems to be 0 265 006579....Where is the part number ???

Ta,
Lee

[Zip]

Originally Posted by ulfilias

Ok....I'm with you, Zip all the way on the screaming....Mine will not come out and has broken the sensor inside the hole. Looks like it was a magnetic bar inside a white plastic sheath, inside a black plastic sheath. The Aluminium has exfoliated (Like rust, Aluminium does oxidise, particularly in the presence of water) and trapped the plastic shaft/sheath inside.

I am slowly chiseling away the plastic as i can't think of anything else to do. Maybe remove the drive shaft (*panic*) and push it out.....At this rate i can almost see me needing a new arm !!!

I recognise the "exfoliating".... bit like layers off an onion peeling off in the hole. I was loathed to clean it out too rigorously in case I left a load more swarf in there.

Apparently replacing is a right royal PITA, as the cable runs back to the control unit are a nightmare to trace. Someone on audipages has soldered on new sensors to existing cables....do a search.

Hope I never have to touch the little f***ers ever again... and all that for the TINIEST little bit of black plastic that was caught on the end of the sensor corrupting the readings. I suspect a compressed air hose into one of the wheel bolt holes would have been just as effective...

Still got to drill out that caliper bolt though....arrrggh.

Zip