Philc98

I had the parking brake light come on last week. It is strange because the parking brake still works perfectly. I have ran VAG Com and it shows that there is a hall effect sensor issue on the right side. I ran through all the tests in VAG open / close / test. Reset the pad thickness. Everything seems to be working properly but I cannot clear the light. Any thoughts would be appreciated.

Phil

Mister Bally

Verify all wiring is good (standard automotive electrical troubleshooting techniques-use the wiring diagram that is in the service manual). If so, consider replacing the defective Hall-Effect Sensor. This may mean the complete motor or calpier assembly.

dvs_dave

OP, did you not like the same answer the first time you asked?

https://www.audiworld.com/forums/a8-.../#post24707032

03_AR_CO

I have a working motor on my shelf in the garage here if interested. Let me know.

Philc98

I received minimal feedback as I posted within someone else's post that was somewhat unrelated so I thought I would get more input and valuable experience if it was in its own post.... but thanks for the sarcasm. Always helpful.

Phil

dvs_dave

No problem and you're welcome. Next time I'll hold off and wait for a couple of pages of "maybe this, maybe that" type posts before posting an actual solution....just the way you like it.

carl viking

I have followed the tips given on this board (and common sense) - used top notch contact cleaner / lubricant, bent connector pins a tiny bit to ensure tighter fit etc. Done the Ross-Tech process. Has worked fine for 4 months, was off and on before that (a few weeks at a time), usually corrected with wet weather. In the end - the good news is that I know it's the connector / motor - not the car wiring harness (which can fail for some).

Over time I will have to replace the caliper, but it's not cheap. And since prior owner painted it black, I have to do the same with replacement.

It's unclear to me if there is any correlation to age or mileage for this to fail. if not, a used caliper may actually be a smart move, as long as you can do the work yourself.

dvs_dave

You can buy the motor by itself (part no: 4E0998281B) or you certainly used to be able to. It's attached with a couple of torx bolts and is a very quick swap.

Even if it's no longer available without the caliper, I'd still just swap the motor over as a caliper change makes the job much more involved.

carl viking

That's excellent news - not sure how I missed that? $400 sure is a better price than the entire caliper.
Thank you!

rob1962

$100 aliexpress.com https://www.aliexpress.com/item/3296...27424c4dNTqaV3