I have the same issue with my car - lots of clicking HVAC servo motors. To the point that VCDS doesn't want to calibrate any of it.
I stripped one to see the condition of the gears, and as expected they are pretty worn.
I can see plenty secondhand units for sale, but given teh age of the car I'm assuming I'll be spending money on parts that are essentially in a simillar condition, or near to starting to fail.
To that end I bought what I hoped wa the solution, but isn't. Same part number but different suffix (ie not an 'A').
Sadly not a direct swap..
The output shaft is the same, and the plug is the same.
My question is whether this unit would work if I overcame the fittment issue. It looks like I could simply make an adapter plate to pick up the different mounting holes.
Does anyone have any experience of this or better ideas to get a long term fix?
Cheers,
Brian