Passat Memory Seat Motor Rebuild - Bosch 0130002652

[MIG]

Not sure how common this issue is but here's a guide on how to fix your seat motor memory.

My 2011 Passat driver's seat stopped remembering where it was and the easy entry function stopped working.

VCDS show the position sensor to be stuck at 65550

02340 - Seat Fore/Aft Adjustment Motor (V28
005 - No or Incorrect Basic Setting / Adaptation

I did not find many spares online, so I decided to pull the unit out and have a look.

The brushes and winding were in really good condition for the amount of moving my heavy backside all these years.



The resistance between the two senor leads was an open circuit, so I bent the tabs back and opened it up.
Once open, found a very simple circuit with one resistor and hall effect sensor.


No one has a stock of the original chip, due to the global shortage, but after digging through many datasheets I found a suitable replacement.

Element 14 - A1326LUA-T

All the specs for the hall effect sensor are the same, but the original was marked for automotive uses.



The new hall effect sensor came, soldered it in, resistance on the sensor pins now was 13.3K ohms.



Reinstalled the unit, ran the adaptation (Don't need diag tools for this) by running all the seat positions to their limits and holding the button for 5s.

You will get a bing noise once done,

Time to enjoy your easy entry again.

[Hillbilly]

Well interesting as I had the same problem and VW wanted $1013 for a new base with the controls in it .

BUT I remembered it had done the same when I had a flat battery so I charged the battery and it was perfect.

Had exactly the same symptoms as yours No voltage and open circuit etc.

Another thing if you have it sitting back beyond a certain point it also wont work. Found that out in my Tig and took it in and they showed me what it does or in my case didnt do so only had to pull it forwards an inch and all good now Hope you didnt do all that unecessarily

[MIG]

I tested the sensor out of the circuit with my multimeter, open on all leads.