cordsig79

Kind of new issue not well documented here. Was getting PSM failure and 4 wheel drive faulty errors plus Cardan vibration.

Put it on charger to verify it wasn’t the battery, fiddled with the motor by disconnecting ave reconnecting. Reset the Transmission ECU via icarscan.

Decided to make a gamble to replace the servo motor by some of the reading on here....
eBay part
Transfer Case Box Motor For VW Touareg Porsche Cayenne
0AD341601A
95562460100

i went with A vs C to mitigate the ECU change.



Runs and corners excellent and for a year it’s been degraded driving much more than I realized.

cheap part for allot of fun in VirusLand

Adam Williams

hello. did you know? Really often problem with damaged wiring. You should check it before replace the motor.

jbaker136

What is the ECU change requirement you reference? Do you have more info or a link to a thread on the topic? Thanks

Jeff

cordsig79

There’s a nuance to changing servo motors. Earlier models had A type and A program. Later models had C and C type programming.

if you had an A go out and went and bought C, you’d be forced to upgrade the ECU.

https://rennlist.com/forums/cayenne-...l#post12488860

jbaker136

Thanks for the quick reply. I am reading the other thread as saying some people put in a C motor and leave to 2004 MY controller and have no issues. Other say to only change the controller if the new motor still leaves you with issues. Guess I can give a "C" motor a try and if I have issues, replace the control unit as well.

J'sWorld

I replaced my A with a C and had no issues. Did not change the control unit.