The off-side part number for the valve I bought is 4EO 399 151 DH
No point giving you the old part number as it has been superseded
The two letters at the end denote which side, DH being the off-side. The near side will be the same number but with 2 different letters at the end
If you can get the car in the air and remove the electrical connection and stick an ohm meter onto the terminals and get a reading to determine which one is faulty it will save you buying the wrong one.
I would suspect the near side valve will be a little trickier to change as the exhaust in beside it.
To change the valve I raised the car on a 4 post ramp, removed the gearbox under-tray loosened the valve top bolt which is an 8mm hex Allen Key, using a trolley jack and 4' piece of tubing I raised one side of the gearbox just enough to lift it off the valve, removed the 2 x 13mm bolts which hold the valve onto the crossmember. Fitting is reversal and all in it took about 15-20 minutes
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Nite Blue 3.0L SE Quattro
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