I literally called my VW service (Muller VW in Highland Park, IL) yesterday and it took a solid 15 minutes of discussion with the service rep before I got them to read a service bulletin that states to change the fluid. They quoted me $180 plus the fluid, which makes me believe they don't have it and now I'm calling them to confirm they have the fluid before I go in.I would like to add to the comment that many dealers are not familiar with the need to replace the differential fluid. I took my 2016 to be serviced last September and the Service Manager remarked I was only the second person who requested a fluid change. The dealer had to reschedule my appointment not once but twice because they did not have the specific fluid in stock and it was two and a half months later before it was eventually serviced. Total cost was $246.00
From the first page..So just how often should the fluid be changed? Mine has a little over 80k, and I didn't know about the VAQ needing serviced. Oops.
What about servicing etc. for the FDL unit?
Many VW dealers do not read the information that VAG HQ make available. This forum & others have numerous members who have gone to the dealers & asked about servicing the FDL unit, & have usually been given incorrect information or met with blank stares. Since 2013, in both the VW self study guides & official workshop repair manuals, it has clearly stated that:- “The oil should be changed every 3 years regardless of the mileage”. The total quantity of oil in the FDL unit is 570ml +/– 30ml, the “change” quantity is approximately 0.4lt.
The electric pump which pumps the oil has had numerous failures, across all VAG brands & both applications, (FDL & AWD) as it’s the same pump part. This pump made for the Gen.V Borg Warner units might have just had a bad manufacturing batch, or a more serious design issue. It appears to be costing about £350 to fix if out of warranty.