sootwagen

At 47,000 miles, I had the crankshaft pulley separate from the hub and throw the Serpentine belt.I was very fortunate; the pulley came off either as I was shutting the engine off or starting it up. I just don't understand how it could fail with so few miles on it.

cuatrokoop

Looks like corrosion played an issue helping the rubber separate from the hub.

gozman

Just got home after a trip from Ohio to Tennesee and mine failed as I went to move my Q7 after unpacking it from the trip; it started and as I turned into the driveway, the power steering stopped working and when I looked under the hood, I saw the belt loose and the pulley broken just like your is in your photos. It looks like you tackled it yourself; how much time did it take you to get it fixed? I have a post-TDi fix visit for warranty work with the local Audi dealer scheduled for an emissions error code just 83 miles after the fix was applied (NOx sensor errors) and was told there is a TSB and redesigned pulley being spec'ed and am hoping they'll cover the pulley failure too...

Boffee

[QUOTE=gozman;25333690]Just got home after a trip from Ohio to Tennesee and mine failed as I went to move my Q7 after unpacking it from the trip; it started and as I turned into the driveway, the power steering stopped working and when I looked under the hood, I saw the belt loose and the pulley broken just like your is in your photos. It looks like you tackled it yourself; how much time did it take you to get it fixed? I have a post-TDi fix visit for warranty work with the local Audi dealer scheduled for an emissions error code just 83 miles after the fix was applied (NOx sensor errors) and was told there is a TSB and redesigned pulley being spec'ed and am hoping they'll cover

Boffee

Does anyone have the torque value for the 8 bolts that hold on the crank pulley?

Ariesb21

Were you guys able to get it covered through warranty? The same just happened with my q7 tdi 2014 only while I was driving. Pulley snapped right off. Problem is most likely due to corrosion

Car at 89,000km so out of warranty period - took it to the dealer and hoping they will fix such a disaster for free

any thoughts ? Could something else have been damages too?

also do you think anything else could have been damages?

Built4Sin

This is a problem with the BMW diesels as well, the vibration dampener takes the engines torque abuse and ends up failing. The fix for BMW so far looks like throwing on an 'aftermarket' clutched alternator pully along with either a replacement dampener or Fluidampr redesigned (solid, viscus fluid filled) part, that helps in keeping down the strain that the rubber ends up deteriorating from.

Audi, seems to have a corrosion problem on their's as well, that's not seen on the BMW's though. (Mine is rusted out just like yours)

Links of failed BMW dampeners:

https://www.tunemyeuro.com/bmw-335d-...onic-balancer/
https://www.bimmerfest.com/forums/sh....php?t=1272400

Link for new part:
https://parts.audineworleans.com/p/A...9105251DJ.html

Rusl

hey guys, I got exactly the same problem (audi Q7 2012 TDI), where did you get it fixed and for how much? I just bought crank pulley and VBelt
Please let me know
Thanks in advance

addielac

Same crankshaft pulley failure on our 2012 Q7 TDI 45k miles yesterday, on the highway outside DC. Super fun doing that at 70mph 150 miles from home. Any news on whether its under the tdi warranty by chance or if there's anything we need to know getting it fixed? We had to leave it at a dealer down there to be fixed.

Built4Sin

I replaced mine last week after seeing your guys failures and mine looking corroded like yours. It was about $400 for the part and install (done at Audi, while having some emissions warranty work done).

It’s not covered by the TDI warranty, since it’s in no way emissions related. Just terrible parts design. Make sure you have them order the part and bolts from New Orleans Audi and have them price match (or order it yourself and have them install it).

It’s an investment worth the peace of mind, especially if you road trip!