Part number for S3 rear differential?

HertS3

Registered User
Strengthens my case that the part is inherently flawed, how can Audi claim it's sealed for life if there are air vents on the top?? It's not a sealed system.
Audi dealer blamed the independent garage I went to of accidentally draining the rear diff oil when they changed the Haldex oil!! Ridiculous.
 

oyvind_norway

New Member
I use a independent garage to fix it for me because Audi just want to sell me a new part. They also tell me that the only part I can use is 0CQ 525 010S...
 

HertS3

Registered User
Yes, I had an independent fit a used one I got on eBay from a breaker, Audi will just want to sell you the newest version, not sure about the price in Norway but in the UK it was around £3,500
 

HertS3

Registered User
Wow I bought one from a breaker for £380!
 

alpesh26

Registered User
What are the symptoms of a knackered diff? Something on my car is whining at 70mph but only when im on the throttle, I can't place where its coming from.

I have replaced the oil in the diff due to accidently draining it (don't laugh) when doing the haldex oil so I know there is definitely oil in there as it took a full litre to fill it.
 

HertS3

Registered User
LOL kudos for doing stuff yourself anyway!

My made a whooshing sound which seemed to get worse on the motorway, plus if you floor it from standstill it sort of wobbles, not take off straight away. The whining appears to be bits of metal shaving going through the diff. When it went completely it sounded like I was dragging a tin can behind me
 

alpesh26

Registered User
LOL kudos for doing stuff yourself anyway!

My made a whooshing sound which seemed to get worse on the motorway, plus if you floor it from standstill it sort of wobbles, not take off straight away. The whining appears to be bits of metal shaving going through the diff. When it went completely it sounded like I was dragging a tin can behind me
I said don't laugh!! :wink:

Was it making noise regardless of being on the throttle? I might try closing the exhaust valves and see if that helps with my issue
 

HertS3

Registered User
I found that you could hear the noise best when off the throttle though presumably it made the noise all the time, don't laugh but I'd just put winter tyres on (first time I'd had some) and thought that the noise was coming from them!!
 

PrivateRy4n

New Member
My RS3 diff has gone and the part number from audi is ACR 525 010S but i have found a similar one 0CQ 525 010C, will this diff fit and be okay? what is the difference
 

jamal1

New Member
Mine has a rumbling sound that increases/decreases with speed, is it too far gone when this happens and needs to be replaced? Never had to deal with a problem like this before
 

HertS3

Registered User
Mine has a rumbling sound that increases/decreases with speed, is it too far gone when this happens and needs to be replaced? Never had to deal with a problem like this before
Could be, I'd get it checked out pronto
 
Top