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Can anyone advise when the diff and gearbox oils need to be changed on the Audi service schedule? I gather the B7 was meant to be "sealed for life" but this proved unwise and I wondered if this was changed for the B8?

The reason I ask is that Fontain (in that video), suggest the front diff needs doing at 20k miles and the DSG / Centre and Rear diffs at 40k miles - but is there an override for age? i.e. If your car is 6 years old but hasn't hit 40k miles - would all of these need doing anyway?

First post of this thread pretty much covers everything

viewtopic.php?f=61&t=126617

If you can’t find a record of them being done best to change I would think

Both - very useful thanks!

As an aside - I didn't realise how much work needs doing at the 6 year point - no wonder people chop them in when you've got:
1. An inspection plus oil change.
2. Spark plug change.
3. DRC Oil change and re-pressurisation.
4. Brake fluid change.
5. Coolant change.
6. Aircon service.
7. Any mileage appropriate transmission oil changes (front diff, DSG, Centre Diff and rear diff).

Lots of £'s?

Yeh, it can be a bit hard on the wallet. I think the advice is always going to be 'whichever's soonest'...
That was my position last year, but managed to split it over several visits to the dealer, which softened the blow a bit. What with the lockdowns, I probably did less than 2k miles last year, so dread to think how much that worked out at £/mile. The dealer accidentally carried out a 150 point vehicle prep check, so I got that FOC, which was at least good for morale, and a worthwhile doc to keep with the service history.

MadMark wrote:Both - very useful thanks!

As an aside - I didn't realise how much work needs doing at the 6 year point - no wonder people chop them in when you've got:
1. An inspection plus oil change.
2. Spark plug change.
3. DRC Oil change and re-pressurisation.
4. Brake fluid change.
5. Coolant change.
6. Aircon service.
7. Any mileage appropriate transmission oil changes (front diff, DSG, Centre Diff and rear diff).

Lots of £'s?

The extra items on the 'good practice / reccomended' list seem pretty sensible but I'm not sure Audi dealers consistently propose them. Don't think air con has ever been done on my car or any other car I've had and has always blown ice cold.

DRC oil change is interesting too. Some folk say leave alone unless there is an issue but you'd think changing oil would be a good idea. Any other views / experiences on this. Given the system is expensive if it goes wrong I'm happy to do whatever is 'best'.

My car is just over 6 years old and I had a call from audi to book an MOT next month and they mentioned the brake fluid which is due in april but didn't mention DRC or air con hence wondering if these are essential or discretionary.


Good to hear from others on their experience/ advice.



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Get the Brake fluid checked after.

I had mine done during a service when I first bought the car (I do full fluid change on all cars) then had an inspection done by my favourite Indy (Auth Audi) he checked the brake fluid and it was old.

Took it back and Audi denied it even when presented with the results and then changed it reluctantly as "goodwill"

Marshall in Sydenham if you want to avoid it.

I changed all that the dealer recommended, - they didn't mention aircon or DRC fluid changes, just about every other fluid though which quickly adds up, plus air and pollen filters.

Ok - thanks for the advice guys - just pricing all of this up ....