cliffcoggin

A dying battery can cause all those symptoms so the first thing to do is get tested professionally, not a multimeter voltage reading. If a new battery is needed get it coded to the car. Only after proving the power supply is sound is it worth investigating any remaining symptoms.

Do please let us know the outcome.

If the Audi dealer found no faults at the first diagnosis how much reliance can you place on his second attempt? Then there is AI which has given you a list of possible faults, but no certainties. Are you going to spend money on that basis? I suggest you find an independent VAG specialist who can test the car with a decent code reader such as VCDS, and let him do the diagnosis before committing to any expenditure.

You can leave if you want, but the topic will remain intact for the benefit of other members.

Mike. Read the whole of this topic, then tell us if you are still going to buy the car. https://www.audiownersclub.com/forums/topic/24906-alternator-failure-related-to-mild-hybrid-system

John you are not the first, and will not be the last, owner to discover that Audi's reputation as a reliable prestige brand went down the pan a decade ago. Engineers have been replaced by bean counters and mucketeers.

Could the answer be as simple as inverting either the disc or the wheel?

Thank you.

Would you publish the source for the new impellor for the benefit of the forum please?

Well done. Have you found a new replacement, or will you have to repair the broken impellor?

Stuart what is the point of asking a question on the forum if you don't return to read the replies?

Well done.

It is possible that a single switch serves both low and high functions.

Rightly so. A bunch of villains in my opinion.

Naveed. Photos of dried coolant are not helpful in diagnosis; you need to examine the engine bay while the engine is still hot and running to look for wet marks. The most likely source is the reservoir cap. Is it screwed on firmly? Is it damaged?

Was the above helpful to you Gemini? I see you visited the forum eight hours ago so you must have seen it.

It doesn't pay to rush things.

Sadly Audi is no longer the prestige brand it once was. You would be better off with a Ford nowadays.

Sorry to hear you have become a member of the unfortunate club upon which Audi has turned its back.

The ability of a battery to crank and fire the engine is not evidence that it is in good shape. That was true years ago in the days of points in distributors, but not since the advent of sensitive electronics. I suggest you get the battery properly tested (not by a multimeter). I'd go further and say that if it is more than five years old you should renew it irrespective of the test results. Don't forget to get the new battery coded to the car.

What does that mean? Have you had it professionally tested?

Did you also have a new oil filter? If so the lack of oil pressure suggests worn bearings. What is the mileage? Does it have a full service history? Is the engine losing oil or making smoke?

Enough! I am locking this topic as the discussion is going into dangerous territory. Clifford Coggin.

Take it to an Audi dealer, pay him lots of money, repeat every year.

Please do.