I am only aware of the repair costs...............
That said a call to the Audi dealer (assuming its been serviced within the Audi franchise all its life?) should reveal if its had the problem and been repaired by a garage in the Audi franchise ( Audi keep computerised service and repair records).
Other than that the only way to be sure of whats going on would be to have the sump dropped off and to have the assembly inspected by a knowlegable mechanic who knows what he is looking for.
Good luck .
Spoke to Audi UK customers services today very pleasent lady named Gemma or was it Jade spoke to me. I voiced my concerns and gave her my reg number etc also told her it was a BRE engine number. She confirmed my oil pump was chain driven and not gear no oil pump work or associated problems had been carried out by any Audi dealer, and that none had been reported concerning my particular car as in mine! she then said and I quote
"THE PROBLEMS WITH THE OIL PUMP FAILURE WERE CHASSIS SPECIFIC AND THAT MY CAR WASN'T INCLUDED IN THOSE CARS WITH A PROBLEM,SO I SHOULDN'T BE WORRIED BUT IF I WAS CONCERNED I COULD TAKE IT TO AN AUDI CENTRE AND THEY WOULD ADVISE ME FURTHER"
So just to clarify and I've read almost all of this thread now the BRE could have has had oil pump failures which are diffrent to the BLB failures. The BRE failures are due to the hex shaft coming loose in its housing meaning the gear which it drives fails to turn and so fails to deliver oil to the various parts that need it.
The solution is to have a new / modified hex shaft ie 7mm Allen key! or similar and new gear fitted to remedy any possible chance of failure.
If so can anyone post a link to either an ebay seller provinding this service or another source.
Finally
To explain my paranoia the A6 is my third car in 6 months the oil pump on my Accord failed, knackered engine result sold for spare or repair then i bought a V70 D5 which was written off a couple of weeks ago due to a flood which caused hydrolock.
So i hope this gives some explanation as to my concerns. I just could not afford another car to be written off due to catasrophic engine failure over something that could be prevented for comparably little money.
Cheers