Ok. Thats great then. I just take a look on some paperwork because I’m like the second driver, I’ve got the car from a dealership (not Audi) about 4 months  ago,and there’s lots of paperwork done at Audi by the first driver but nothing about this alternator but I’ve found an offboard diagnostic information system with lots of electrical faults, couple of papers actually ( I think there are all electrics faults of the car) first fault is like battery 48v(a6,c31)- charging fault all of the papers with those electrical faults are from the 3 dec 2024. Now I’m wondering if the dealership bought the car with this alternator issue and they replaced, because if they done that and they didn’t use an genuine Audi/w part I don’t think Audi will replace an aftermarket at no cost but I think the dealership will need to pay for it anyway if not they can get the car back. I’ll find out on Friday when I’m taking the car to Audi.

I just checked the part on my car:) seems like is the genuine part, got the W/AG on it. 

First time poster, but have read through the thread, and particular thanks to Mark2 for his efforts and information. 

I have had the dreaded Electrical Fault(s) occur at the weekend resulting in an AA recovery to my home address. After discovering the possibility of this BSG failure (which im assuming and hoping it is) is covered under the 7 year extended warranty, I have arranged for the car to be booked into Glasgow Audi for the diagnostics to be done. Here is my concern. I bought the car, an Audi Q8 2019 model in Dec24', however for the life of cannot find the docs supplied by the garage, therefore have no visibilty of the service history. I have registered the car on the MyAudi app, but its only showing on the service history section as being done in 2021. Im assuming since then, all other services have been carried out independently and not recorded. Will this have an impact on any claim on the BSG if the service history has not been historically done at Audi?

 

TIA for any feedback. 

Frankly what has a service history got to do with a known component failure. There have not been any service recalls fir this component so how can Audi suggest lack of service history is a problem?

You don’t need any service history done at Audi or anywhere else, there is an issue with this alternator ( a bad part) so Audi need to replace it( some of them are doing it and some Audi are just playing with customers money) or something like that

Audi haven’t refused anything at this point as it’s not yet been in for the diagnostic. I was slightly concerned at what I had read under the conditions of any warranty claim, that the service record for the car had to be up to date, and according to the MyAudi app, the last recorded service report was in 21’. 

Car manufacturers will clutch at any excuse, no matter how irrelevant, in an effort to avoid responsibility for guarantee work. If you can obtain written proof of servicing from whoever did it you will have a better chance with a possible claim.

On 7/22/2025 at 11:11 AM, cliffcoggin said:

Car manufacturers will clutch at any excuse, no matter how irrelevant, in an effort to avoid responsibility for guarantee work. If you can obtain written proof of servicing from whoever did it you will have a better chance with a possible claim.

100%

Last week, I experienced a serious issue with my car. It started with a "Electrical System Fault" warning on the dashboard following a failure of the stop-start system. I managed to drive about five miles before other systems began shutting down one by one. 

The next day, I was able to get to work with the electrical fault still showing. However, on the way home, the car began displaying multiple system failure messages before eventually shutting down completely. I contacted both the RAC and Audi. The RAC engineer charged the battery and connected a spare one, which allowed me to drive the car to the nearest Audi service centre, about four miles away.

At the dealership, I was told that a diagnostic check would be performed  and I would be contacted with the results. A few hours later, I received a call informing me that the issue was a faulty starter generator. Since my car is seven months out of warranty, I was told I would need to cover the full cost of the repair — £3,411.31. 

I mentioned the recall listed on the government website and the 7-year extended warranty for the starter generator, but the representative didn’t seem interested. I then asked to speak with the manager, explained the situation again, and informed him that I had a copy of the extended warranty and the relevant TSB. I also requested that the quotation and the reason for denying the warranty be sent to me in writing.

Shortly after ending the call, I received another call from the branch manager, who apologized and admitted there had been a mistake. He confirmed that they were aware of the issue and would honour the 7-year extended warranty. The part has been ordered, and I was told I should have my car back within a week. I'm expecting to pick the car up tomorrow.

Car Audi A7 50 TDI Quattro 2019, Milage on the car -40.567 miles

If not for this forum, I would probably have ended up paying for the full repair and diagnostics — so thank you, audiowners.com. 

Edited July 24, 2025Jul 24 by brt286

Looks like dealerships are still under instruction to deny all knowledge of any extended warranty unless drivers have their own proof. Nothing has changed in the year since I ground to a halt in live traffic and had to be recovered in my own car as the door couldn't be opened from the inside. There should have been an official recall to help prevent drivers breaking down in dangerous locations. Fortunately the DVSA declared there is no safety issue and nobody is at any risk.

Anybody suffering from recalcitrant dealers in this matter should note Bartosz's comments and show them to their dealer. The more evidence of the fault being corrected under warranty, the more pressure can be applied to Audi and its dealers.

I just drop my car to Audi Bath an hour ago, tomorrow I should get an answer from them. I’ll let you know what’s happening and if they hopefully  play the game. @brt286 great that you manage to get you car fixed with no cost.

14 hours ago, Audi Death Trap said:

Looks like dealerships are still under instruction to deny all knowledge of any extended warranty unless drivers have their own proof. Nothing has changed in the year since I ground to a halt in live traffic and had to be recovered in my own car as the door couldn't be opened from the inside. There should have been an official recall to help prevent drivers breaking down in dangerous locations. Fortunately the DVSA declared there is no safety issue and nobody is at any risk.

Audi UK are in cost limitation mode and (some of) the dealers find it easier not to have to battle with them to get paid for the work they do. Jumping through hoops when it's obvious that a *failing* rather than failed BSG is the issue. Eg. Checking earth connections, checking wiring (not covered!) Etc.

The DVSA issue smacks of them being 'in cohoots'. The response you got re the lack of a red alternator warning light if not charging was very legally instructed in my view.

On 7/24/2025 at 9:05 AM, brt286 said:

Last week, I experienced a serious issue with my car. It started with a "Electrical System Fault" warning on the dashboard following a failure of the stop-start system. I managed to drive about five miles before other systems began shutting down one by one. 

The next day, I was able to get to work with the electrical fault still showing. However, on the way home, the car began displaying multiple system failure messages before eventually shutting down completely. I contacted both the RAC and Audi. The RAC engineer charged the battery and connected a spare one, which allowed me to drive the car to the nearest Audi service centre, about four miles away.

At the dealership, I was told that a diagnostic check would be performed  and I would be contacted with the results. A few hours later, I received a call informing me that the issue was a faulty starter generator. Since my car is seven months out of warranty, I was told I would need to cover the full cost of the repair — £3,411.31. 

I mentioned the recall listed on the government website and the 7-year extended warranty for the starter generator, but the representative didn’t seem interested. I then asked to speak with the manager, explained the situation again, and informed him that I had a copy of the extended warranty and the relevant TSB. I also requested that the quotation and the reason for denying the warranty be sent to me in writing.

Shortly after ending the call, I received another call from the branch manager, who apologized and admitted there had been a mistake. He confirmed that they were aware of the issue and would honour the 7-year extended warranty. The part has been ordered, and I was told I should have my car back within a week. I'm expecting to pick the car up tomorrow.

Car Audi A7 50 TDI Quattro 2019, Milage on the car -40.567 miles

If not for this forum, I would probably have ended up paying for the full repair and diagnostics — so thank you, audiowners.com. 

Hi mate, out of curiosity, did the dealership at any time ask/request details of the service history of the car?

An update of my car. They called me in the morning saying that they found an fail with the 48V battery and they reset the battery and need to test it mre( driving) to see what’s going on, they found the ad blue off but I play the  ( I’ve got no ideea but I don’t mind, so just leave it like that) . Anyway they called me about 5 min ago saying that they drive the car and the battery fault coming back on dash bord and all those electric failures and they done and software update and now everything is fine and I can pick up the car. I’ve asked if they tested that alternator and they said that the alternator is fine. Tomorrow I’m picking up the car. Hopefully I manage to drive it back home but I don’t think so, I think it will happen again and I think they are trying to avoid replacing that alternator.

I think the 48V battery issue is due to the battery self disconnecting to protect itself from a deep-discharge. This could very likely happen when there on nil or little charge from the BSG. I reckon there is a good chance the root-cause is still a BSG issue. You’ll soon find out if it happens again.

I was thinking the same thing,( that the 48v battery is going on a safe mode or something like that)but I’m like wondering why  they said that they tested the alternator and it’s charging fine( or they are lying) but if they do that it will be back on the dash board tomorrow when I’ll drive the car from Bath to Bristol. But I’m sure they are just trying to avoid replacing that alternator. And I’m paying for new software, testing the car and resetting the 48v battery £522

Btw, an overcharge of the 48v battery can cause the alternator stop charging?

Hi Danygeorge

it will be interesting to find out. I hope your issue has been fixed now. If not, and the BSG needs changing, I think they should refund what you have paid. It won’t be your fault if they have run up a blind alley.

Anyhow - hope it is fixed and you don’t need to spend any further time on this.

Hi guys. I’ve collected my car yesterday from Bath Audi. It’s seems like everything it’s fine for the moment, I’ve done like 100 miles yesterday so see if that battery lights is coming up and nothing, all good, it’s seems like they blame the adblue off tune in a way or other. I’ll add a picture of the invoice of what they’ve done.

Did they check the BSG is charging the battery, if not why not?

Yeah, they checked the BSG and it’s charging, I’ve drove the car yesterday and today so I assume it’s charging 😅

@Mark2 Shaun Collins said in a video posted to me that . They had 2 cars with the same issues like mine and they couldn’t find the exact reason why was happening this thing with the battery not being charged. But it’s seems like that BSG it’s charging for the moment.

https://video.citnow.com/vtsRM5Pdq_8