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ECU downgrade issues

Followers

September 12, 20232 yr

Hi , I have an a7 from 2015 (315hp)and I wanted to disable the ad blue system which was causing problems. I went to guy and he disable the ad blue to not show on the dashboard anymore but to do this he changed my ECU to a 2013 A7 (313hp). He told me that the ECU are the same on all models from those years. I said ok at the time being but now the car is not running as smoothly as it was before. It also have some misfire from time to time and it feels like is choking and rough running. Can anyone explain me if what this guy did was correct or there is compatibility issues. ? Thanks

September 12, 20232 yr

Hello Radu,

Unfortunately, I cannot help you with this, but I would suggest you get a local independent specialist opinion without delay.
Re. the Adblue delete:- does this render it no longer ULEZ compliant ??
Kind regards,

Gareth.

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Car is a pile of junk, gone to go out and showing 24 faults.
Audi Q6 Club

Car is a pile of junk, gone to go out and showing 24 faults.

Audi Q6-Etron · May 25May 25

Hi all, well the Audi Q6 car has gone well and truly mad, claims to have 24 faults, just got in the car to go out and now can not, Audi can not send a tech support person till tomorrow. Here are just some errors the car is showing, here are the top 16 faults Steering Fault. Please stop vehicle Rear Cross-Traffic unavailable Rear Turn Assist unavailable Side Assist unavailable Lane Departure Warning currently unavailable Exit Warning unavailable Emergency Assist currently unavailable Adaptive L
- 25 replies
- 677 views
Audi Q6-Etron

May 25May 25

Audi Q6-Etron

15 minutes ago15 min
A3 uncommanded engine shutdown
Audi Technical

A3 uncommanded engine shutdown

Bobs dad · 23 hours ago23 hr

I have a new A3 Black Edition auto. Within four weeks of delivery the engine cut out whilst driving, the drivetrain under positive power. The car rolled to a complete halt, the retardation entirely commensurate with the wheels driving a dead engine - it did not freewheel. The instrument panel remained powered and displayed no warning lights or fault messages. I shut the car down and after a pause restarted. Since then it has operated normally. The Distributor has found no data supporting t
- 4 replies
- 90 views
Bobs dad

23 hours ago23 hr

Bobs dad

46 minutes ago46 min
Free Allroad 17” Twin Spoke Alloys (A6 C5)
Audi A6 (C5) Forum

Free Allroad 17” Twin Spoke Alloys (A6 C5)

56Doc · February 25Feb 25

I’ve had these wheels since I sold my old 2004 Allroad many years ago & now they’re just in the way, so if anyone wants them, they’re available in Weston-super-Mare! they were refurbished after I bought them, I used them as my summer wheels. I know 1 wheel had a chip in the lacquer, but that was it, they’ve been undercover in the garage ever since I Sold the car, So should be pretty much the same. free to collector if no takers I’ll have to scrap them.
- 30 replies
- 1,570 views
56Doc

February 25Feb 25

56Doc

47 minutes ago47 min
DAB upgrade for 2013 A6 allroad
Audi A6 (C7) Forum

DAB upgrade for 2013 A6 allroad

CHM · May 14May 14

Dear all. I have recently purchased a japanese Import 3.0 A6 Avant allroad. The MMI shows FM, AM and LW but no DAB. Is/was there an upgrade available from Audi or aftermarket when DAB became more commonplace.(Vauxhall offered DAB upgrade for my 2014 Zafira in 2015).
- 1 reply
- 189 views
CHM

May 14May 14

56Doc

1 hour ago1 hr
Alternator failure related to mild hybrid system?
Audi A7 Club

Alternator failure related to mild hybrid system?

PocketsAintEmptyCuh · October 16, 20232 yr

I've been seeing more and more posts across FB and multiple forums about people having the alternator failure related to the 48v mild hybrid system and wanted to see if anyone has had this issue and how their experience has been. I know in USA they have announced a TSB with an extended warranty for 7 years but I am trying to get more info from Audi UK but not getting anywhere. Has anyone had this issue and if so has Audi fixed it (if out of warranty)? It seems to be tha
- 665 replies
- 213,456 views
PocketsAintEmptyCuh

October 16, 20232 yr

PeterWJames

1 hour ago1 hr
Running boards 2024 black petrol standard model
Audi Q5 Club

Running boards 2024 black petrol standard model

Peter aeddon · 14 hours ago14 hr

Hi I’ve just joined and I want running boards on my 2024 Q5 petrol standard. I live in Edinburgh does anyone know where I can go other than the main dealer as they are extremely expensive. I require them to supply and fit for a good price.
- 2 replies
- 58 views
Peter aeddon

14 hours ago14 hr

Peter aeddon

2 hours ago2 hr
New 226 audi q3
Audi Q3 Club

New 226 audi q3

james brown · January 20Jan 20

Any member bought one.
- 54 replies
- 3,287 views
james brown

January 20Jan 20

Audisq524

2 hours ago2 hr
Audi A4 B9 Avant 2016 TDI > Brake pad wear sensor message
Audi A4 (B9) Forum

Audi A4 B9 Avant 2016 TDI > Brake pad wear sensor message

letsonk · 2 hours ago2 hr

Hi can anyone help with this. I'm looking to code out the 'brake pad' wear limit reached message on dash. I managed to eliminate the orange brake light symbol when the message appears along with the audible by changing the long coding on VCDS but does anyone know where i can delete the message aswell on VCDS? New pads & discs fitted and also new genuine brake wear sensors but there seems to be that there might be a fault somewhere so im looking to de code it completley. See picture below
- 0 replies
- 20 views
letsonk

2 hours ago2 hr

letsonk

2 hours ago2 hr
Recall for Pretentioner / Seat belt 2026 model Q5
Audi Q5 Club

recall
Recall for Pretentioner / Seat belt 2026 model Q5

PaulBoxer · 3 hours ago3 hr

Has anyone else had the latest Q5 Recall for seat belt pre-tensioner “recalled” ? More interestingly did anyone have the recall work carried out? My 2026 Q5 was Recalled, however I received notice that the Recall was indeed Recalled which seems strange
- 2 replies
- 38 views
PaulBoxer

3 hours ago3 hr

PaulBoxer

2 hours ago2 hr
Engine / ECU to Injector wiring loom
New Members Introductions

Engine / ECU to Injector wiring loom

Neil Robertson · 12 hours ago12 hr

Hi, I'm looking for a engine/injector wiring loom that goes from the ECU (8P0 907 115 T Med 9.1) to the injectors (06F906036A) for a Audi A3 2008 2.0L TFSI Quattro due to an intermittent misfire issue on cylinder no. 4. Cost from TPS for genuine replacement is astronomical, any help would be appreciated (e.g. where to source a replacement, correct part no., etc)
- 1 reply
- 73 views
Neil Robertson

12 hours ago12 hr

Neil Robertson

12 hours ago12 hr
Are S5's notorious for not being serviced?
New Members Introductions

Are S5's notorious for not being serviced?

ZeroX · May 30May 30

Hi, following on from my previous thread, I have seen another car that I was interested in: https://www.evanshalshaw.com/search/details/used/audi/a5/automatic-petrol-white-coupe/06ce9494-f94d-f111-8fdd-000d3a874790/ When I enquired with the dealer, they said there is only one stamp in the book from February of this year, and no history at all in the Audi database. So there is only evidence of 1 service in almost 10 years. I am starting to get a bit !Removed! off with this actually, and it's real
- 25 replies
- 544 views
ZeroX

May 30May 30

cliffcoggin

12 hours ago12 hr
C5 RS6 034 strut top mount
Audi A6 (C5) Forum

C5 RS6 034 strut top mount

petec5 · yesterday at 09:58 AM1 day

Hello all After a year of owning my first RS6 c5. It seems I'm in need of new strut top mounts. Do any of you have experience of the 034 rubber mounts? I've seen they are solid vs original ones that have bearings. How much of a difference does this make. And on a side note has anyone used RB Racing brake disc. What's your thoughts? Any help will be much appreciated Pete
- 4 replies
- 105 views
petec5

Yesterday at 09:58 AM1 day

petec5

15 hours ago15 hr
Help with some issues
Audi A5 Club

s5 coupe
Help with some issues

Kian · May 27May 27

Hello everyone, Wondering if anyone can help me. A few weeks ago my EPC light came on and immediately went into limp mode and started jumping when driving at 5mph. After a few hours I came back to the car and it was fine so I drove it to my storage unit. I came back the next day and when starting it the EPC light and EML light were illuminated and the idle was quite rough. I came back to it about a week ago and all the doors were locked, the key isn't unlocking it and the barrel of the central
- 5 replies
- 253 views
Kian

May 27May 27

cliffcoggin

17 hours ago17 hr
Wing mirrors don't fold out when unlocking the car.
Audi Q2 Club

Wing mirrors don't fold out when unlocking the car.

john260164 · 19 hours ago19 hr

Hi. My partner's recently bought Q2 has an odd and not very welcome feature. The wing mirrors fold on locking the car with the key pilp, but don't unfold when the car is unlocked with the plip. They only do so when the key goes in the ignition. In some circumstances this can lead to doubt about whether the doors are locked or not whereas before it was obvious as the plip alone folded and unfolded the wing mirrors (as is does with my similarly new A3). The garage says it can't be changed but does
- 2 replies
- 81 views
john260164

19 hours ago19 hr

john260164

18 hours ago18 hr
Park My A3 without having brakes on
Audi A3 (8Y) Forum

Park My A3 without having brakes on

JGB · 23 hours ago23 hr

Hi all I have had my A3 since September 2025 and I haven't yet been able to figure how to park it in my garage with the brakes off. It's an auto and I have read lots of stuff but I cannot figure it out. I may be stupid but there you go any helpful advice will be appreciated. JB
- 2 replies
- 104 views
JGB

23 hours ago23 hr

joe6

18 hours ago18 hr

Welcome to the Audi Owners' Club - An Independent community!

ECU downgrade issues

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Topics

Car is a pile of junk, gone to go out and showing 24 faults.

A3 uncommanded engine shutdown

Free Allroad 17” Twin Spoke Alloys (A6 C5)

DAB upgrade for 2013 A6 allroad

Alternator failure related to mild hybrid system?

Running boards 2024 black petrol standard model

New 226 audi q3

Audi A4 B9 Avant 2016 TDI > Brake pad wear sensor message

Recall for Pretentioner / Seat belt 2026 model Q5

Engine / ECU to Injector wiring loom

Are S5's notorious for not being serviced?

C5 RS6 034 strut top mount

Help with some issues

Wing mirrors don't fold out when unlocking the car.

Park My A3 without having brakes on

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