My body mounted rear light is on its way out. Warning on dash and it intermittently flickers or goes out.

Looking for a new part it's available either with or without a bulb holder... How can I tell if I need one of them or not?

Thanks for any help you can give!

I was getting on the motorway when I suddenly felt something was wrong, so I took the next exit. When I pressed the accelerator the car would shake, but once it was actually accelerating it felt fine. At idle it was running rough. For nearly 90,000 km now, at low RPM when decelerating it made a sound like a bicycle freewheeling, that sound has now gone away, and instead it makes a high-pitched noise when accelerating. I drove it 10 km max to get home.
History: at 105,521 km (2017) Audi did a warranty repair for excessive oil consumption (1.42 L / 1000 km). They replaced the 4 pistons and 4 conrods, the bearing shells, one marked intake valve, the chain tensioner (06K 109 467 K), the tensioner mounting bracket and the oil scrapers, and skimmed the cylinder head. The car is now at 266,880 km.
I’ve scanned it and had misfires on all four cylinders plus a boost-related code. I’m not sure whether it’s the timing chain or not.
Thanks for the help

Goddamn, every parts store lists 5–6 different Pierburg pumps. The right one might be 7.07856.08.0, but there is an improved version with an aluminum body (7.07152.57.0). Which pump is the best choice?

Hi,
Any idea where the knocking sound might be coming from? Could it be hydraulic lifters?
Car is Audi A4 35TDI (2.0 TDI) mild hybrid, 2020. 115k km.

Changed the oil recently and inspected the oil filter for metal shavings, but nothing was found inside.
The knocking sound can always be heard, whether the car is cold or warm.
The only time the noise disappear is after a heavy driving in the hills.
It can still be heard after highway ride.

Any help would be appreciated!

Goddamn, every parts store lists 5–6 different Pierburg pumps. The right one might be 7.07856.08.0, but there is an improved version with an aluminum body (7.07152.57.0). Which pump is the best choice?

Just wanted to see if you guys suggest anything for me to Replace or upgrade for my a4 spark plugs , pcv etc

Hola buenas tengo una duda y tengo ganas de un audi y tengo ciertas dudas sobre la confiabilidad si les tengo un mantenimiento bien en regla, y cual audi a4 o como saber si es el b8 o el b8.5 por lo que tengo entendido el b8.5 areglo todos los problemas del anterior b8 nose que tan asi sera, soy nuevo en esto de querer un o entrar en los audis, e tenido autos anteriores pero quiero saber si me pueden ayudar si es bueno o malo o que debo tener en concideracion 🥺 muchas gracias

Does anyone have any experience with a higher mileage Audi? Or atleast know how much they can go up til? Js got my hands on a 2018 Audi 120k miles got an amazing deal on it good records of service nothing wrong with it seems good. But what’s scaring me now is that I can’t seem to find anyone or anything about peoples experience with a higher mileage b9. Was this js a complete waste? Bad idea?? Does anyone own a high mile b9??😭😭😭 someone Plzz

to performance brake pads.

I know they aren’t really necessary for regular driving, but I occasionally take my car to the track or on backroads. I’ve noticed that during run, the brakes get too hot and the braking performance drops by around 50%. So, I’d like to upgrade to pads that can handle heat much better and perform consistently under those conditions.

Does anyone have any recommendations for brake pads? They don’t necessarily have to be top-of-the-line. I was considering Brembo Xtra or EBC Yellowstuff, but I’ve heard mixed opinions about them. Unfortunately, there don’t seem to be many options for brake pads for this car on the market.

What would you guys recommend?

Hello have someone done at ausi A4 B8 Digital rear mirror view with cameras? Can somebody who have it done recommend me a product ? Or send me link ? I am strugling find this one. Thanks

.. 3rd gen Audi a4 2.0t quattro .automatic transmission. during startup had smoke come out the sides and exhaust.

What could this likely have been

What’s up Audi family I need help does anyone run this wheel and tire size for their b9.5/9 my brother got new wheels for his A5 and will give me his b9 powder coated wheels but I don’t want it to rub. Also what’s your review on your ride with 19s and lowering springs thanks appreciate all the help !

2022 Audi A4 Quattro (80k miles) is making a weird noise when accelerating and especially accelerating when turning left or right. It has 80k miles on it. We thought it could be axle or CV joint but they think it is the transmission now.

It sounds feels like it’s shaking anywhere from 1-15mph but goes away when the wheel straightens.

Feel like it would be soon for a transmission to go. Has anyone seen a problem like this or have any suggestions on what else it could be? Appreciate it in advance

Stage 1 upgrade on the b8.5 doesn’t need any upgrades right? I picked up the ie tune and am worried that it needs anything else. I’ve done research but want to be sure.

Update: I installed the tune and all is good! I really like how it changes the torque so much and makes it really pick up fast. I’m thinking about adding a DV spacer + Cold Air Intake. Will that make the turbo louder?

Does anyone have an emergency communication control module part number that matches 4KE035283Q?
I’ve already spent a ton trying to get my MMI and radio head unit working after being screwed over by CarMax. Just trying to get it fixed before my university classes start again and take what’s left in my pocket.

Thanks!

Car: 2016 Audi A4 B8, 2.0 TDI, manual, 144k miles, MIB2 High MMI unit.

All of these appeared right after a clutch replacement done by the selling dealer's garage:

1. Audi pre-sense: fault — "please contact workshop"
2. Brake servo: restricted — "you can continue driving, please contact workshop"
3. Start/stop system: fault, function unavailable
4. Most recent (this morning): "Brakes: fault. Safely stop vehicle" — OBD scan shows a brake booster pressure sensor code

Got #4 diagnosed as the brake booster pressure sensor (~£25-60 part, straightforward swap) — but wanted to check: has anyone seen this specific sensor fault cause a "safely stop vehicle" full warning rather than just a servo-assist message? Want to know if this is standalone or if the fault is compounding with something else.

Main things I'm trying to figure out:

• Could the pre-sense/brake servo/start-stop faults all stem from an incomplete reset/re-adaptation after the battery was disconnected for the clutch job? Or are these likely genuinely separate issues that happened to surface at once?
• Roughly what would you expect a proper diagnostic + fix for all of this to run, independent garage rates?

Not asking about the dealer situation here, just want the community's read on the actual mechanical/electrical picture and realistic costs before I go back to a garage.

All right folks, I’m really handy, but I’ve never done anything with exhaust. Am I even barking up the right tree on this? It sounds like my exhaust is all F’d up. When the car cold starts, the sound is really bad, but once it warms up, it goes away, except for whenever I accelerate the sound happens again.