Does anyone know if I’m manual swapping my 2001 a4 what all wire/ modules do I have to swap over for it to work?

i’m just looking to play music since my stock radio had water damage and i’m having issues finding which one looks best

My temp gauge on my 1.9tdi never moves. The only time the temp starts moving is in very warm weather and driving pretty hard.

I've replaced the thermostat today and my temp still isn't going up, I'm not too sure if it could be the coolant temp sensor.

Any help is appreciated

As I’m sure you’re Aware, AEB and older gas models use the MAF to know what to inject, and having a full BOV does ruin low ends after the valve opens, due to incorrect injection.

Has anyone put an hybrid BOV? Would like to have the sound but wouldn’t want to lose performance :(

Does an hybrid Valve have a good compromise between power loss and sound it makes?

I'm searching everywhere to find A4 B5 1996 1.6 Owners Manuel I found one and It was with money where I can find for free ?

A few months ago I ended up trading a few cars around and have found myself owning another A4. I had a 99 1.8 manual a long time ago and I really liked that car but my life wasn't put together enough to keep it together so I sold that car. All this time later I now have an 01 2.8 auto quattro and im loving it.

I've been tinkering with it some and doing regular maintenance and cosmetic repairs, but im curious to know what all exists!

What are some things you've either retrofitted, swapped, made, upgraded, etc etc that you genuinely enjoy? How are some of the ways you've addressed your peeves about this platform? Are there any fun factory options that just bring it all together for you?

So far I've taken all of my grey seats out and dyed them with Angelus (I think was the name??) To black. I find that my front seats do leave some comfort to be desired. I think the lumbar support is too high up my back and makes my kidney area sore after a long drive, and the foam itself isn't all that soft. My kids rarely ride in the back so im really only interested in front seats.

The headliner was completely gone and orange dust was getting in my coffee, so I pulled it all apart and covered it and the 'a' and 'c' pillars in a suede-like material as well as using a plastic dye to color the grab handles, sun visors, and various other trim pieces black as well. I haven't decided what to do with my broken 'b' pillar trim yet though.

I sound deadened the trunk area and under the rear seat. I also took the opportunity to put a few pieces on the ceiling while it was apart.

Im currently slowly finding time to take my door panels off and replace the speakers as well as sound deadening inside the doors. (But I also do wonder if I should leave the foam sheet or if I would have better speaker output with it being removed)

I've lowered the car 1-1.5" while I was replacing the struts and I've put a set of 19" wheels from a newer audi on it as well.

I've included a few photos from along the way that capture some of the headaches I've had as well. Sadly I dont have any interior pictures yet as im still embarrassed by the mess it currently is in lol

I’ve been having some signs of bad valve seals on my car, so to make the job a little more bearable I designed and printed these tools.

Demo video and link to the files in the comments!

Hello I have a 1996 A4. Unfortunately its vents have stopped working. This has happened before and my mechanic swapped the electric breaker to fix it.

Is this something I should be trying out myself? I will do it with the ignition off and while standing on top of a piece of wood.

Where can I find the breaker diagram? I know where the cabin breaker box is just not which breakers are for the vents.

I lost the other half of this key while swapping my engine and now im looking to buy a new key from ebay and possibly transfer this circuit board to the new key, but while looking for keys i saw that there are 2 options. One with the 2032 battery and one with the 1616 battery. Is it possible to tell which one of those my key used to have?

Help please

https://www.reddit.com/r/MechanicAdvice/s/ZpprKsmy33

Please help if you can need some suggestions please

I have a 2002 s4 that im having trouble passing emissions because I have a p0442 code. I’m asking to see where else I should check for leaks or how I can temporarily remove the code. I’ve replaced the n80 valve twice with known good ones and verified they work. I replaced the hard line that runs over the top of the exhaust because it was a little burnt. Every check valve and hose has a clamp and seems fine. The leak detection pump also visibly looked ok. Any other places I should check? I also don’t have access to a smoke tester.

My AC stopped blowing cold air again, I had to tighten up the tensioner a week ago and it was working after that, thinking I was low on refrigerant I attempted to put some in and the gauge showed really high pressure. Are the pressure switches common fail points or is this a compressor issue? TIA for any helpful info as always.

In march i bought this car, a 12/1998 A4 B5 sedan 1.8 20v ADR as a project car. i knew it needed some work but it didn't bother me since i got it for 900 euros with a fresh ish respray in 2017 and 2 sets of wheels and some new parts on it.

On the drive home it kept flashing the oil pressure light every 15 min (no engine noise). i pulled into a gas station, cleaned the oil filter and changed the oil (the oil in it was shit, water basically) with whatever the gas station had (generic brand) 5w30 (i think it's a little too thin for this car). it got me home and it only flashed it one or 2 times during that drip but it would cycle min/OK on tester mostly at idle (car also had an idle issue).

since then i replaced:

-coolant temp sensor

-oil, air, cabin, fuel filter with MANN

-fuel hose from pump to filter (was leaking)

-thermostat, timing belt, tensioner, acc belts

-NGK spark plugs

-throttle body with used one

-vacuum hoses (PCV breather hose, hose leading from it, some small hoses around the intake and the vacuum connecting to the throttle body)

-oil pressure/temp sensor

after i did all of this it hasn't flashed the oil pressure light in 400km but i've also seen it do min/OK on tester mostly at idle. last week it flashes the oil pressure light in a tight corner uphill at 70kmh at 4k rpm and then after the corner it stopped and hasn't flashed it since. i've driven it 130km since.

previous owner also replaced oil pump and lifters 30k km ago...

car still has the 5w30 generic oil in it as i only did 1000km on it. i would like to change it by the end of summer. my clutch fan is also acting up a little (spins a little slowly). could the oil be getting to hot and combined with it being too thin causing this? i plan to put 10w40 in it.

what are your thoughts?

also the car drives absolutely perfectly (also has new tires on 16" wheels, new upper front arms, new rear brake calipers). no weird noises from engine, i did some longer 120km trips in it etc. pulls well, revs nicely...

Hi all,

Apologies in advance for the long post, but I’m running out of ideas at this point.

The car has overheated 3 times, and every time it’s been after around 20-30 minutes of crawling or stop-start traffic on a warm day (24c +) after around 40 minutes- 1 hour of normal driving

Incident 1: Heavy town traffic with the A/C on.
Incident 2: After motorway driving, then prolonged slow traffic on a 40 mph A-road with the A/C on.
Incident 3: Motorway congestion with the A/C off.

Outside of those three occasions the car has been absolutely fine. I’ve done multiple long motorway journeys, plenty of normal driving, and it’s also been in heavy traffic on other occasions (even with the A/C on) without overheating. It isn’t something that happens every time.

A few months before the first overheating incident, the following work was carried out:
New radiator
New cooling fan
New expansion tank and cap
New water pump
Timing belt and tensioner
New auxiliary belt

After the first overheating incident my mechanic found some corrosion around the thermostat housing, cleaned it up and then left the car idling for around 3 hours. It never overheated during that test, since then it’s overheated twice over a 3 month period.

The thermostat itself has never been replaced.
One thing I noticed after the latest incident: when I switched the engine off, the cooling fan stopped immediately. I then turned the ignition back on (without starting the engine), the fan kicked in and kept running until it eventually switched itself off.

The expansion tank has warped again and needs replacing, and there’s also a gasket leak that still needs identifying and fixing. I’m also wondering if one of the overheating events may have damaged the radiator, although I haven’t found any obvious coolant leaks.

Before I start replacing more parts, what would you be looking at?

Wondering where it would be a good place to list for sale ? Pic is for reference only

Anybody who understands this or done it them selfs please let me know

I have a b5 s4 that is in dire need of new headlights, the housings are in really rough shape. I can't seem to find any for sale, used or new. Can anyone recommend sites where I might be able to source them? (located in Finland)

Hi y'all, does anyone know how to remove the intake manifold on a Audi A4 B5 1.9 tdi AFN ? I CANNOT for the life of me find anything online, sorry i didn't take any pictures, if needed i could take some, 2 or 3 screws are inaccessible with the wastegate in the way, i can't imagine it needs a special tool, not even the service manual shows how to take it off, they're just like "take the nuts off" yeah duh 😭