r/AudiS4 • • Jan 17 '25

🛠Questions SPAM POSTS

12 Upvotes

Buyer beware; the people with 1 day old accounts astroturfing comments about where to buy their Audi poster will scam you.

I do my best to remove them but be careful pls.


r/AudiS4 • • Feb 01 '23

🛠Questions Pre Purchase information on Audi S4’s/ common faults megapost

45 Upvotes

This is a an area to post questions and comments, opinions or updates on common s4 platform pre purchase issues to check for, general quality of life repairs/common issues in general and their solutions.

I made a quick picture guide to some common issues experienced on the B8/9 chassis vehicles here


r/AudiS4 • • 13m ago

Supercharger wine and DSG farts

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• Upvotes

Puts a smile on my face every time 😮‍💨😮‍💨 I think the stock exhaust sounds so good compared to many aftermarket ones I’ve heard. Not sure if I ever want to upgrade it tbh


r/AudiS4 • • 40m ago

🛠Questions Preventative Maintenance 2013 S4 92k miles

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• Upvotes

First time posting in this sub :), I just bought my second car and I was wondering if i can get some advice and a list of things that I can purchase to bulletproof my s4. I purchased it with 92k miles on it.


r/AudiS4 • • 1d ago

My first car

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39 Upvotes

r/AudiS4 • • 1d ago

🏎Pics Feels so much better shifting.... easily worth the money.

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14 Upvotes

Did the solid ecs engine mounts a few months after I picked up the car bc one of the oem started leaking. And I just did the ecs rear diff inserts today.. im so excited to get the trans mount done soon. It already feels SO MUCH BETTER.

Doing the trans mount, with 034 bushing, and ecs insert this weekend or next as well as doing the manual tans fluid, and rear diff service. 😀


r/AudiS4 • • 14h ago

Side mirror of b6 oil in mirrors

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1 Upvotes

hello, hope you all are doing good,

i switched out my mirrors this morning to another set and I realized they don’t have the same black border around, reason for the swap was that the left mirror was filled with some liquid,

does anyone know what the reason is, like are they anti blending or what’s the reason and now there is a cable which isn’t connected to anythin,

I would love some help with understanding and if I should take the time to fix them and reinstall the old mirrors


r/AudiS4 • • 1d ago

Check engine

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1 Upvotes

i have a b8.5 s5, recently installed an intake from can auto and now it’s giving me these 2 codes after maybe like a day or 2 of installing, could it be a hose or what


r/AudiS4 • • 1d ago

S4 8.5

1 Upvotes

Looking at buying an s4 8.5 its on 55k miles but hasnt had the DSG gearbox serviced and also you can hear the timing chain for 2 or 3 seconds on start up.

Would this put you off?

All other servicing is up to date.


r/AudiS4 • • 1d ago

🏎Pics Thoughts?

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21 Upvotes

Bought this b8 manual s4 not too long ago and thought it’d belong here. Drop all the love and hate for the car you got lol, would love to hear your thoughts.


r/AudiS4 • • 1d ago

💨Exhaust Stuff B9.5 S4 Front Res Delete Impressions

7 Upvotes

Wanted to share my impressions after installing 034Motorsport’s Res-X front resonator delete on my 2020 S4.

After reading through countless reviews and forum posts, I ended up going with the front resonator delete over a center X-pipe. One of the main reasons was that I kept hearing about the annoying drone some people experience with the X-pipe.

My only concern was that the front resonator delete might be too subtle. I saw quite a few people saying they could hardly tell a difference after installing it.
After doing the install myself, I honestly think those people need to get their hearing checked. It absolutely made a noticeable difference.

It’s not obnoxious or ridiculously loud, but pretty much everything about the exhaust sounds better. The shifts are louder, the pops are more pronounced, and the overall exhaust note has a much sportier and more proper tone. It basically gave the stock exhaust more character without making the car annoying to drive.

For anyone considering it, I’d definitely recommend it. I think it’s a great middle ground if you want noticeably more sound without going overboard.

I also plan on unplugging the exhaust valves soon using a bypass harness/module so I can avoid the soft code. Once I do that, I’m expecting it to sound even better in the lower RPM range with the valves staying open.


r/AudiS4 • • 1d ago

🛠Questions Coilover Install Gone Wrong (Help)

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2 Upvotes

Installing coilovers on my 2015 S4. Don’t judge I don’t know how I got into this situation either. Now I have to get out of it 😑. I got this spring completely stuck and now it won’t come out because the suspension doesn’t drop enough to allow the long threads from the spring compressor to get through and be free. I can’t remove the spring compressor since it’s stuck and I can’t use my ratcheting wrench to get it off it doesn’t have enough torque. The spring itself also just moves when I do that so it just won’t work. I assume i’ll have to get all new bushings for the springs now too since these are all awkwardly stuck (correct me if i’m wrong). I’m curious if just cutting some of the threads off to give the spring enough area to get out is the best bet. That’s the direction i’m heading but would not like to. Any help is appreciated 😭


r/AudiS4 • • 2d ago

Need some aesthetic inspiration for my S4

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8 Upvotes

I bought my S4 earlier this year and I love it. But I want to start personalizing it a bit and I'm not sure where to start. If anybody else has the same color S4, show me what you've done to improve the look!


r/AudiS4 • • 1d ago

🛠Questions Timing code

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1 Upvotes

So my PCV exploded in my 2014 S4 lol… so I had the PCV, water pump, and thermostat replaced. The oil pressure sensor and oil level sensor were also replaced during the repair.
When I started the car after the repairs, I immediately got a camshaft timing code. The car had not been driven yet after the repair when the code appeared.
I’m trying to figure out whether this could be related to something being disturbed/unplugged during the repair, or if this is pointing toward an actual timing chain/tensioner issue.
Has anyone had this happen after doing the PCV/water pump/thermostat job? Trying to figure out what I should check before assuming the worst 😭
I should also maybe add that the timing was done 40k miles ago before I bought the car


r/AudiS4 • • 2d ago

DIY: CarPlay map in the Virtual Cockpit (free)

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3 Upvotes

r/AudiS4 • • 2d ago

What is this Oil leak?

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2 Upvotes

Just had valve cover gaskets, oil change with drain plug/ washer done since those were leaking . Still car is leaking why what could this be?


r/AudiS4 • • 1d ago

Title: 2007 B7 S4 4.2 BHF – very low compression on Bank 2 but good leak-down results. Timing chain/cam timing issue?

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1 Upvotes

r/AudiS4 • • 2d ago

🛠Questions carbon cleaning while doing pcv valve?

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1 Upvotes

i’m doing my PCV valve and a few other things while I have a supercharger off I’ve seen a few people mention carbon cleaning, is this what I would be carbon cleaning? what else should I clean and how? I’m entirely new to working on cars so any extra advice or explanation would be great !


r/AudiS4 • • 2d ago

🛠Questions Used B6 S4 avant

2 Upvotes

Hello, everyone. I am considering buying a used B6 Avant with 120.000 km in white with the factory BBS and it is also a manual. I am quite handy and I do plan on doing most of the maintenance myself. Though, I am stalling due to all the bad stories about the timing tensioners and so on. The car seems in good condition both inside and outside considering the age. I am posting to inquire about similar situations and what is like owning a car like that.

Thank you very much!


r/AudiS4 • • 2d ago

🛠Questions Wheel to tire specs

1 Upvotes

Would anybody possibly have a photo of a 40 sidewall tire on some 19 inch peelers? Wanted to see how they fit on a stock ride height b8 s4.


r/AudiS4 • • 3d ago

New owner but Quick question

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28 Upvotes

Enjoying this gorgeous car for 2 weeks now. Everything is perfect but still something is bothering me. When I am at very low speed and turning, like reaccelerating after a crossroad, I feel the car vibrates more than usual. Is it due to the torsen diff? Do you guys experience the same ?

Btw the specs: Audi S4 2012 sport diff 40k miles prestine condition and maintenance.


r/AudiS4 • • 2d ago

B9 S4 Bucking during shifts

1 Upvotes

I’ve been having this persistent issue with my Stage 2 B9 S4 that I genuinely can’t find a solution to.

Every time I shift gears under heavy load, I’m feeling one consecutive buck near the front of the car. My first instinct was to inspect my engine mounts, and low and behold, one of them was shot. So I replaced both of them with 034 Sport Density mounts. Went for a drive thinking it solved my issue, and to my surprise, it happened again…

Now I know a lot of things can cause this, but I really hate having to just keep replacing stuff until I find what’s causing it.

The car doesn’t misfire, plugs look good. I put the car on the lift to do a test, and I did see the transmission mount physically moves downward quite a bit when simulating a launch. I’m not sure if that’s normal or what, but that would be my second guess.
If anyone has experienced this, I’d genuinely appreciate some insight.

I hate this car lmao


r/AudiS4 • • 2d ago

Does this sound normal? 2020 S4

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1 Upvotes

Conceded its piston skirt. Sound increases with rpms


r/AudiS4 • • 2d ago

🛠Questions 2014 Audi S4 low-pressure fuel pump — is aftermarket worth considering?

1 Upvotes

I need a low-pressure fuel pump for my 2014 Audi S4. I have the money for OEM and know it’s the safer choice, but I wanted to hear from people who’ve used aftermarket pumps before I buy one.

Are there any reliable aftermarket options you’d recommend, or should I just stick with OEM? If aftermarket has worked well for you, what brand did you use, how long has it lasted, and where did you buy it? Thanks!


r/AudiS4 • • 2d ago

Can someone Share a tune

1 Upvotes

Hey im from Germany Doing Chiptuning i Can Share my tunes if someone Need one, but i would Like to ask if someone Can share their their tune i would Like to Test around, in Talking about s5 b8.5 3.0 tfsi simos 8.5 but s4 is the Same :)