Audi S4 Active Exhaust Rattle Fix - B9 3.0L V6 TFSI
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- Опубліковано 25 лип 2024
- Many B9 S4s are experiencing an annoying exhaust rattle related to the active exhaust system. Some S4s, like mine, even throw fault codes including P0477, P0475, and P049F showing there is a problem with the valves. This is often caused by a weak or broken spring inside the exhaust door control unit. Interestingly Dodge Charger and Challenger models have the same Küster brand actuators flaps/valves inside their exhaust too. Facing the same issues a newer spring has been made available by Mopar that eliminates the rattle.
I'm not the first to discover this by any means. There are a variety of posts discussing this issue, this one from DuntLed_Racing is especially insightful:
www.audizine.com/forum/showth...
Per the manual the simplest way to do this process would be to drop the rear exhaust hangers (shown in video) and pop out the other hangers as needed to get clearance. Having the exhaust off completely makes for a nicer video though.
The new part number is: 68319331AA
This site was suggested by DuntLed_Racing where they sell them in pairs:
mfer-1.com/shop/ols/products/...
I purchased mine on ebay here:
www.ebay.com/itm/265443964591
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0:00 Introduction
0:47 Removing Exhaust
1:53 Replacing Springs
3:27 Conclusion
4:39 Houston Space Center
#audi #s4 #b9 - Авто та транспорт
Thanks for the shout-out! Hopefully this fixes the issue and it doesn't return. If only Audi would include the bigger springs from the start...
Your post is really great, definitely confirmed some of my assumptions when I started researching. Fingers crossed, but it makes sense that it would fix it. I also wonder why the old style spring was used. Dodge had a TSB about this in 2016 with the replacement part number. It's slightly disappointing to find problems that were solved two years before your car was made.
Did this last night with the new springs. It actually didn’t resolve my issue. Is there anyway to do this install wrong?
This channel is like gold for me and other B9 S4 owners, thanks Dmitry for all you do! - from a fellow Eastern European B9 S4 owner 😂
Thanks for the kind words :). Glad to hear the videos are helping!
Thanks to your video i've found the solution for the S5 B9 exhaust rattle, mucht appreciated!
Thank you for the video Dmitry
Been waiting for this!
Glad I was able to come through :)
Great video luckily not come across this with mine but always good to know incase it ever happens👍 when will the rear diffuser video be up
My SQ5 is doing this and lucky for me UA-cam has the answer. I’ve seen those springs on the forums
Glad I could help :)
Good video.
I want to change the springs on my 2018 RS5. Do I have enough space to reach the servomotor when I remove the 2 screws on the muffler hanger to lower the exhaust?
I have this rattle and when im driving very low rpm on my audi s5 b9 do you think this will fix the rattle issue?
Thanks for the video. I had those two codes show up for me as well. I bought the springs and replaced both sides and it fixed the code on one side but I still get a code on the other side.
Could it be an issue with the plug/wiring? What do you suggest?
Did you also notice the rattle on acceleration as well? Or just start up? I notice a rattle sometimes and thought that could also we this causing it.
I've def got the rattle on startup and under light acceleration when the valves are closed or partially open. Sounds like a tin can rattling around back there. Funny enough I had a 2017 Charger Daytona and the same thing happened about 5k miles into ownership haha.
My b9 s5 is doing that but I'm debating if I should just go with the awe touring exhaust.
Definitely a solid choice, those awes sound good :)
Audi rs3 8v pfl 2015 came up with them codes p047500 & p049f00
Would I also need to purchase them springs for my exhaust actuators?
I'm not sure what actuators that car uses unfortunately.
I was able to do it with the exhaust still on, you need 8mm ratcheting wrenches that are small. Super easy, the spring aligned by itself and I did it blind at no point could I see the perch.
Definitely do-able with exhaust on the car, glad it worked out for you. One potential risk is you could invert the operation of the valves when installing the spring blind, but you should be good if it's behaving as expected.
Hopefully you can help me. I changed out my motor and now my motors for the valve seem to be opposite settings. One side is open while the other side is closed. Is there a way to reset the positions of the actuators? I have an awe switchpath exhaust and this is the only video I’ve found dealing with the actuators.
I have the same issue on my Roush mustang smh
@@jaimereyes7480 I bought an oem motor thinking it was the same but it is was not. The open and close on opposite sides. I suggest taking off the motor on yours, getting the part number and searching for it. Maybe it came with the oem Audi part but after talking with AWE, I need to buy a different. I just unplugged it and now it’s always open.
I've thought about permanently disconnecting my valves so they stay open all the time. What are your thoughts about doing this?
I did this and I’m happy with it
You could do this, but I would recommend using the plug-in simulators to prevent the codes from being thrown. There is some evidence that it affects performance if the car things the valves aren't functional. For example it may think they're stuck closed.
@@DmitrysGarage hey I unplugged mine and have a cel. I’m also catless aswell so I’m not sure if it’s from that or the valve plugs being unplugged. The tune I have is supposed to shut the cel off for the Downpipe so that’s what’s making me think it may be the plugs
@@giovannimalek9211 i think you’re going to have to scan codes to be sure. Depending on your tune and the model of the down pipe you may or may not get a CEL. For the valves I think you do want those eliminators but I dont think it throws a hard code.
@@DmitrysGarage yea I have scanned them and code come up for all of the above. But they come up as red for the exhaust valves so that’s what makes me think that
I just bought a B9 SQ5 and I get the rattling sound on some cold starts. I also get rattling and weird vibrating feeling when going over bumps or pot holes. The previous owner did install an AWE exhaust. Does anyone think that my exhaust could be the culprit, given the fact that I also feel the shakiness/vibration and hear the rattling/clunky sounds on the passenger side; or does it sound more like a suspension problem?
Magically, the dealership cannot replicate the issue when I bring the car to them.
Honestly its really hard to know without seeing/hearing it. The valve issue doesn’t seem to be bump dependent. U could always take it to an exhaust shop and ask them to look. Its only going to take them a few minutes to rattle the exhaust around.
@@DmitrysGarage Right, I figured I might do that. Thanks.
I get the same code for valve A and valve B but I do not have them on my car. I noticed car throws those codes after hard acceleration.
Do you have the delete modules (simulators) plugged in?
@@DmitrysGarage AWE gave me plugs to put on after I installed the exhaust, but I just can't figure out why those codes pop up after accelerating.
@@allenz4772 So the plugs are connected? If the plugs are in and it's happening maybe they're not functioning as expected, I'd see if AWE can confirm.
When you accelerate, even in Comfort and normal D trans mode, the ECU will open the valves over a certain RPM for exhaust flow. I imagine this is when it does this check, hence acceleration tripping it. There is some evidence that the car will have reduced performance during acceleration if it thinks the valves are broken. Supposedly this is in case the valves are broken and blocking exhaust flow.
@@DmitrysGarage sorry they are plastic caps you put over plugs that were disconnected from exhaust valve. You might be right, ecu might throw a code as it tries to open them. I'll have to contact awe and see what they say. Do you think it will affect the performance? Also I'm getting a boost pressure code that no one knows why, this starts to make sense now. Because of your video I'm on to something, thanks.
Allen, were they just caps? Not simulators? Simulators look sorta like the female portion of the plug on the factory exhaust. They trick thr ecu into thinking you still have valves. I figured they included them. You might just need simulators. I was under impression awe included simulators not caps.
I thought the b9 only has one exhaust valve on the right side? I see you have got two springs? The rattle on my s5 is coming from the right side
There are two valves. One on each side. Afaik the S5 is the same snd has two.
So it's been 10 months since I've 8nstalled the mopar springs but the rattle is back 😢
Has the noise came back
It did not up until a few months ago when I put a new exhaust on, however it re-uses the stock components to actuate the valves and they're still going strong in the new exhaust.
I did this and my fukin valves STILL rattle, waste of 60$ so instead I took advantage of ECS's sale a ordered their exhaust it was 1800$ LOL
That really sucks. Seems to work for a lot of people, but w whole new exhaust is a way better experience anyway.
@@DmitrysGarage yeah… the rods in the piping are just loose as fuk really a shit design, I wish I had waited before I started chopping my exhaust 💀 i coulda gotten a whole new cat back from audi since it’s all welded together. RIP
I just can't put a Mopar part on my Audi, sorry bro. lol
I mean its just a mopar part number. Not a mopar part. They use the same supplier and unlike audi got a revised spring. You might be shocked to learn our audis even have the same transmission as a challenger. Its a global economy. Audi and Chrysler use everyone else’s components just like every other mfg.
@@DmitrysGarage Yup, ZF 8HP is a great transmission!