[psmitty95]

Hey guys so my car is making two noises that don't seem normal and I wanted to see if anyone had any ideas on what they might be. First one i've posted about before and it's basically a squeaking noise. When coming to a stop during parking or turning off the car it makes a squeaking noise. Below i'll post up a video where you can hear it clearly. In the first scene of revving listen closely to when the car shuts off.

Second noise which just started a little while ago is bizzare... During medium load (4th gear at 35 ish) as the turbos are spooling the car makes a noise that I can't really describe. Sort of sounds like an alien... I tried to capture it on video and you can hear it if you listen closely with the speakers turned up (Sound occurs at :03). That video will be the second one. This sound is also the one i'm most concerned about...

Now the weirdest part about both of these is the car pulls as hard as always. No hiccups or anything of that sort. Also did a log yesterday and everything seemed in check. I feel like second noise might be something turbo related and maybe its a weird variation of wastegate rattle? Anyways any help is greatly appreciated and thanks in advance.

Squeaking noise:

Weird alien sounding noise (sound happens right at :03):

Edit: First video sound occurs in the first scene. Literally right as the car is shutting off. Car has 55k miles on it. In my other thread we thought first sound might have been a belt so that has been replaced and but the sound is still there. Here's another video of the first sound

[JC888]

First sounds normal... heard this on pretty much all n54s. I believe its the fuel pump.

Second... no idea

[Lankster]

I couldnt hear the noise described in the first video, but the second one I heard it. It sounds VERY similar (almost identical) to when I had my Audi A4... totally different engine and everything I know, but happened under the same driving conditions you described. I could never figure it out either. My thought was turbos, but mechanic said its fine. Hope you figure it out!

[psmitty95]

Originally Posted by jcy335xi

First sounds normal... heard this on pretty much all n54s. I believe its the fuel pump.

Second... no idea

Really? When I first got the car it wasn't happening and I haven't ever heard it on any others... It also happens when coming to a stop and putting in the clutch around 1200k

Originally Posted by Lankster

I couldnt hear the noise described in the first video, but the second one I heard it. It sounds VERY similar (almost identical) to when I had my Audi A4... totally different engine and everything I know, but happened under the same driving conditions you described. I could never figure it out either. My thought was turbos, but mechanic said its fine. Hope you figure it out!

First video if you listen at the end of the first scene you hear it. It's a loud squeak right as the car is shutting off. Yea I think it might be turbo's... time for Vargas stage 3's? Haha I wish but I couldn't afford those right now

[JC888]

Ah I was listening and hearing the squeak after each rev.

[psmitty95]

Anyone think it could be something like downpipes rubbing and not wastegate rattle? Here's another video of another noise I heard today in a parking garage... It happened every time I let off the gas when revving. Maybe this noise is what the "alien" sounding noise is under boost? Sounds to me like downpipes rubbing but idk