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Old 08-16-2015, 01:20 PM   #1
KeshyWRX
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Default 2015 WRX-Vibration/Rattling in Gear

Hey All,

I have a 2015 WRX Limited with the following mods:
  • ETS Intake w/box
  • Cobb Turboback Exhaust
  • Protune

Car has just under 4,500 miles on it, 8 months old and had one oil change at 1,900 miles.

Car has been running great until this morning.

As I drive my car in any gear I hear this rattling/vibration in the cabin. It is very loud when I am in low rpm's and just cruising. When I coast in neutral I don't really hear the vibration. It almost sounds like a metallic vibration.

The car is running fine from what I can tell at least. I am no mechanic by any means. Drove the car last night and it was fine.

It has been between 80-90 degrees here the past couple weeks as well. Yesterday we had a little rain but nothing unusual. Never had this problem in the rain before.

I am planning on calling my dealer tomorrow and setting up an appointment to have it checked out.

Just wanted to see if any experts on here can provide any insight to give me a little peace of mind until then?

Thanks,
-V
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Old 08-16-2015, 01:49 PM   #2
RedLineAddict
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I've heard of the j-pipe hitting against on of the bolts on underside , believe it's a control arm bolt.
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Old 08-16-2015, 01:55 PM   #3
KeshyWRX
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Quote:
Originally Posted by RedLineAddict View Post
I've heard of the j-pipe hitting against on of the bolts on underside , believe it's a control arm bolt.
The only thing about that is, the j-pipe has been on the car for ~1,500 miles (1-2 months), and I haven't heard anything until today.

I'll see if I can check under the car real quick. Thanks for the input!

-V
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Old 08-16-2015, 04:15 PM   #4
Boggie1688
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Before going into the dealer, I'd go under the car and check everything you installed.
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Old 08-16-2015, 04:23 PM   #5
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Quote:
Originally Posted by Boggie1688 View Post
Before going into the dealer, I'd go under the car and check everything you installed.

Okay I'll see if I can. To be honest I had my pro/tuning shop install both the exhaust and intake.

I also ran a few datalogs today. Engine feels super healthy with absolutely no knock or DAM drops. So I'm hoping to rule out any engine problems.

My fear is that it's a transmission problem. I'm getting a bit paranoid here I know.

I briefly looked at the intake, and it looked okay.

Car is sitting in the driveway until I can take it to dealer or someone to help me check it out. Whether it's nothing or something really bad, I don't want to risk making things worse by driving.

Thanks for all the input!

-V
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Old 08-16-2015, 06:48 PM   #6
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Default 2015 WRX-Vibration/Rattling in Gear

Okay so I found this video. It's of a 2015 BRZ with "engine chatter". Not sure what that really is, but my car makes the same exact sound.

From 1:30 on you can really hear the sound.

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Old 08-16-2015, 07:17 PM   #7
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Also sounds like this just not as loud:

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Old 08-17-2015, 12:28 PM   #8
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Bump for any new input?
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Old 08-17-2015, 12:48 PM   #9
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That center diff video for the 2008 WRX isn't normal unless that car had lots of hardened engine and transmission mounts. If your car sounds like that, you've got a problem.

Once you take the car into the dealer be prepared for them to tell you any powertrain warranty work will be denied due to engine modifications. If it were me, I'd probably take the car back to the shop that installed your parts and have them check for any rubbing of exhaust and intake pipe parts. You could probably save yourself some money and do it yourself with $100 in jack stands and hydraulic jack.
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Old 08-17-2015, 01:03 PM   #10
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Quote:
Originally Posted by MaddMax View Post
That center diff video for the 2008 WRX isn't normal unless that car had lots of hardened engine and transmission mounts. If your car sounds like that, you've got a problem.

Once you take the car into the dealer be prepared for them to tell you any powertrain warranty work will be denied due to engine modifications. If it were me, I'd probably take the car back to the shop that installed your parts and have them check for any rubbing of exhaust and intake pipe parts. You could probably save yourself some money and do it yourself with $100 in jack stands and hydraulic jack.
Okay, yea the sound isn't anywhere near that loud/bad. But it's definitely noticeable. It honestly sounds like a very loose heat shield, but I don't think the symptoms I have are the same as a loose heat shield. I scheduled an appointment with the tuner shop to take a look next week the day before my appointment with the dealer. So if the shop can cure it I can just cancel with the dealer.
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Old 08-17-2015, 01:44 PM   #11
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Quote:
Originally Posted by KeshyWRX View Post
Okay, yea the sound isn't anywhere near that loud/bad. But it's definitely noticeable. It honestly sounds like a very loose heat shield, but I don't think the symptoms I have are the same as a loose heat shield. I scheduled an appointment with the tuner shop to take a look next week the day before my appointment with the dealer. So if the shop can cure it I can just cancel with the dealer.
Not sure if you realize this, but the fact that you put the jpipe on the car, essentially closes the door on taking the car to the dealer with any kind of power train related issue. Unless you are going though the trouble of putting the car back to stock, including new nuts and bolts and making sure all the paint marks line up........
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Old 08-17-2015, 01:48 PM   #12
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Quote:
Originally Posted by slicky View Post
Not sure if you realize this, but the fact that you put the jpipe on the car, essentially closes the door on taking the car to the dealer with any kind of power train related issue. Unless you are going though the trouble of putting the car back to stock, including new nuts and bolts and making sure all the paint marks line up........
I understand that. I have a good relationship with my dealer. I am not trying to jerk anyone around. If they can diagnose it and give me a quote, if they deny warranty, then that's fine. As long as it will fix whatever the problem is. I paid to play. It has been fun, and I want to keep it that way. I want to make sure the car is okay and working properly.

Thanks,
-V
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Old 08-17-2015, 02:38 PM   #13
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If the cat has a piece loose sometimes it can sound like metallic rattling.
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Old 08-17-2015, 02:46 PM   #14
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Quote:
Originally Posted by swrdply400mrelay View Post
If the cat has a piece loose sometimes it can sound like metallic rattling.
I'm hoping that is the issue. I am going away on vacation in a couple days and wont be able to look into the issue until next week when I have the appointment with the pro shop.

In the meantime the car will stay parked/garaged. I will keep this thread posted when I find out the verdict. In the meantime I appreciate any and all input received!

Out of curiosity, is it possible for something to get loose from hard shifting? I shifted a bit hard a couple times since I owned the car. Never dropped the clutch or anything like that. When shifting this way I heard a thunk, which I thought was due to my hard shifting of the car. I haven't shifted like that for awhile and don't plan on doing so again.

Thanks for the input!

-V
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Old 08-18-2015, 10:50 AM   #15
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So I had to use my car and drive about 5 miles yesterday. It was 90 degrees and I put the AC on. I noticed that when I used my AC the rattling was more prominent and noticeable. Would a part of the AC cause more vibration and rattling?
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Old 08-18-2015, 10:54 AM   #16
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Yes, the AC compressor will cause more vibration, hence more rattle.
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Old 08-18-2015, 10:57 AM   #17
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Quote:
Originally Posted by shadrag View Post
Yes, the AC compressor will cause more vibration, hence more rattle.
Thank you sir! If the AC causes more rattle, it's safe to assume something is just loose rather than a severe transmission or diff problem?

Thanks,
-V
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Old 08-18-2015, 10:59 AM   #18
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Definitely sounds like it
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Old 08-18-2015, 11:32 AM   #19
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Quote:
Originally Posted by shadrag View Post
Definitely sounds like it
Thank you sir!! Appreciate the input!

I am planning on taking the car to the tuner next week and inspect the entire car to make sure nothing is loose. Car will be sitting in the garage until then.

I will keep posted, and cross my fingers that it's nothing severe.

Thanks,
-V
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Old 09-02-2015, 01:58 PM   #20
KeshyWRX
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Hey All,

Just wanted to give you an update on the rattle/vibration in my car.

Took it to my pro-shop to have it checked out. After driving it for 15 seconds they heard the noise. They were able to narrow it down and conclude that the intake box was rattling against the chassis of the car and making a loud vibrating sound. They installed some spacers between the box and chassis and made sure they were securely fastened.

I haven't heard the rattling sound since!

If anyone has an aftermarket intake/box, make sure you check that area to ensure there is no play if you hear any sounds.

Thanks,
-V
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Old 09-02-2015, 04:03 PM   #21
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Ahh the joys of shoddy aftermarket part design. I'd take that airbox out and put the stocker back in. There's no power gained with it.
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Old 09-03-2015, 04:11 PM   #22
KeshyWRX
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Quote:
Originally Posted by MaddMax View Post
Ahh the joys of shoddy aftermarket part design. I'd take that airbox out and put the stocker back in. There's no power gained with it.
I wouldn't say there's absolutely "no" power gained with the intake. Especially paired with the turbo-back exhaust and pro-tune. Makes a few hp at the least. Plus I highly enjoy hearing the spool up of the turbo. The design of the intake isn't bad. Just needed some spacers.

-V
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Old 09-03-2015, 05:32 PM   #23
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Quote:
Originally Posted by MaddMax View Post
Ahh the joys of shoddy aftermarket part design. I'd take that airbox out and put the stocker back in. There's no power gained with it.
hmmm...A few hp here...A few hp there...Next thing ya know someone is looking at YOU in their rear view mirror. LOL
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Old 02-14-2017, 02:29 PM   #24
Nik4wrx
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Default Same thing

Quote:
Originally Posted by KeshyWRX View Post
Hey All,

Just wanted to give you an update on the rattle/vibration in my car.

Took it to my pro-shop to have it checked out. After driving it for 15 seconds they heard the noise. They were able to narrow it down and conclude that the intake box was rattling against the chassis of the car and making a loud vibrating sound. They installed some spacers between the box and chassis and made sure they were securely fastened.

I haven't heard the rattling sound since!

If anyone has an aftermarket intake/box, make sure you check that area to ensure there is no play if you hear any sounds.

Thanks,
-V
Hey man , I'm currently having the same exact problem and I could relate to how paranoid you were about it because I'm over here at work looking at forums lol. So mine is doing the same thing with vibrating at low rpm's and everything . Only difference is that mine is a Cobb big SF Intake with air box. So I will try what you said but it sounds like a good solution as the sound I'm pretty sure is coming from the Intake
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Old 07-25-2017, 07:25 PM   #25
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Hate to bump an old thread but wow I'm so glad I found this thread. I have the same exact noise and also have the Cobb SF intake and box. Going to be looking it over and make sure everything is tight.

I almost shat my pants when I heard this noise when I was coasting to a stop. Thought it was knock and checked the AP and didn't show any signs of knock feedback. Big sigh of relief and *knock on wood*
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