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      06-22-2012, 05:48 PM   #1
BM321
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E90 320i excessive road noise

Hi Guru's
I have recently noticed an increase of road noise/resonance coming from the front end (I think) of my E90 320i (110K km). The intensity varies depending on road surface and increases under brakes. I have non standard (non-RFT) 19" wheels and tyres (Kumho 235/35ZR19). The BMW dealer service department said the differential needed replacing at a cost of $2920 (parts only) which I am very sceptical about. I'm thinking maybe the front wheel bearings maybe on the way out. What do you guys think?

Cheers
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      06-22-2012, 08:39 PM   #2
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Quote:
Originally Posted by BM321
Hi Guru's
I have recently noticed an increase of road noise/resonance coming from the front end (I think) of my E90 320i (110K km). The intensity varies depending on road surface and increases under brakes. I have non standard (non-RFT) 19" wheels and tyres (Kumho 235/35ZR19). The BMW dealer service department said the differential needed replacing at a cost of $2920 (parts only) which I am very sceptical about. I'm thinking maybe the front wheel bearings maybe on the way out. What do you guys think?

Cheers
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      06-23-2012, 01:22 AM   #3
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I just had to replace my partners RHF wheel bearing ASM at 60,000kms as it completely failed. Does the noise get worse turning one way or another and quiter in a straight line?.

Bearing replacement inc parts was around $340.00
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      06-23-2012, 04:54 AM   #4
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Quote:
Originally Posted by BM321 View Post
Hi Guru's
I have recently noticed an increase of road noise/resonance coming from the front end (I think) of my E90 320i (110K km). The intensity varies depending on road surface and increases under brakes. I have non standard (non-RFT) 19" wheels and tyres (Kumho 235/35ZR19). The BMW dealer service department said the differential needed replacing at a cost of $2920 (parts only) which I am very sceptical about. I'm thinking maybe the front wheel bearings maybe on the way out. What do you guys think?

Cheers
Next time your in Sydney drop in and i will check it out for you
regards Peter
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      06-23-2012, 05:50 AM   #5
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I had the same problem with my E92 323. I also had Kumho tyres.
The noise was almost gone when I put the standard runflats back on.
I think the problem is the Kumhos. Before you spend a lot of money on wheel bearings and diffs, I suggest you borrow some different wheels and see if the noise disappears.
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      06-23-2012, 06:23 AM   #6
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Simply jacking up the front and turn each wheel by hand will tell you if there's a grumble in the bearings.
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      06-23-2012, 08:40 AM   #7
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I would be trying to fit a donar set of wheels/tyres to test first, as tyres definitely could be your issue if the noise does not change through turns.
Wheel bearings are more likely if your noise changes through turns, but do not rule out the rear differential though as this was the issue on my car.
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      06-24-2012, 07:29 AM   #8
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Thanks for the replys everyone.

I jacked the front end up and rotated the wheels and didn't notice any abnormal noises or grinding. The noise is louder in a straight line and not so loud when turning. I guess this would suggest it's not bearings as lateral load (ie turning) would make it louder.
I suspect that the tyres maybe the problem, and tried to put the old wheels and RFT's back on today but couldn't loosen the wheel nuts (the knuckle draggers at BMW service department must have set the rattle gun to super tight). I'll take it to a tyre place and get them to swap the wheels and I'll let you know how it goes.

Cheers
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      06-24-2012, 09:36 AM   #9
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I'm guessing you have KU31s. They are pretty loud
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      06-24-2012, 10:24 PM   #10
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Quote:
Originally Posted by Jeef Beef
I'm guessing you have KU31s. They are pretty loud
I have had the same problems sounds like a wheel bearing but its normally just tyres that are feathered It seems like the toe is out & the car tyres that are toeing in it seems to be common on E90 s especially with sport suspension like mine I just replaced the tyres in the end & it was worth every cent we are trying to sort out the alignment issues now.
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      06-25-2012, 06:51 AM   #11
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Yes, the Kumho's are KU31's and agree with KUSH, so I think I'll replace the front tyres and see what happens. Can anyone recommend what tyres I should get. I'm happy to pay a little extra to get good quality and a quiet ride.
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      06-25-2012, 08:55 AM   #12
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Quote:
Originally Posted by BM321 View Post
Yes, the Kumho's are KU31's and agree with KUSH, so I think I'll replace the front tyres and see what happens. Can anyone recommend what tyres I should get. I'm happy to pay a little extra to get good quality and a quiet ride.
Michelin Pilot Super Sports off tirerack.com. Shipping is around $250. You'll soon see it's still much cheaper than anything local. That's where I get all my tyres.
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      06-25-2012, 09:00 AM   #13
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Quote:
Originally Posted by BM321 View Post

The BMW dealer service department said the differential needed replacing....
So given that your dealer said that was the problem... before you race out and buy new tyres, wouldn't the logical step be to get a BMW Indy to verify that diagnosis??

Why when you have been told its your diff thats the problem, you're immediately going out to buy a new set of tyres???
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      06-25-2012, 09:38 AM   #14
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Quote:
Originally Posted by QLD View Post
So given that your dealer said that was the problem... before you race out and buy new tyres, wouldn't the logical step be to get a BMW Indy to verify that diagnosis??

Why when you have been told its your diff thats the problem, you're immediately going out to buy a new set of tyres???
I think the easiest diagnosis will be to swap on a new set of wheels. Im hoping my car doesn't run into this problem
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      06-27-2012, 03:06 AM   #15
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Quote:
Originally Posted by QLD View Post
So given that your dealer said that was the problem... before you race out and buy new tyres, wouldn't the logical step be to get a BMW Indy to verify that diagnosis??

Why when you have been told its your diff thats the problem, you're immediately going out to buy a new set of tyres???
The mechanic (read apprentice) noticed the noise on a road test after a service, did no other investigation and assumed it was the diff. As the noise is definately coming from the front end of the car I'm pretty sure its the front tyres. Before I do anything else, I'm getting a wheel alignment and balance and put on some borrowed wheels to either eliminate or confirm the problem.
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      06-27-2012, 03:14 AM   #16
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On the tyre front......has anyone had any experience with Falken FK 452's? I can get some 235/35/19 for $220 each and 265/30/19 for $250 each delivered to Canberra from Tempe tyres, which is reasonably cheap compared to some other brands.
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      06-27-2012, 06:43 AM   #17
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Quote:
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On the tyre front......has anyone had any experience with Falken FK 452's? I can get some 235/35/19 for $220 each and 265/30/19 for $250 each delivered to Canberra from Tempe tyres, which is reasonably cheap compared to some other brands.
They are cheap for a reason. if youre willing to go cheap then why not nankang ns2s? they'll be like 100 a corner.
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      07-03-2012, 10:32 PM   #18
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Falken 452s have rated very highly in Wheels tyre tests in the last few years. I have them on my Golf (225-45-17) and I'm very pleased with them. I also had them on my V6 4WD Passat and they performed well, including during a skidpan session with Rick Bates driver training at Sutton Rd.
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      07-03-2012, 10:38 PM   #19
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Am almost sure it's your tyres, if that's the issue you wouldn't get better than Michelin Pilot S.Sport non runflats on 19"s for comfort and low noise!
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      07-03-2012, 11:15 PM   #20
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doubt it is the tyres, given the noise increases under brake, i'd say worn bushes or CV joints - a common problem for older BMWs.
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      07-03-2012, 11:23 PM   #21
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Front tire irregular wear. I had to have mine replaced when thr car only had 20k miles on it. Terribly loud road noise from them.
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      07-09-2012, 08:51 PM   #22
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How did you go with it ?
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