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Humming noise from rear of the car.

Dextros
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Humming noise from rear of the car.

Post by Dextros » Sun Jul 09, 2017 12:54 am

[youtube]https://youtu.be/Zq0TB4IpT5A[/youtube]

Please see the above link to the video for my issue. I've read a couple of posts on here that may resemble the same issue as mine but without any evidence attached. Has anyone had the issue and have had it resolved?
I'd love to hear from you.

I've also noticed that the noise appears more prominent next to the rear driver's side wheel. Sounds like it may be coming from behind there.

Thanks

Dean

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bob20124
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Humming noise from rear of the car.

Post by bob20124 » Sun Jul 09, 2017 11:55 am

It sounds like the the LPFP (low pressure fuel pump).
2011 35i BMS low and high side OCC, BMW 550i Clutch, CDV delete, Custom tune by BQ Tuning, ER Charge Pipe w/Tial BOV, ER Comp. FMIC, K&N drop in, 40W LED Halo, LCI side markers, M-Factory LSD, Stubby, Windrestrictor. Dyno'd 405WHP, 458Lb/FT

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ronk
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Humming noise from rear of the car.

Post by ronk » Sun Jul 09, 2017 12:25 pm

bob20124 wrote: Sun Jul 09, 2017 11:55 am It sounds like the the LPFP (low pressure fuel pump).
It certainly does and it's as bad as I've ever heard !
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

Dextros
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Humming noise from rear of the car.

Post by Dextros » Sun Jul 09, 2017 1:53 pm

Thanks guys!

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ronk
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Humming noise from rear of the car.

Post by ronk » Sun Jul 09, 2017 1:57 pm

Forgot to ask, does the noise change when the tank levels change?
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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MrPT
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Humming noise from rear of the car.

Post by MrPT » Sun Jul 09, 2017 2:44 pm

Bees?
2008 Z4MC: heavy wheels | crap suspension | skittish rear end | wobbly engine | not enough induction noise | underwhelming turn in | inconsistent braking | lardy battery | chubby steering wheel
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Dextros
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Humming noise from rear of the car.

Post by Dextros » Sun Jul 09, 2017 3:26 pm

It doesnt happen all the time but know that you've mentioned it it does seem worse with a full tank.

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Ewazix
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Humming noise from rear of the car.

Post by Ewazix » Sun Jul 09, 2017 4:30 pm

Bored hoe in the trunk?
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weegeoff
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Humming noise from rear of the car.

Post by weegeoff » Sun Jul 09, 2017 4:54 pm

It could be Bee Pee in your tank :?

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Dr.Gonzo
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Humming noise from rear of the car.

Post by Dr.Gonzo » Wed Jul 12, 2017 10:15 pm

Hi. Can you confirm that you hear that humming noise only when around 1/4 fuel left in your fuel tank ?
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Dextros
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Humming noise from rear of the car.

Post by Dextros » Sun Jul 16, 2017 1:24 pm

Dr.Gonzo wrote: Wed Jul 12, 2017 10:15 pm Hi. Can you confirm that you hear that humming noise only when around 1/4 fuel left in your fuel tank ?
No, the humming noise is more noticeable when i have a full tank.

EssexZed

Humming noise from rear of the car.

Post by EssexZed » Fri Jul 21, 2017 12:17 am

That's definitely the pump in the fuel tank. I had exactly the same issue on a 2010 23i. Like you describe, the noise was worse with a full tank of fuel. It's a well know problem and fortunately for me my car was under warranty. It's an expensive fix as the tank has to be removed by firstly removing the exhaust and dropping the rear suspension. The dealer had the car for a day and a half and said the cost of the repair was in excess of £1000.

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Humming noise from rear of the car.

Post by extrablatt » Sat Jul 29, 2017 11:52 am

Wow, thanks for this thread! I was about to post the same thing, and the description of the noise sounds exactly as you've described. For me, it's a whine, which is noticeable each time I refuel.

I first noticed it in May, after having the super from Sainsbury's for a couple of tanks, then went for Shell VPower to see if it had any difference.

The frustrating thing is the dealer can't seem to reproduce the noise!

Any suggestions from those who have had this dealt with? I'm about to book it into a different dealer to see if they can't find the problem.
2013 E89 35iS Mineral White
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Gone: 2010 E89 23i Space Grey

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ronk
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Humming noise from rear of the car.

Post by ronk » Sat Jul 29, 2017 1:03 pm

Mine was a 2010 3.0l
75% full tank and warmed up - very noticeable on idle - it was a warranty fix.
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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Humming noise from rear of the car.

Post by extrablatt » Sat Jul 29, 2017 1:07 pm

Thanks Ronk! It's booked in for a week Monday. Back to the same dealer that found and fixed my injectors.
2013 E89 35iS Mineral White
19" 326M | heated seats & wheel | pro nav & hifi | stubby

Gone: 2010 E89 23i Space Grey

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