'Thump' sound from break when reversing

Lnknprkfrk28 · 09-18-2013, 11:42 PM

Hello fellow BMW owners! Hoping you guys could help me out before I take my car in to the dealer. Everytime i reverse for some reason (it seems like the passenger side front break) makes a 'thump' noise. This happens when i press on the breaks of course, you hear it. I had my front breaks changed about 3 months ago, and this has been occuring ever since, or maybe even before but barely noticed it since it doesnt happen while I'm driving. This only happens when I'm reversing back and forth or in nutro sometimes rolling back before i put it into first gear. Any ideas what it could be? Bad break pads? I even had my rotors replaced that same day when they changed the front breaks. My rear breaks are about 20% and am going to change them soon, but thinking about changing all 4 again. Any feedback or resolution would be helpful. I have still been driving the car with no issues, no sensors coming on, no lights at all, all seems fine, just that dam noise!

iBoost · 09-19-2013, 01:31 AM

I had the same "thump" you're experiencing. After getting my brake pads and rotors replaced they forgot to tighten one bolt that holds the caliper to the bracket. I would go in and make sure those are tighten correctly.

Lnknprkfrk28 · 09-19-2013, 07:48 AM

Oh really? And it only happens while reversing and just going back and forth slowly? Also occurs in neutral for me as well, did you experience the same thing? Btw mines a 2012 335i.. Basically brand new! Thanks for your help.

iBoost · 09-19-2013, 12:10 PM

Quote:

Originally Posted by Lnknprkfrk28

Oh really? And it only happens while reversing and just going back and forth slowly? Also occurs in neutral for me as well, did you experience the same thing? Btw mines a 2012 335i.. Basically brand new! Thanks for your help.

Yup. Exactly how you're describing it. Definitely check those bolts that mount that caliper on there.

I found this video that will give you a better idea on which bolts im talking about, the ones he mentions at about 2:10 he calls them the "caliper bracket bolts"

hope that solves your issue.

Lnknprkfrk28 · 09-19-2013, 03:21 PM

I have an appt not this Saturday but next to get it checked out. Thank you!

VTECaddict · 09-19-2013, 10:47 PM

Normal. Floating caliper design.

09-20-2013, 08:20 AM

Quote:

Originally Posted by VTECaddict

Normal. Floating caliper design.

What he said.

Lnknprkfrk28 · 09-20-2013, 09:01 AM

Thanks for the posts guys. Really it's normal? I've thought it's normal too since I've been driving like this practically whole year.

thekidatthebar · 09-21-2013, 12:00 PM

Happens in my gf e46 too. Everyone says its normal, guess its the caliper resetting itself

09-18-2013, 11:42 PM	#1
Lnknprkfrk28 Enlisted Member 6 Rep 31 Posts Drives: 2012 BMW 335I M-Sport Package Join Date: Jan 2013 Location: Sunland, CA iTrader: (0)	'Thump' sound from break when reversing Hello fellow BMW owners! Hoping you guys could help me out before I take my car in to the dealer. Everytime i reverse for some reason (it seems like the passenger side front break) makes a 'thump' noise. This happens when i press on the breaks of course, you hear it. I had my front breaks changed about 3 months ago, and this has been occuring ever since, or maybe even before but barely noticed it since it doesnt happen while I'm driving. This only happens when I'm reversing back and forth or in nutro sometimes rolling back before i put it into first gear. Any ideas what it could be? Bad break pads? I even had my rotors replaced that same day when they changed the front breaks. My rear breaks are about 20% and am going to change them soon, but thinking about changing all 4 again. Any feedback or resolution would be helpful. I have still been driving the car with no issues, no sensors coming on, no lights at all, all seems fine, just that dam noise!
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09-19-2013, 01:31 AM	#2
iBoost Retired e90post Member 135 Rep 3,038 Posts Drives: real slow Join Date: Nov 2009 Location: Las Vegas iTrader: (13)	I had the same "thump" you're experiencing. After getting my brake pads and rotors replaced they forgot to tighten one bolt that holds the caliper to the bracket. I would go in and make sure those are tighten correctly.
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09-19-2013, 07:48 AM	#3
Lnknprkfrk28 Enlisted Member 6 Rep 31 Posts Drives: 2012 BMW 335I M-Sport Package Join Date: Jan 2013 Location: Sunland, CA iTrader: (0)	Oh really? And it only happens while reversing and just going back and forth slowly? Also occurs in neutral for me as well, did you experience the same thing? Btw mines a 2012 335i.. Basically brand new! Thanks for your help.
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09-19-2013, 03:21 PM	#5
Lnknprkfrk28 Enlisted Member 6 Rep 31 Posts Drives: 2012 BMW 335I M-Sport Package Join Date: Jan 2013 Location: Sunland, CA iTrader: (0)	I have an appt not this Saturday but next to get it checked out. Thank you!
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09-19-2013, 10:47 PM	#6
VTECaddict Where'd my VTEC go? 479 Rep 6,067 Posts Drives: 06 330i 6MT Join Date: Mar 2009 Location: Seattle, WA iTrader: (4)	Normal. Floating caliper design. __________________ AW/Terra \| ZSP \| ZPP \| ZCW \| iDrive \| CA Mods: BC BR coilovers \| Blacklines \| M-tech rear \| dual exhaust \| M3 steering wheel \| BMW SSK \| ZHP shift knob \| High-kick CF spoiler \| NBT Retrofit M3 front control arms \| M3 rear guide rods \| Manzo rear toe and camber links \| Monroe rear shock mounts \| Varrstoen ES1 19x9.5+20 Front, 19x11+25 rear
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09-20-2013, 09:01 AM	#8
Lnknprkfrk28 Enlisted Member 6 Rep 31 Posts Drives: 2012 BMW 335I M-Sport Package Join Date: Jan 2013 Location: Sunland, CA iTrader: (0)	Thanks for the posts guys. Really it's normal? I've thought it's normal too since I've been driving like this practically whole year.
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09-21-2013, 12:00 PM	#9
thekidatthebar Enlisted Member 4 Rep 34 Posts Drives: 330i Join Date: Sep 2013 Location: Boston iTrader: (0) Garage List 2006 BMW 330i [0.00]	Happens in my gf e46 too. Everyone says its normal, guess its the caliper resetting itself
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