Vibration at 55mph after brake pads replacement?

bfiv8 · 11-25-2023, 10:55 AM

Hello everyone,

I've replaced both brake pads last week and I'm experiencing a noticeable vibration at a constant speed between 55 and 65mph right after the front brake pads replacement. Didn't notice any vibration when I left my car at the shop to let them perform a replacement of rear brake pads in which I'm assuming that something went wrong during front pads replacement (because fronts were replaced the next business day). Even the rear seat passengers can feel the vibration, although it is more prominent on the front seats. This happens with no pedal engagement, so basically the vibration is present during coasting at a constant speed. Going beyond 65mph or below 55mph gives no problem at all, but the vibration is present at 55mph the most and gradually goes down until it hits 65mph when it disappears.

I did some research over this week and it seems like the existing problem corresponds to the brakes (either it be warped rotors or calipers not engaging properly. I also found out that the car might need re-balancing of the wheels/tires to let the vibration go away but it was quite odd given that mine was performed with a road-force balancing last week along with replacement of rear brake pads. Maybe low thread on rear tires, but I doubt it'll be the case since the vibration suddenly came up after the replacement of front brake pads.

I need some insights from you guys. What might be some culprits? Any help would be greatly appreciated 🙏🏻 Happy belated thanksgiving yall!

jpowers36 · 11-25-2023, 11:44 AM

How many miles on it?

Stag77 · 11-25-2023, 02:52 PM

It could be a lot of things, unfortunately, like worn tires or poor alignment. My first guess would be the tires being unbalanced, but you've just had them balanced. Maybe have the balance checked to make sure it was performed properly?

I highly doubt it's your rotors, as you'd have felt them long before switching pads. I'd say your best bet is to bring it back to the shop and raise your concerns with them.

bfiv8 · 11-25-2023, 03:03 PM

Quote:

Originally Posted by jpowers36

How many miles on it?

Hey dude, got 34k miles on it!

bfiv8 · 11-25-2023, 03:05 PM

Quote:

Originally Posted by Stag77

It could be a lot of things, unfortunately, like worn tires or poor alignment. My first guess would be the tires being unbalanced, but you've just had them balanced. Maybe have the balance checked to make sure it was performed properly?

I highly doubt it's your rotors, as you'd have felt them long before switching pads. I'd say your best bet is to bring it back to the shop and raise your concerns with them.

Will definitely check with the shop on monday! It was super weird as all the vibration suddenly came up after front brake pad replacement

Bc2005 · 11-26-2023, 06:55 AM

Have them also check the tires over very carefully.

Had a similar problem once after BMW service and it turned out to be a large diameter screw/bolt that one tire picked up from the service bay floor. It wasn’t long enough to cause a puncture, but big enough to put the tire out of balance.

11-25-2023, 10:55 AM	#1
bfiv8 New Member 3 Rep 17 Posts Drives: '20 M340i, '18 971 4S Join Date: Sep 2022 Location: Chicago, IL iTrader: (0)	Vibration at 55mph after brake pads replacement? Hello everyone, I've replaced both brake pads last week and I'm experiencing a noticeable vibration at a constant speed between 55 and 65mph right after the front brake pads replacement. Didn't notice any vibration when I left my car at the shop to let them perform a replacement of rear brake pads in which I'm assuming that something went wrong during front pads replacement (because fronts were replaced the next business day). Even the rear seat passengers can feel the vibration, although it is more prominent on the front seats. This happens with no pedal engagement, so basically the vibration is present during coasting at a constant speed. Going beyond 65mph or below 55mph gives no problem at all, but the vibration is present at 55mph the most and gradually goes down until it hits 65mph when it disappears. I did some research over this week and it seems like the existing problem corresponds to the brakes (either it be warped rotors or calipers not engaging properly. I also found out that the car might need re-balancing of the wheels/tires to let the vibration go away but it was quite odd given that mine was performed with a road-force balancing last week along with replacement of rear brake pads. Maybe low thread on rear tires, but I doubt it'll be the case since the vibration suddenly came up after the replacement of front brake pads. I need some insights from you guys. What might be some culprits? Any help would be greatly appreciated 🙏🏻 Happy belated thanksgiving yall! __________________ '20 M340i DAW Gen 2 Flow Max 93 oct custom tuned by Shoup
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11-25-2023, 11:44 AM	#2
jpowers36 Lieutenant 218 Rep 410 Posts Drives: 2020 BMW M340i xDrive Join Date: May 2021 Location: TN iTrader: (0)	How many miles on it? __________________ 2020 M340i xDrive - Mineral Grey Metallic/Cognac - MG Flasher Stage 2 OTS 93 \| XHP Stage 3 \| AA DP \| Valvemaster \| MST 2008 Infiniti G37S Coupe 6MT - Black/Black IG: jpowers36
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11-25-2023, 02:52 PM	#3
Stag77 Private 94 Rep 90 Posts Drives: '24 M340i XDrive Join Date: Oct 2023 Location: NY iTrader: (0)	It could be a lot of things, unfortunately, like worn tires or poor alignment. My first guess would be the tires being unbalanced, but you've just had them balanced. Maybe have the balance checked to make sure it was performed properly? I highly doubt it's your rotors, as you'd have felt them long before switching pads. I'd say your best bet is to bring it back to the shop and raise your concerns with them.
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11-26-2023, 06:55 AM	#6
Bc2005 First Lieutenant 317 Rep 395 Posts Drives: 2021 M340i Join Date: Jun 2021 Location: Virginia iTrader: (0)	Have them also check the tires over very carefully. Had a similar problem once after BMW service and it turned out to be a large diameter screw/bolt that one tire picked up from the service bay floor. It wasn’t long enough to cause a puncture, but big enough to put the tire out of balance.
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