Weird thump in speakers

PatTheCarNut · 07-20-2023, 11:44 AM

So my wife is driving home from work and her radio starts making a heartbeat paced thump. Whatever she listens to cuts out on the beat. Shut the car off and it thumps till the click under the hood shuts things off totally. I am nowhere close to experienced with BMW audio but this sounds like a failed amp to me. I can find them on ebay and it seems by a search that they are just plug and play, no programming.

Anyone have any thoughts if I am on the right track?

JGray_22 · 05-12-2024, 09:43 PM

Any luck in diagnosing this? Have a similier issue going on.
Can figure it out and not sure if it a water/moisture issue from trunk

PatTheCarNut · 06-04-2024, 06:22 AM

No fix yet. I found an amp on ebay that I swapped out only to last about 3 days before the noise came back. I swapped it back and was fine for at least 6 months. Now temps are rising with summer coming and it's back.

This has to be heat related.

PatTheCarNut · 06-07-2024, 08:24 PM

I did find a few leads. It’s likely something to do with the JBE or sometimes called BCM.

Still tracking down info.

07-20-2023, 11:44 AM	#1
PatTheCarNut Registered 0 Rep 4 Posts Drives: BMW 428i Xdrive Join Date: May 2022 Location: Indiana iTrader: (0)	Weird thump in speakers So my wife is driving home from work and her radio starts making a heartbeat paced thump. Whatever she listens to cuts out on the beat. Shut the car off and it thumps till the click under the hood shuts things off totally. I am nowhere close to experienced with BMW audio but this sounds like a failed amp to me. I can find them on ebay and it seems by a search that they are just plug and play, no programming. Anyone have any thoughts if I am on the right track?
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05-12-2024, 09:43 PM	#2
JGray_22 New Member 0 Rep 20 Posts Drives: 2018 340i XDrive Join Date: Dec 2022 Location: PA iTrader: (0) Garage List 2016 BMW 428i [10.00] 2018 BMW 340i [9.00]	Any luck in diagnosing this? Have a similier issue going on. Can figure it out and not sure if it a water/moisture issue from trunk
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06-04-2024, 06:22 AM	#3
PatTheCarNut Registered 0 Rep 4 Posts Drives: BMW 428i Xdrive Join Date: May 2022 Location: Indiana iTrader: (0)	No fix yet. I found an amp on ebay that I swapped out only to last about 3 days before the noise came back. I swapped it back and was fine for at least 6 months. Now temps are rising with summer coming and it's back. This has to be heat related.
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06-07-2024, 08:24 PM	#4
PatTheCarNut Registered 0 Rep 4 Posts Drives: BMW 428i Xdrive Join Date: May 2022 Location: Indiana iTrader: (0)	I did find a few leads. It’s likely something to do with the JBE or sometimes called BCM. Still tracking down info.
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