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Technical Topics Suspension / Chassis / Brakes 2020 M340i Braking Issues

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      09-03-2019, 09:57 PM   #1
DanVlnStud
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2020 M340i Braking Issues

Anybody experiencing noisy stop and go braking? It's becoming a challenge to brake smoothly and silently, and its starting to irritate me. The brakes grab and make a creaking and farty noise right before a complete and abrupt stop, and then upon release, they make the same sticky farty creaking noise, and its almost impossible to stop smooth.
I'm kind of frustrated because I had a 2019 330xdrive rental for two weeks that didn't have these issues.

My old e60 made those same sounds, but that car was old.

Does this car come with carbon-ceramic brakes? The SA said they make those sounds naturally. I didn't know the 2020 M340i came with carbon-ceramic brakes stock.

I'm currently driving a loaner that also doesn't have the same issues. I can't get the loaner which is another 330i to make that same sounds no matter how hard I try.

Someone, please tell me this is not normal.
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      09-04-2019, 05:02 AM   #2
Jebk
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Could be glazed discs/pads. Have you tried giving it an Italian tuneup with a couple of hard stops?
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      09-04-2019, 07:15 AM   #3
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Carbon ceramic lol, no it does not come with those.
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      09-15-2019, 11:30 PM   #4
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I went to pick up my car and showed one of the mechanics the problem ina few seconds just pulling out of the driveway, and he instantly said they would inspect the issue another day. Got a call from the SA and he said it was completely normal, and I should call BMW Canada about the issue if I want. When I got the car back, about a quarter tank of my gas was gone and they put about 50km on my speedometer. This is Parkview BMW, wtf! I'm about to make videos about the issues.
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      09-16-2019, 09:55 AM   #5
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Quote:
Originally Posted by DanVlnStud View Post
I went to pick up my car and showed one of the mechanics the problem ina few seconds just pulling out of the driveway, and he instantly said they would inspect the issue another day. Got a call from the SA and he said it was completely normal, and I should call BMW Canada about the issue if I want. When I got the car back, about a quarter tank of my gas was gone and they put about 50km on my speedometer. This is Parkview BMW, wtf! I'm about to make videos about the issues.
My f32 435i with blue m sport brake had squeaking squealing problem too. Dealers all say it was normal because they don't want to do shit. I solved it myself by applied brake lubricant and squeal was much less often. Then i replaced the pad with ebc redstuff in 3rd year, it went away completely.
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      09-22-2019, 12:06 AM   #6
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Quote:
Originally Posted by tommytexter View Post
My f32 435i with blue m sport brake had squeaking squealing problem too. Dealers all say it was normal because they don't want to do shit. I solved it myself by applied brake lubricant and squeal was much less often. Then i replaced the pad with ebc redstuff in 3rd year, it went away completely.

Hey thanks, but I'm leasing the car. I don't want to spend money on the thing. I just want a new car ride while I have it.
The SA did nothing for me as well. I'm guessing they are just worn out. I'm sure they launched the shit out of my car before they sold it to me. Today I heard my first squeak from the brakes. How long do these carbon-ceramic pads last on average? After 1.5 months of normal driving, I would think it's a little early. More to bitch about at the dealer.

I miss my BMW dealer in the Voorhees NJ, the service is like night and day. Every time I went for service they would give the latest new car model to enjoy for days, and they fixed so much for free. Unbelievable how poor the service is here in Toronto. Do they not get paid as much?
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      09-22-2019, 11:11 AM   #7
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2100 miles no break issues on my M340i. knock on wood. in fact they are great
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      09-23-2019, 12:08 PM   #8
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Noise is a side effect of semi-metallic brake pads. Typically, the more aggressive the pads, the higher the noise level. Do you have the Cooling and High Performance Tire Package? It's possible that the pad compound is more aggressive with that package.
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      10-25-2019, 12:12 AM   #9
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Quote:
Originally Posted by The Outrage View Post
Noise is a side effect of semi-metallic brake pads. Typically, the more aggressive the pads, the higher the noise level. Do you have the Cooling and High Performance Tire Package? It's possible that the pad compound is more aggressive with that package.
Yes, I have the cooling and High-Performance tire package, but I don't think it has anything to do with that. It's near impossible to stop smoothly and silently, especially when I have Auto H, and the Auto engine on/off activated in traffic. Right before I come to a complete stop, the brakes grab too early, and then the engine cuts off, which makes the car stop abruptly and causes the suspension to titer forward and back and when I come out of a stop, the brake doesn't release early enough, and I get nasty rubbing/clunking noise.
It's still happening, and the dealer continues to say its normal, and are too cheap to inspect it.

The worst part is I am a musician and part-time audio engineer and the sound bugs the crap out of me every time. At some point, I will record the issue with some pro mics and share the issue with you all. I'm sure this is a problem only I am facing, the M340i is an excellent car, but just the one I have has some lemon brakes or something. I am already looking forward to exchanging it when the new M3 comes out. I'm sure it won't have the same issues.
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      11-21-2019, 10:20 AM   #10
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Quote:
Originally Posted by DanVlnStud View Post
I went to pick up my car and showed one of the mechanics the problem ina few seconds just pulling out of the driveway, and he instantly said they would inspect the issue another day. Got a call from the SA and he said it was completely normal, and I should call BMW Canada about the issue if I want. When I got the car back, about a quarter tank of my gas was gone and they put about 50km on my speedometer. This is Parkview BMW, wtf! I'm about to make videos about the issues.
Normal for them to drive your car to "replicate the issue". However my dealer always asks me if they can have my permission before taking it out on the road.

Like somebody else said, take it out and give it a few hard stops. That will sometimes solve some squeaking noises.
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      11-26-2019, 08:35 PM   #11
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Have not had any issues with my breaks, knock on wood. In fact they stop great
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      12-09-2019, 02:06 PM   #12
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Maybe try disabling the auto hold function and brake normally when driving then aggressively while the AutoStart Stop is disabled?
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      12-10-2019, 10:40 AM   #13
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Quote:
Originally Posted by WXdrivefun View Post
Maybe try disabling the auto hold function and brake normally when driving then aggressively while the AutoStart Stop is disabled?

I think I tried almost everything. With the auto-hold function on, It's less grabby if I accelerate a bit more aggressively, with it off, I have to stop ever so carefully, and with a little luck, I can finish it smoothly and silently.
The worse is when I use the auto park function or traffic assist. Every stop and go is a bit jerky, and I get that grabby rubbing sound.
When I do a three-point turn, It the noisiest. Brakes grabbing and something creaking when I turn the steering wheel full crank. Like an old car with worn-out suspension components. Please try it and listen.
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