[akkando]

Originally Posted by andrettifan

Some dealers don't deserve their BMW franchises. Tell them to check for SIB (Service Bulletin) 34-06-15 and replace the damn brake backing plates with the updated ones. Print out these forum postings and give them to the dealer.

I had a nightmare with my selling dealer trying to convince them there was something wrong and that other owners (many posting on this forum) were getting it dealt with successfully. I finally took my car to another dealer who knew immediately what was wrong, replaced the backing plates, and after 1000 miles driving with those updated rear backing plates I have not heard the soda crunch, not once.

Needless to say, after purchasing two new BMWs at the first dealer over the last four years, they will never see me again.

I told mine that I wasn't going to stop complaining and they would eventually be fixing them anyway so can we cut out the middle part of this where I come back over and over and again their tech can't repro the noise over and over until it happens and they finally hear it and fix it?

They were like "yeah but..."

And I was like "okay, do I need to film myself driving by your dealership with the brake shields making a noise like my exhaust is dragging behind the car and explaining on the video that the dealer refuses to fix the issue on a new 50k+ BMW even though I have documented the issue and have supplied the dealer with the updated part number, and then post this video on the forums and car blogs for your future customers to see? Then I get a phone call from BMW this was all a big misunderstanding, please take down the video they will fix it under warranty? Is that how this is going to go down?"

They then said they would do me a favor and fix it without having their tech repro the issue this one time. I held my tongue that they were not doing me a favor, that they should just fix it when it's a well known issue and I had documented it already on video.

Have not heard the soda crunch sound since they installed the new brake shields...

[mWHO]

i've experienced this a dozen times and one time there was actually a flattened soda can under my car

[OrangeCrush]

Originally Posted by Prodigy.

Sounds like it's time for you to find a new dealership.

Originally Posted by MR.

Explain them to search for the PUMA upgrade and then their eyes will open

MR

Originally Posted by andrettifan

Some dealers don't deserve their BMW franchises. Tell them to check for SIB (Service Bulletin) 34-06-15 and replace the damn brake backing plates with the updated ones. Print out these forum postings and give them to the dealer.

I had a nightmare with my selling dealer trying to convince them there was something wrong and that other owners (many posting on this forum) were getting it dealt with successfully. I finally took my car to another dealer who knew immediately what was wrong, replaced the backing plates, and after 1000 miles driving with those updated rear backing plates I have not heard the soda crunch, not once.

Needless to say, after purchasing two new BMWs at the first dealer over the last four years, they will never see me again.

I will send them this info. I've been wanting to switch dealers for a while because this wasn't the first time but since I bought our BMWs from this one we get loaners when we take our cars in and other stuff like that. Plus, it's really easy to become "first" on the list at this dealer...I was able to get their only 1M and their first M2.

[MR.]

My dealer is brilliant right now, which does not give you any assurance for the future but at least they did what I asked and answered my questions professionally. I am really happy with them right now. All fine so far, and I am number 1 for both the M2 CS and the rumored M2 GTS.

For record, no noise so far! Nothing...

MR

[mokrunka]

Originally Posted by heart_doctor

I just took delivery of my 2017 m2, DCT, 800 miles on the car first service scheduled for Thursday and I have definitely noticed some interesting noises from the rear of the car. The occasional thud and most recently when I was pulling into a parking lot at a very slow speed (entrance was at an incline and I didn't want to bottom out the front end) there was a screech from the rear of the car. Happen when I was about halfway in and came to a stop and pushed the gas pedal to get the rest of the way in. Pretty loud.

Is this normal?? I had a 2011 e92 m3 for 6 years and never heard anything like this.

I've heard this as well, in a similar scenario. My driveway is quite steep, so I have to back out at an angle to keep from scraping the front airdam. Sounds almost like maybe one wheel is coming off the ground/not turning as much as the other, and the diff is trying to compensate. Gonna have them check it when I do the break-in in 500 miles.

That, and I have an odd rattle on the rear shelf (not speakers).

[serrated]

I complained about this last week when I took it in for scheduled oil change.

They said they can't do anything to fix it but they can get any rocks out that are currently in it. I said ok.

They called me the next day and said there's an upgrade kit to the rotor shield that is closer to the rotor that prevents the rocks and said that they've done a few of these and none of them came back with more complaints.

So far? I haven't heard the "crunch" or the REALLY loud scraping sounds, but I do occasionally hear a slight rubbing/brushing sound from the back right rotor.

I haven't looked into what's causing yet, but it's still a vast improvement over stock.

[Doji desu]

Still havent had my backing plates done, waiting on some other bits to come in... anyway I was thinking... for me the noise typically comes from the left, serrated says right so are we both talking passenger side? My car is right hand drive. Would make sense that small stones and debris is more prevalent on the passenger side. Can anyone else comment?

[nopslide]

Finally got mine done. No noises but its only been a couple days.

Notes say:

Followed SIB 34 06 15.
Replaced rear brake dust shields with new style part.


2 33-41-2-282-675 Angular-Contact Bal
8 33-40-2-284-592 Collar Screw
2 33-41-1-133-785 Collar Nut
1 34-20-8-053-265 Protection Plate LE
1 34-20-8-053-266 Protection Plate RI

[bmwv]

I got mime replaced and they messed up the paint on one of the calipers. Probably they droped it.

[jtcsifl]

My car hit the dealer lot on Thursday March 16th & I bought it on 3/25. I thought it would've been built with the new shields/plates but no. I had a pebble in it within the first week. It fell out on the way to the dealer to have it looked at. I currently have pebbles in both rear plates. I'm just going to call them within a couple of weeks of my 1200 mi service to order the replacements.

[MR.]

Since it was fitted, no problems whatsoever. I have not driven a lot, but so far no noises.

MR

[Prodigy.]

Had the noise return for the first time today since getting the new shields fitted.

[nszzya]

I've posted on this before in this thread with no replies. I'm still wondering what the pebble is scraping and if that isn't causing some sort of damage. Anybody?

[MR.]

Originally Posted by nszzya

I've posted on this before in this thread with no replies. I'm still wondering what the pebble is scraping and if that isn't causing some sort of damage. Anybody?

Inside of the brake disc? That is the only thing I can think of. I think some people mentioned seeing some light scratches on the inside of the disc, but I am not 100% sure.

MR

[Gaviin]

Can anyone confirm that they've had this issue and/or had the dealer fix it on a 2017 production date car? When I picked up my week 8 build, the dealer said the issue was addressed from the factory for anything built in 2017. Not entirely convinced...

[akkando]

Originally Posted by Gaviin

Can anyone confirm that they've had this issue and/or had the dealer fix it on a 2017 production date car? When I picked up my week 8 build, the dealer said the issue was addressed from the factory for anything built in 2017. Not entirely convinced...

My car was built Oct 29 2016 I think but it's a MY17 car. It had the issue and was fixed with the new brake shields. Heard the noise a lot before the fix, not once after.

[serrated]

Originally Posted by Gaviin

Can anyone confirm that they've had this issue and/or had the dealer fix it on a 2017 production date car? When I picked up my week 8 build, the dealer said the issue was addressed from the factory for anything built in 2017. Not entirely convinced...

They're lying. Mine is a 17 and they replaced the rears with new ones that go all the way around the rotor and I haven't heard a peep since they replaced them and they told me that they've not had a single person come back with the issue after the replacement. (I had to take mine back one time because there was a rock still in there jammed next to the caliper that was there from before the updated shield was installed--once they pulled the caliper off, the rock came out, and I haven't heard a single peep since then.)

About damn time my nearly $80k (after upgrades/tax) bimmer stops sounding like a total beater.

Also, I feel the need to plug my dealership. Baron BMW (in Kansas City suburbs on the Kansas side) has been really top-notch as far as customer service goes.

[DoggieHowser]

Originally Posted by serrated

They're lying. Mine is a 17 and they replaced the rears with new ones that go all the way around the rotor and I haven't heard a peep since they replaced them and they told me that they've not had a single person come back with the issue after the replacement. (I had to take mine back one time because there was a rock still in there jammed next to the caliper that was there from before the updated shield was installed--once they pulled the caliper off, the rock came out, and I haven't heard a single peep since then.)

About damn time my nearly $80k (after upgrades/tax) bimmer stops sounding like a total beater.

Also, I feel the need to plug my dealership. Baron BMW (in Kansas City suburbs on the Kansas side) has been really top-notch as far as customer service goes.

I think he meant those built in 2017 as opposed to a model year 2017 which began production from Jul 2016.

You mentioned doing 7000 miles in Feb? And touted 1200 miles/month so yours would likely be built in 2016 as a 2017 model year.

[serrated]

Originally Posted by DoggieHowser

I think he meant those built in 2017 as opposed to a model year 2017 which began production from Jul 2016.

You mentioned doing 7000 miles in Feb? And touted 1200 miles/month so yours would likely be built in 2016 as a 2017 model year.

I'm at 10600 miles now

[Doji desu]

Had mine changed today.

[Gaviin]

Originally Posted by DoggieHowser

I think he meant those built in 2017 as opposed to a model year 2017 which began production from Jul 2016.

Correct. My dealer said anything with a production date this year doesn't need the parts replaced. I'm still skeptical, but I don't drive a ton and rarely on roads with many loose rocks. So I've never experienced it, but would obviously like to get the new parts if they're needed.

[whitmont]

I've experienced this a few times last summer but nothing so far since I pulled the car out of hibernation until today. Has anybody experienced this lasting longest than just a quick crunch wound? Mine lasted for about 10 minutes off and on. I made a video and will post later.