Arm
Posts: 24
Joined: Tue Jan 07, 2020 5:53 pm

Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 11:59 am

My i3s is overall a pretty quiet car. It has some road noise on rough surfaces from the tires but on smooth surfaces it's very quiet.

But on rough roads, there is a symphony of rattles that are very plasticky in nature that really annoys the hec out of me. I get the fact that the car has a different chassis build that creates a different type of resonance and interior noise when compared to a regular steel structure.

But the sounds I'm talking about are genuine rattles that come from the door panels, the steering column, side skirts/cladding on the outside, the air vents, etc. There is a lot of plastic cladding on this car that is attached by plastic push pins or something like that. There is a lot of tolerance and play.

I noticed just thumping my hand along the side skirts/paneling along the bottom sides of the car create lose plastic rattling. These aren't lose...they just have a lot of play between them. I realized that a lot of the sounds are from these types of fits and finish. It's a shame because the car is well made.

Anyone done their own sound rattling improvements they can share?

Deutsch100
Posts: 76
Joined: Mon Sep 30, 2019 2:28 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 3:39 pm

My 2019 i3S was the most rattly car I have owned in decades. On smooth roads and freeways....very quiet though.

On roads that were not perfect....OMG! Dash board, steering column (or under it), driver and passenger doors, side panels, windows......RATTLE, RATTLE. Plastic on plastic sounds and just terrible.
2019 i3 Sport Rex. Capparis White/Frozen Blue. 20" black wheels. Tech & Driving Assit Pkg, Moonroof. Deka World.

Arm
Posts: 24
Joined: Tue Jan 07, 2020 5:53 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 3:43 pm

Deutsch100 wrote:
Thu Feb 13, 2020 3:39 pm
My 2019 i3S was the most rattly car I have owned in decades. On smooth roads and freeways....very quiet though.

On roads that were not perfect....OMG! Dash board, steering column (or under it), driver and passenger doors, side panels, windows......RATTLE, RATTLE. Plastic on plastic sounds and just terrible.
Yes I've noticed the steering column rattle...it's really bad going over harsh bumps or what not where their is substantial thumping...it's like plastic plates crashing together...I don't get it. Doesn't BMW test these cars out before they release them during design as well as assembly? Don't the engineers notice these things?

Deutsch100
Posts: 76
Joined: Mon Sep 30, 2019 2:28 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 4:14 pm

I was beyond disappointed in a 2019 BMW, costing almost $60k. BMWs I have been in and owned, many costing much less had better interior build quality!!!
2019 i3 Sport Rex. Capparis White/Frozen Blue. 20" black wheels. Tech & Driving Assit Pkg, Moonroof. Deka World.

electronchaser
Posts: 71
Joined: Fri Nov 08, 2019 3:14 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 6:12 pm

Where were these i3's driven?

I'll also confirm, on smooth roads, its like butter, like one of the smoothest rides. Not any worse than a 5 or 7 series. On heavily pitted or roads with potholes, cracks, expansions, etc its pretty harsh. Almost feels like something's going to break.

I've got a BEV, I've found whenever I've got the vehicle loaded with heavy cargo (often), hundreds of pounds worth, (I put so much cargo, that the rear tires only fit two fingers between tire and wheel well. When empty I can fit 4 fingers) it handles so much better in terms of comfort and smoothness regardless of surface condition of roads. Meaning even rattles are minimized.

In fact last time I jumped in and forgot if I was in the 330e or i3. it felt that solid going over crap roads. Obviously you get dinged in energy consumption with more weight in vehicle, but it does make it feel like a much more solid ride. But its just that, most avg premium cars are about 3500ish lbs curb weight, that extra 500 lbs makes a massive difference in rebound and bounces the suspension.

Most recent time I had 420lbs of cat litter in the car (10x 42lbs ). + 2 adults. 60 mile trip, smooth as my 330e, if not smoother.


In regards to rattles , You've gotta take the car apart to really appreciate and then remedy the pitfalls of the structure and assembly. I've gutted a good portion already, And its missing a lot. Driving around with the door panels off. the road noise was insane. Lining the panels in 1/8 inch CCF and putting them back in already made a perceivable difference at highway speed noise intrusion.

panels back off, and Now, the thermoplastic pieces are getting treated with dampening material, already makes an incredible difference when shutting the doors, sounds like a proper bmw thud, like how the rear doors on the i3 shut with that classic bmw thud (reminds me of heavy 7 series doors closing). They'll be supplemented with 1/8 thick layers of CCF and MLV. the nice thing about the i3 doors is that the shape allows plenty of clearance with window so you can actually lay thicker material. If doing it again I'd order 6 or 8mm foam instead of the 4mm that I got.
But I'm going 3 layers of foam, One on the outer skin, one on the plastic inner cover beneath that white insulation material. and the last layer on the inside part of the door panel. I cant imagine any rattles afterwards.
Am I trashing it?, absolutely, but with love, like every other BMW I've owned.
Rondel stands for something, and I fully utilize all the non neutered abilities its got.
Takeaway. This is an amazing piece of engineering. And I'm not impressed with 'stuff'

electronchaser
Posts: 71
Joined: Fri Nov 08, 2019 3:14 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 6:15 pm

hahah, what I was trying to relay is a lot of the rattles and crap are from the inability to dampen road conditions. Everything gets projected upwards through the car. when weight it added, it dampens the rattles and squeaks since the energy is dampened before it can reach dash, steering, etc.

So add weight and sound dampening material. world of diff. :)
Am I trashing it?, absolutely, but with love, like every other BMW I've owned.
Rondel stands for something, and I fully utilize all the non neutered abilities its got.
Takeaway. This is an amazing piece of engineering. And I'm not impressed with 'stuff'

Deutsch100
Posts: 76
Joined: Mon Sep 30, 2019 2:28 pm

Re: Identifying Interior/Exterior Rattles

Thu Feb 13, 2020 7:27 pm

Great work electronchaser. A friend did a similar thing you did (foam) on his last few Miatas. Made a huge difference!
2019 i3 Sport Rex. Capparis White/Frozen Blue. 20" black wheels. Tech & Driving Assit Pkg, Moonroof. Deka World.

electronchaser
Posts: 71
Joined: Fri Nov 08, 2019 3:14 pm

Re: Identifying Interior/Exterior Rattles

Sat Feb 15, 2020 7:37 am

Deutsch100 wrote:
Thu Feb 13, 2020 7:27 pm
Great work electronchaser. A friend did a similar thing you did (foam) on his last few Miatas. Made a huge difference!
Many thanks! It's fun to see how the car came together, shortcomings and all :) Great learning experience. You also come to appreciate the unconventional approaches they took since the construct of the vehicle is so diff. You can see where the weight savings from the first gen 60ah i3s just carried over to the larger packed upgrades, when there was enough buffer at that point to address some of the excluded necessities (rattles, dampening, etc).

DId you end up picking up another i3?
Am I trashing it?, absolutely, but with love, like every other BMW I've owned.
Rondel stands for something, and I fully utilize all the non neutered abilities its got.
Takeaway. This is an amazing piece of engineering. And I'm not impressed with 'stuff'

Deutsch100
Posts: 76
Joined: Mon Sep 30, 2019 2:28 pm

Re: Identifying Interior/Exterior Rattles

Sat Feb 15, 2020 8:50 am

Electronchaser....I did not get another i3S when BMW bought back my '19. I got a new Jaguar I-Pace HSE. Love, love it. Build quality and materials match Bentley or Rolls-Royce and you can hear a pin drop even driving on horrible roads.

I can honestly say, besides my Phantoms and full size Range Rovers, I have never had such a rattle free car as this Jaguar. I am shockingly blown away with the build quality. Mind boggling tight and perfect!
2019 i3 Sport Rex. Capparis White/Frozen Blue. 20" black wheels. Tech & Driving Assit Pkg, Moonroof. Deka World.

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