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      02-14-2014, 06:50 PM   #1
p66
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How much does the rear seat weigh?

Anyone know how much the seat bottom and seat back weighs? How hard is it to remove and reinstall?

Thx
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      02-14-2014, 09:46 PM   #2
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I'll weigh this weekend. THe bottom cushion is pretty light, but the two back sections are much heavier.

Neil
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      02-15-2014, 12:09 AM   #3
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They are reported in the 50-55lb range
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      02-15-2014, 01:02 PM   #4
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Hi, only the bottom is 11kgs, tested myself for a trackday.
Don't know about the backs....
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      02-27-2014, 08:07 AM   #5
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This is what I have measured so far. The ones with a tilde are not exact because I measured them inaccurately on an analogue bathroom scale. The rest were measured on a digital scale.

E82 Weights
Front M-Sport Seats ~ 30kg
Rear Seat Bottom Cushion - 7.2kg
Rear Seat Back Cushion - 14.5kg

Rear Side panels ~1kg
Rear Shelf with Speakers ~1.5kg
Front Door panel ~4kg
Arm Rest -2.6kg

Car Mats - 2.5kg
Trunk Lid Trim - 0.8kg
Trunk Floor - 2.5kg
Trunk L + R Liner - 2.2kg
B pillar L + R - 0.7kg
C Pillar L + R - 0.6kg
Under Dash Plastic Trim L+R - 1.1kg

Under Rear Seat Carpet 1.0kg
Under Rear Seat Lateral Carpet L+R - 0.6kg
Rear Floor Carpet - 5.1kg
Front Floor Carpet - 6.7kg

Air Conditioning
Evaporator - 1.5kg
Condenser - 2.1kg
Coolant Lines - 1.5kg
Heater Box Assy - 3.5kg
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      02-27-2014, 01:19 PM   #6
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Quote:
Originally Posted by froop View Post
This is what I have measured so far.

E82 Weights
Front M-Sport Seats ~ 30kg
Rear Seat Bottom Cushion - 7.2kg
Rear Seat Back Cushion - 14.5kg

are these numbers per seat cushion/seat? or are the measurements for the entire rear seat bottom and back respectively? (same question for the M-Sport seats)

thanks
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      02-27-2014, 01:29 PM   #7
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Quote:
Originally Posted by ace11 View Post
are these numbers per seat cushion/seat? or are the measurements for the entire rear seat bottom and back respectively? (same question for the M-Sport seats)

thanks
Quite certain it's for the full rear seat. The bottom is a single piece and, at least on the 1M, the back portion is two pieces.

Neil
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      02-27-2014, 01:42 PM   #8
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Quote:
Originally Posted by MDORPHN View Post
Quite certain it's for the full rear seat. The bottom is a single piece and, at least on the 1M, the back portion is two pieces.

Neil
yea i know about the rear seats, but still the numbers seem odd, cus i remember that even just one of rear parts was WAY heavier than the rear seat cushion... so to me 14kg for both rear parts vs 7kg seat cushion just doesnt make sense unless each rear part is 14kg.

also 30kg for each front seat or both together?
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      02-27-2014, 01:50 PM   #9
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Quote:
Originally Posted by ace11 View Post
yea i know about the rear seats, but still the numbers seem odd, cus i remember that even just one of rear parts was WAY heavier than the rear seat cushion... so to me 14kg for both rear parts vs 7kg seat cushion just doesnt make sense unless each rear part is 14kg.

also 30kg for each front seat or both together?
You may be right. Looks like FROOP has a 135i, not a 1M. Perhaps the rear seat back does not fold down and is lighter.

Since I've removed the rear seat from my car, I'll dig up the pieces and weight them (as I promised to do weeks ago...).

Neil
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      02-27-2014, 02:27 PM   #10
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Quote:
Originally Posted by MDORPHN View Post
You may be right. Looks like FROOP has a 135i, not a 1M. Perhaps the rear seat back does not fold down and is lighter.

Since I've removed the rear seat from my car, I'll dig up the pieces and weight them (as I promised to do weeks ago...).

Neil
hehe.. i also have them lying around somewhere but never really got to weigh them but you DID say you'd weigh them so ill be patiently waiting

does anyone know how much the oem front seats weigh? (am curious how much weight i lost by my little interior build)
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      02-27-2014, 02:37 PM   #11
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On my 135i, the rear seat bottom (easily removed) weighs 17.2 lbs. Nice easy weight reduction for track days.
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      02-27-2014, 05:30 PM   #12
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It's the entire seat. Frame, cushion, hinge etc and in the case of the m-sport seats, airbags, seatbelt pretensioner and rails too.
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      02-27-2014, 05:32 PM   #13
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Those weights are all for a 1M. I purchased an entire 1M interior and sold my 135i interior. Doesn't make a difference though. They are exactly the same other than the stitching colour.
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      02-27-2014, 05:57 PM   #14
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Quote:
Originally Posted by froop View Post
Those weights are all for a 1M. I purchased an entire 1M interior and sold my 135i interior. Doesn't make a difference though. They are exactly the same other than the stitching colour.
Thanks for clarification.

Neil
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      02-27-2014, 06:55 PM   #15
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Quote:
Originally Posted by froop View Post
Those weights are all for a 1M. I purchased an entire 1M interior and sold my 135i interior. Doesn't make a difference though. They are exactly the same other than the stitching colour.
Manual or power seats?

Thanks.
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      02-27-2014, 07:03 PM   #16
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Quote:
Originally Posted by ozinaldo
Quote:
Originally Posted by froop View Post
Those weights are all for a 1M. I purchased an entire 1M interior and sold my 135i interior. Doesn't make a difference though. They are exactly the same other than the stitching colour.
Manual or power seats?

Thanks.
Power seats, no seat heating on mine though which might possibly make some difference.

I'm planning on getting some fixed back bucket seats soon so when the 1M seats in my car currently get pulled out I'll weigh them more accurately as well as weigh the seatbelt buckle and pretensioner separately.
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      02-27-2014, 07:08 PM   #17
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Sorry, I just read some of your earlier replies.

The back part of the rear seat (which is the folding section) was weighed as a whole, I.e both 60/40 split folds. But from the measurements I took, I'm quite sure it was 7.2kg for the bottom cushion and 14.5kg combined for both of the folding back cushions. This makes for a total of 21.7kg if you remove all of the rear seat cushions.

When I get around to removing the rear seat belt mechanisms I'll weigh those too.

And for the front seats, it's ~30kg each.
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      02-28-2014, 11:08 AM   #18
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Quote:
Originally Posted by froop View Post
Sorry, I just read some of your earlier replies.

The back part of the rear seat (which is the folding section) was weighed as a whole, I.e both 60/40 split folds. But from the measurements I took, I'm quite sure it was 7.2kg for the bottom cushion and 14.5kg combined for both of the folding back cushions. This makes for a total of 21.7kg if you remove all of the rear seat cushions.

When I get around to removing the rear seat belt mechanisms I'll weigh those too.

And for the front seats, it's ~30kg each.

damn, i was sure that they were heavier when i took em out.. but oh well, i still lost some crazy weight in mine..

rear seats (total) - 21.7kg
front seats (total) ~ 60kg

makes around 80kg add a cage, cover and two carbon buckets puts it down to around 50kg
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      02-28-2014, 11:09 AM   #19
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hahaha... all this work and only 50kg

as long as its all good fun why not
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      02-28-2014, 12:25 PM   #20
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I don't remember now where I've read it but power seats add around 10 kg. or maybe even more to the base manual seats. Anyone has a clear info on this?
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