Following this one - mine looks like they have had better days too

 

We call them 'bumpstops' on here, but they're actually secondary elastomer springs and (rightly or wrongly) form part of the suspension.

For full height suspension you need full length bumpstops, fitting inactive shorter versions with standard ride height will obviously give you more rear bodyroll. Lowered 1ers seem to work better with shorter versions like the E60 5 Series ('Dinan Performance') versions (or M Performance versions).

If you're taking it all apart anyway, might as well fit B12 and new bumps at the same time?

 

So b12 would ideally want the shorter stops? I think it lowers the car around 7mm and the shorter stops are only around 10mm shorter if that.

If they are anything like on the E87

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Yup.

 

If yours is a Manual M135i F21, I'd expect it to be broadly similar to mine:

.Standard : Front 352mm and Rear 370mm
Eibach Pro: Front 343mm and Rear 353mm
Difference: Front - 9mm and Rear - 17mm

 

That's strange I though they lowered the same front and rear. I'm quite happy with that as I don't want to drop the front much but the rear sits too high for me.

So that's perfect. Wish it didn't lower the front as much as 9mm.

Think I'm gonna have to take the maxton splitter off. It's already near the ground as standard.

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Nope. The advertising blurb says front -25mm, rear -15mm (from standard ES height). We've repeatedly and comprehensively proved that's bobbins though, wrong way around.

 

Well l. That's that then. Seems ideal

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Happy with your steering now? Almost done with that spanner?

 

Looked at my rear suspension other day and noticed my rear bumps are in pretty bad shape.

They are still all there but cracked and holes in them and look in their way out

Do you think I would notice any difference at all by just getting new m performance shorter ones?

I don't want to make the back end feel sloppy and worried that although it may stop a bit of voice, when cornering there will be more roll.

We call them 'bumpstops' on here, but they're actually secondary elastomer springs and (rightly or wrongly) form part of the suspension.

Lowered 1ers seem to work better with shorter versions like the E60 5 Series ('Dinan Performance') versions or M Performance versions.

2 options, both OEM, MP refers to above

1. F series MPS 4 bumpstops; part no. 33502411196 "Auxiliary damper kit"
Part number for front bumpstop from M Performance Suspension kit (passive) for F2X: 31336859768
Part number for rear bumpstop from M Performance Suspension kit (passive) for F2X: 33536859769

2. Dinan Supplementary Ride Quality [aka bumpstops] are actually a combination of the following oem e series 3 & 5 series parts.
The bumpstops Dinan uses for their "Supplemental Ride Quality and Handling Kit." are as follows:-

Front part #: 31331138814

http://www.realoem.com/bmw/enus/partxref?q=31331138814

Rear part #: 33536762722

http://www.realoem.com/bmw/enus/part...&q=33536762722

#2 above is probably better and cheaper too

 

I've got the E60 versions to go on mine, currently sat in the shed. £13 on eBay for Sach versions.

 

Happy with your steering now? Almost done with that spanner?

Yes mate steering is more or less perfect. I'll get it sent back Monday.

Can't thank you enough for helping me out. Really did have to turn it around a few times.

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Ace, thank you.

 

blow the dust of an old thread here, had my bump stops changed last week on my F21 118D M-Sport, ever since the suspension feels extremely hard, the car used to go over speed bumps etc and soak them up almost like they weren't there, now it nearly puts my back out and the car just doesn't feel right.

I rang the garage and they say they are 100% the right ones and they measured them and they were exactly the same size.

Do new bump stops take time to bed in?

The part they fitted was 33536858240

Thanks

 

I would say they take a while to wear out, rather than break in.

Expect to need new ones every 75k (very aproximately, depending on local roads).

 

Looked at my rear suspension other day and noticed my rear bumps are in pretty bad shape.

They are still all there but cracked and holes in them and look in their way out

Do you think I would notice any difference at all by just getting new m performance shorter ones?

I don't want to make the back end feel sloppy and worried that although it may stop a bit of voice, when cornering there will be more roll.

We call them 'bumpstops' on here, but they're actually secondary elastomer springs and (rightly or wrongly) form part of the suspension.

Lowered 1ers seem to work better with shorter versions like the E60 5 Series ('Dinan Performance') versions or M Performance versions.

2 options, both OEM, MP refers to above

1. F series MPS 4 bumpstops; part no. 33502411196 "Auxiliary damper kit"
Part number for front bumpstop from M Performance Suspension kit (passive) for F2X: 31336859768
Part number for rear bumpstop from M Performance Suspension kit (passive) for F2X: 33536859769

2. Dinan Supplementary Ride Quality [aka bumpstops] are actually a combination of the following oem e series 3 & 5 series parts.
The bumpstops Dinan uses for their "Supplemental Ride Quality and Handling Kit." are as follows:-

Front part #: 31331138814
http://www.realoem.com/bmw/enus/partxref?q=31331138814

Rear part #: 33536762722
http://www.realoem.com/bmw/enus/part...&q=33536762722

#2 above is probably better and cheaper too

Hey all 👋

Just seen this resurrected thread,
Just thought it should be mentioned for people from the future reading this that when buying and installing the Bilstein B12 damper and spring kit No bumpstops are supplied.
You will need to buy Rear only (Mperformance/e60) as the Bilstein front dampers have an internal 'bumpstop' built in the damper itself.

 

Looked at my rear suspension other day and noticed my rear bumps are in pretty bad shape.

They are still all there but cracked and holes in them and look in their way out

Do you think I would notice any difference at all by just getting new m performance shorter ones?

I don't want to make the back end feel sloppy and worried that although it may stop a bit of voice, when cornering there will be more roll.

We call them 'bumpstops' on here, but they're actually secondary elastomer springs and (rightly or wrongly) form part of the suspension.

Lowered 1ers seem to work better with shorter versions like the E60 5 Series ('Dinan Performance') versions or M Performance versions.

2 options, both OEM, MP refers to above

1. F series MPS 4 bumpstops; part no. 33502411196 "Auxiliary damper kit"
Part number for front bumpstop from M Performance Suspension kit (passive) for F2X: 31336859768
Part number for rear bumpstop from M Performance Suspension kit (passive) for F2X: 33536859769

2. Dinan Supplementary Ride Quality [aka bumpstops] are actually a combination of the following oem e series 3 & 5 series parts.
The bumpstops Dinan uses for their "Supplemental Ride Quality and Handling Kit." are as follows:-

Front part #: 31331138814
http://www.realoem.com/bmw/enus/partxref?q=31331138814

Rear part #: 33536762722
http://www.realoem.com/bmw/enus/part...&q=33536762722

#2 above is probably better and cheaper too

Hey all 👋

Just seen this resurrected thread,
Just thought it should be mentioned for people from the future reading this that when buying and installing the Bilstein B12 damper and spring kit No bumpstops are supplied.
You will need to buy Rear only (Mperformance/e60) as the Bilstein front dampers have an internal 'bumpstop' built in the damper itself.

You dont need new bumpstops for the rear with b12 kit, the standard ones are fine.