Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

M-Sport lower rear bumper repair

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Post Reply
Online
Pondrew
Lifer
Lifer
Posts: 8469
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

M-Sport lower rear bumper repair

Post by Pondrew » Mon Jan 30, 2023 6:40 pm

My E89 has had a crease in the centre of the rear lower bumper/ valance since we got it two years ago. It looks like somebody reversed into a towbar or the corner of a post. On and off for those two years I have been considering how to sort it out. Used items from eBay are usually knackered and expensive and a replacement from BMW is very expensive.

So yesterday I took the valance off and set about trying to sort it. I didn't have much hope of improving it, as the crease was pretty sharp (you can see what is was like in the following pictures).
I heated up the creased area with a hairdryer and while still pretty warm, I tapped the top down with a hammer, the end covered in electrical tape to help with added dents. From the inside, again while quite warm, I used a thin piece of steel on the crease and hit that with a hammer. I had to do this a few times, heating it back up each time. I managed to push the dents below flush; so then filled the area with U-Pol plastic filler.

Once dried I sanded it all back flush with 320, 600 and finally 1500 grit wet and dry. I then sanded the whole piece with 600 grit to flatten the paint.
I bought a can of 'Sophisto Grey' metallic (A90 code) from Halfords and sprayed it with a couple of coats. Then finished it with a few coats of clear lacquer.
I was not expecting much TBH and was preparing to buy a replacement bumper if it didn't work well.
I am well chuffed with how it has come out; not 100% perfect but probably 95% and you can't notice any imperfections unless you runa finger across it. Cost me £10.99 for the paint; I had the plastic filler and lacquer already from a previous repair to the front valance.

Before:
IMG_8102.JPG
IMG_8102.JPG (100.75 KiB) Viewed 316 times
IMG_8103.JPG
IMG_8103.JPG (84 KiB) Viewed 316 times
IMG_8104.JPG
IMG_8104.JPG (74.19 KiB) Viewed 316 times
After:
IMG_8753.JPG
IMG_8753.JPG (83.13 KiB) Viewed 316 times
IMG_8756.JPG
IMG_8756.JPG (77.28 KiB) Viewed 316 times
IMG_8769.JPG
IMG_8769.JPG (96.04 KiB) Viewed 316 times
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

Neil CR
Member
Member
Posts: 94
Joined: Sat Feb 26, 2022 7:12 pm
Location: Surrey/ hants border

M-Sport lower rear bumper repair

Post by Neil CR » Mon Jan 30, 2023 9:50 pm

👏👏👏

User avatar
smorris_12
Member
Member
Posts: 902
Joined: Mon Apr 18, 2022 2:14 pm
Location: Somerset

M-Sport lower rear bumper repair

Post by smorris_12 » Mon Jan 30, 2023 10:07 pm

Excellent job. It's the sort of repair I always have to explain to a friend of mine as being more than good enough unless you actually lie on the ground and stare directly at it!
------
Scott

Where are we going and why am I in this handbasket?

2006 Z4 2.5si Silbergrau und rot

User avatar
inkey$
Lifer
Lifer
Posts: 10479
Joined: Sun Mar 21, 2010 9:48 pm
Location: Sevenoaks & Suffolk
Contact:

M-Sport lower rear bumper repair

Post by inkey$ » Mon Jan 30, 2023 10:23 pm

Great result! Satisfying too when its been bugging you for a while :thumbsup:
Current: Project Audi A2 1.4SE
Previously: Z3R 2.8 • E46 330i • Z4R 3.0 • Z4///MC • E90 335i • Z4///MR • Z3///MC 'Breadvan' • Z3R 2.8 • E30 325i R • Z4C • Z4R 3.0

User avatar
mkinternet
Member
Member
Posts: 169
Joined: Mon Jun 11, 2018 8:38 am
Location: Bedfordshire

M-Sport lower rear bumper repair

Post by mkinternet » Tue Jan 31, 2023 12:25 pm

Fab job - well done 👍 👍👍
E89 - 3.0i Auto 2010
Bilstein B12 Pro Kit
Wiechers Front Strut Brace
19” MAK LUFT Wheels
H&R Anti Roll Bars (Front and Rear)
Royals Steering Wheel
35i Brake Upgrade
Stage 1 Remap

User avatar
Smartbear
Lifer
Lifer
Posts: 13685
Joined: Wed Feb 05, 2014 6:54 pm
Location: a barn in Somerset

M-Sport lower rear bumper repair

Post by Smartbear » Tue Jan 31, 2023 2:29 pm

Looks much better, I’m assuming the previous owner was deaf & couldn’t hear the parking sensors :P
Rob
Image

e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

BeardyJon
Member
Member
Posts: 508
Joined: Tue Mar 25, 2014 5:24 pm
Location: Edinburgh

M-Sport lower rear bumper repair

Post by BeardyJon » Tue Jan 31, 2023 2:44 pm

I have one of these to sell if you decide you want to replace it, just PM me.
2012 E89 sDrive20i M Sport Celtic Tuning Stage 3 Remap
2008 E86 Z4 M Sport 2.0i - Gone
2003 E46 316ti M Sport - Gone

User avatar
B21
Lifer
Lifer
Posts: 5408
Joined: Tue Oct 05, 2021 7:15 pm
Location: In my Banana Yellow Space Shuttle...somewhere over Southern Caledonia

M-Sport lower rear bumper repair

Post by B21 » Tue Jan 31, 2023 2:52 pm

Smartbear wrote: Tue Jan 31, 2023 2:29 pm Looks much better, I’m assuming the previous owner was deaf & couldn’t hear the parking sensors :P
Rob
He was an Arnold Clark driver..say no more… :tumbleweed: :thumbsdown: :rofl:

Here in Scotland it’s the sign of someone who goes through 20 mph limits either at 15 mph or 45 mph..in de-restricted areas does 45 mph,turns without mirrors or signals and either frequents McDonalds or one of the many garden centres sprinkled across the country…
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard…
A very modified Atacama Yellow 35is :thumbsup:

Online
Pondrew
Lifer
Lifer
Posts: 8469
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

M-Sport lower rear bumper repair

Post by Pondrew » Tue Jan 31, 2023 4:44 pm

B21 wrote: Tue Jan 31, 2023 2:52 pm He was an Arnold Clark driver..say no more…
A C was where I bought it from! :oops: I have another set of plates but they have Shytner on them, so rock and a hard place! :)
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

Online
Pondrew
Lifer
Lifer
Posts: 8469
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

M-Sport lower rear bumper repair

Post by Pondrew » Tue Jan 31, 2023 4:46 pm

Smartbear wrote: Tue Jan 31, 2023 2:29 pm I’m assuming the previous owner was deaf & couldn’t hear the parking sensors
That has crossed my mind. The crease is bang in the middle, so I'm thinking a long tow bar or similar. :?
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

User avatar
MikeyH
Lifer
Lifer
Posts: 4842
Joined: Sat Oct 02, 2021 10:57 pm
Location: Devon

M-Sport lower rear bumper repair

Post by MikeyH » Tue Jan 31, 2023 5:49 pm

You've made a good job of that pondrew :thumbsup:
Now, Sterling grey Z4 2.2 with cup holders, stubby aerial and sport seats. Roadsters ‘cause they’re great with the roof down.
Ford Anglia, Red Sprite, a few MG midgets, MGB Roadster and yellow Ford Capri, all gone many years now.

User avatar
tiglon
Senior Member
Senior Member
Posts: 1065
Joined: Mon Jun 24, 2019 11:20 am
Location: Essex

M-Sport lower rear bumper repair

Post by tiglon » Tue Jan 31, 2023 7:03 pm

Looks like a good job but.... all I'm hearing is that you reversed into a tow bar and don't want to take responsibility :poke:
2014 E89 35is Valencia Orange 788M wheels (M2 Competition), E90 M3 control arms, Eibach Pro Kit Springs, MHD Stage 1

User avatar
pvr
Legend
Legend
Posts: 26237
Joined: Fri Jun 15, 2007 12:27 pm
Location: South East UK

M-Sport lower rear bumper repair

Post by pvr » Tue Jan 31, 2023 7:28 pm

So it went from grey metallic to black now? :lol:

Finish looks good though, quite impressive for someone who cannot bend down :evil:
Current:
911-50 Black - unique spec
X5M - 575 hp of fun in a V8
Abarth 595 Comp.
Golf Clipper - collectors item
Z4 3.0si Black Sapphire
VW ID.3

Previous:
Z4M Silver Grey - non flimper spec (gone to Bing)
Z4 3.0 Toledo

Online
Pondrew
Lifer
Lifer
Posts: 8469
Joined: Wed Jan 20, 2021 7:20 pm
Location: Spaldingski

M-Sport lower rear bumper repair

Post by Pondrew » Tue Jan 31, 2023 7:55 pm

pvr wrote: Tue Jan 31, 2023 7:28 pm So it went from grey metallic to black now?
Same colour as before. Light was fading so camera decided to do that. A photographer I definitely am NOT! :(
All good things come to those who wait. I'm really impatient which explains a lot.

F31 320i. Good car.
E89 20i Now fully dried
Z3 'free litre'. Project and a half. Complicated!
Mazda3 sold
Tatty old R56 Mini Cooper. Money pit!

Post Reply