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

Swapping Pre for post facelift bumper + foglight mod writeup

2003 - 2009, roadster, coupe, facelift
Post Reply
User avatar
Greeno
Member
Member
Posts: 678
Joined: Wed May 13, 2009 9:15 pm
Location: St ives, Cambs.

Swapping Pre for post facelift bumper + foglight mod writeup

Post by Greeno » Thu Aug 11, 2011 7:35 pm

So the story: my old, prefacelift bumper had a nasty scuff thanks to the previous owner on probably high curb. Then some oik put a scuff down the side of it. Oh and also one of the fog light lenses was cracked.

So getting a re-spray, repair and fog replacement was going to cost a few quid…

Then JDM decided to sell his facelift bumper which I snapped up. The game was on….

The bumper arrived and was in pretty good condition, not far from perfect and a colour match so no respray needed.

Next the fogs. i ended up getting 5 second hand fogs. I got 1 where there was no corrosion and the light was mint but the black mounting frame was broken. I then got another 2. they had corrosion and the frames were broken. You can not buy the mounting frames from BMW – they are part of the light unit. Finally I got hold of a pair that had corrosion but the frames were good, all for a couple of quid.

As I couldn’t use the lights due to the corrosion I pondered what to do…..

So I decided to split open the lens and install an array of 5 LEDs in each.

Facelift fog lights fail due to corrosion. The corrosion causes the seal to separate from the body. So a lot of huffing and puffing later and I managed to totally split the lights. I would say that to cleanly split lights without corrosion would be impossible unless you do a cut and shunt. So the split and cleaned up lights:


Image

I then sprayed the metal portion black (this isn’t the final finish, I went for a matte final finish)

Image

Although the LED’s don’t look evenly spaced – they are, it is just down to the angle. It was a right pain in the arse getting the LED’s all pointing in the right direction, parallel and perpendicular to the flat plane as there are so many angles in the lights. I went through a load of araldite getting them right.

With the lens on:

Image

Final check before install;

Image

Installed off:
Image

installed on:
Image

I have std HID’s and the fogs look quite white in comparison so I think I need a change of bulbs.

Not that I ever really use the fogs, but I quite like the fact it is dark there rather than the shininess you get as standard from the silvering.

I need to sort out my head lamps now as the plastic is a bit milky. Also I sprayed the kidney grills black and they are showing signs of age now after 3 years or so. So they need redoing.

I used the bumper removal guide. Big thumbs up to that.

Now, a pre facelift bumper is NOT a direct replacement for a post facelift.

On pre facelift cars at the sides, behind where the reflectors are on the post facelift there is a little nubbin:

Image

The one just to the left of the crease in the wing. You have to chop this off. Like this:

Image

This is due to the extra thickness of the bumper at that point due to the reflector.

Also the bolts on the underside do not line up. But there is nothing you can do about that.

Greeno
"Rules are for the guidance of the wise and the obedience of fools"

ZED_NOT_ZEE
Member
Member
Posts: 298
Joined: Wed May 18, 2011 1:45 pm

Re: Swapping Pre for post facelift bumper + foglight mod wri

Post by ZED_NOT_ZEE » Thu Aug 11, 2011 9:29 pm

Is the undertray the same shape at least? Even if the bolts don't line up perhaps you can drill some new holes in your undertray to line up with the post-bumper?
Z4 3.0i SMG - Sport/Prem/Nav. Gray on Red (year-round beater)
e46 M3 SMG II - Cold/Heat/Lux. Black on Black (summer beater)
e36 M3 5-Speed - Cold/Lux. Black on Black (winter beater)
Suzuki GS500F - No options. Black/White (city beater)

User avatar
Danny_gartside
Newbie
Newbie
Posts: 27
Joined: Sat Sep 16, 2017 9:00 am
Location: Wakefield, West Yorkshire
Contact:

Swapping Pre for post facelift bumper + foglight mod writeup

Post by Danny_gartside » Sun Oct 22, 2017 9:11 am

nice write up Greeno.

I'm wondering how to best tackle a similar job. One of the brackets on my fogs has broken and I've now go a spare set so i'm going to do a swap round and hopefully select the best reflectors to make a good pair. I was wondering if it would work to cut a plastic panel that you could stick into the back of the reflector to make it level and then fix individual LEDs through that, hide the wiring behind the infill panel maybe. the new LEDs could sit tight behind the lens in theory and if sealed well there would be no danger of moisture getting in the front of the lens...I'm tempted to have a go at this as I've 2 sets of lights, 1 with a broken bracket, but 2 sets of lenses...
If I'm not Zedding i'll probably be KTMing
E85 2007 2.0i Msport

Corrie747
Newbie
Newbie
Posts: 10
Joined: Sat Mar 17, 2018 11:07 pm

Swapping Pre for post facelift bumper + foglight mod writeup

Post by Corrie747 » Fri Apr 27, 2018 3:13 pm

Great idea and now thinking of doing the same. For a non-electrical bod, how does the LED array wire up?

User avatar
Andrews.Rick
Newbie
Newbie
Posts: 33
Joined: Fri Jun 02, 2017 7:15 am
Location: Frampton Cotterell

Swapping Pre for post facelift bumper + foglight mod writeup

Post by Andrews.Rick » Sun Mar 03, 2019 11:00 pm

Hey Greeno,

Great write up thanks. I’m also suffering with one misty front fog light. Just like yourself I’d like to fix myself rather than pay for new replacement fog lights. I’ve already had them out - lens like new, black plastic surround fine, but chrome section is in an awful state. I’m stuck with my refurb because I simply cannot separate the clear lens from the chrome section. Tried running a new Stanley knife blade - didn’t work. Also tried heat, pulling and prising ‘gently’ with a plastic trim tool. I know water is getting in as I can see where the bonding substance is rubbish but I think too much of it is still ‘bonding’ to prevent me from getting the two sections separated.

Any help would be gratefully received!
Red E85 2.5i M-Sport, manual. Upgrades: cruise control retrofit & LED fogs. Next: Stormwerks nob & DAB/Bluetooth.

User avatar
Davz
Member
Member
Posts: 507
Joined: Mon Jul 10, 2017 8:35 pm
Location: Wellington, Shropshire

Swapping Pre for post facelift bumper + foglight mod writeup

Post by Davz » Mon Mar 04, 2019 1:03 am

I'm interested in doing this due to the constant condensation. Wouldn't it be easier to use LED waterproof strip lights as a drl or wouldn't they be bright enough?
2006 2.5 Monaco blue, orange footwell lights, Blue boot lights, 20/15mm wheel spacers, Buckley06 gear knob, Aux, MV2's, M pedals, Eibachs, Bilstein B4's, Whiteline front ARB. H&R rear ARB. Roof motor relocated, Alpine speakers, Xenons.

Post Reply