delmarco Posted March 15, 2010 Report Share Posted March 15, 2010 Yes, you are reading correct. This is not some hocus pocus DIY but technical instructions for realigning, calibrating and fixing a sagged or off frame lower front bumper back to factory new condition Last summer I went to a local shop and got quoted $750 to realign the bumper with dent removal on the nose section of my hood and light paint touch up on the plastic bumper. And that is a local BMW specialty shop that was recommended to me, so I cannot imagine what the dealership would charge for this basic 10 minutes or less DIY job. Anyway I got the advice from BodyMan and a few other folks here but like most issues there is no DIY for this awesome secret fix and I'm sure 97% of you will be finding out about this for the first time here. The only tools needed are a small screwdriver and dull clean butter knife for removing the corner lamps and a 10mm ratchet wrench or driver on preferably a slim low profile ratchet handle. So as you can see in these pictures my bumper was sort of sagging and I noticed it becoming more pronounced since the cold, snowy, salty days of winter has passed. And here in the picture below is what I want for my car! It is what we all want for our cars! Notice the almost seamless bumper attachment on this 2003 330xi: So begin by popping out your corner bulb housing. This picture should explain what to do after you open your hood and find the small access hole above the light housing. Stick your small screw driver in there and push down on this tab (as shown in picture below) whiles using the butter knife to pry out the housing. After that removing the housing body from the bulb socket holder (which screws off the housing) to acess what is behind. This is what you will see: Behind the housing is the bumper bracket which is the white plastic bolted on object. Use your ratchet and 10mm driver to loosen the bolts-DO NOT REMOVE THEM! Once the bolts are loose the white bracket will also be loose. Chances are your bracket was sagging off the bolts which was causing the bumper to also sag. Realign the bracket at the highest point and make sure the bumper is also pushed back up and aligned neatly. When done start by tightening the upper bolt then the lower bolt last. If your bracket is cracked or broken you will have to replace it so expect to find cracked or broken off brackets on cars that have severe sagging or had a front end collision before. On my car I expected the worse and thought that the brackets would be broken or split, but to the contrary they were in perfect condition. The bolts on my car for some reason were already loose (or not tight at all) but the brackets were firm and sitting at their highest point possible and were not in themselves sagging or lower than they should've should been. Still I loosened them even more and tried to lift the bracket and move the bumper up but it didn't work and I realized my bumper was not sagging at all. It seems the plastic lower bumper is actually warped as if it was punched in at the lower side flank and the upper lip curled out where the space/sag is apparant. So I most likely need a new bumper or some sort of fancy dent removal for plastic panels. The reason I'm stating this is because you could also be in the same boat as me. But this 10 minute DIY is an easy way of making sure the brackets are NOT the cause of your sag. On facelift cars and certain coupes they may be a secondary bracket or slider in which your bumper slides onto. See in the borrowed picture below. This may be broken and will need replacing if it is. Chances are if the white bracket is broken then this one is too See this link here for more information on fixing and replacing the secondary bracket/slider. http://www.e46fanatics.com/features/feature.php?news_id=44 Parts Numbers for the brackets are different from year to year and the type of E46 you have (coupe, M3, sedan, facelift and non-facelift) so just head over to www.realoem.com and get the part number for your car. Good Luck. PS: Hopefully others can add information to this DIY regarding other types of bumpers and e46 vehicles. Thanks. Link to comment Share on other sites More sharing options...
simonlpearce Posted March 15, 2010 Report Share Posted March 15, 2010 Good work, although on a facelift model you will have to remove the entire light assembly, or take the bumper off (probably easier) to adjust! Link to comment Share on other sites More sharing options...
mistrmo Posted March 16, 2010 Report Share Posted March 16, 2010 Yeah that borrowed pic seems to be a facelift and the bracket looks too low down to be accessed through the indicator housing Link to comment Share on other sites More sharing options...
genuity Posted March 26, 2010 Report Share Posted March 26, 2010 Thanks delmarco. Any tips on a sagging rear bumper? I see mine doing this on the lip of the passenger side. The rest of the bumper gaps is fine. It's always these edges that seem to sag like a hag. Link to comment Share on other sites More sharing options...
juan1 Posted March 28, 2010 Report Share Posted March 28, 2010 i tryed this and i would go anywhere my bumper Link to comment Share on other sites More sharing options...
Daz 330 Cs Posted December 29, 2010 Report Share Posted December 29, 2010 i tryed tried this and i would go anywhere my bumper Say what Bubba ?? Link to comment Share on other sites More sharing options...
Stan 24v Posted January 7, 2011 Report Share Posted January 7, 2011 Thanks delmarco. Any tips on a sagging rear bumper? I see mine doing this on the lip of the passenger side. The rest of the bumper gaps is fine. It's always these edges that seem to sag like a hag. Stick your head inside your rear arch and you will see a very small bracket just above where the bumper meets the car. This is held on with a 10mm (I think) nut which can be loosened. Slot your bumper into the bracket and hold in place while you tighten up the nut. Link to comment Share on other sites More sharing options...
DJ Syxx Posted January 8, 2011 Report Share Posted January 8, 2011 good write up! Link to comment Share on other sites More sharing options...
kib Posted February 1, 2011 Report Share Posted February 1, 2011 done this on my front bumper today facelift took wheel off lifted plastic wing cover and found bolts a bit loose .you can reach in and tighten bolts with ring spanner. keith Link to comment Share on other sites More sharing options...
blackridere46 Posted February 4, 2011 Report Share Posted February 4, 2011 Say what Bubba ?? Link to comment Share on other sites More sharing options...