Can M440i Rear Diffuser be Removed Without Removing Bumper?

1QuikWS6 · 03-24-2023, 03:36 PM

Has anyone successfully removed/replaced the rear diffuser on a M440i WITHOUT removing the entire rear bumper?

Maybe just by removing the rear under panels to access the bottom diffuser clips?

Service manual shows entire bumper removal, but looking at the clips I can't belive that is necessary. Looks as if you unclip entire bottom and sides of diffuser it would swivel up and then pull out of top mounting slots

I have a new CF Diffuser to install and not looking forward to all the fiddly bits required (trunk trim, tailights, etc) to remove entire bumper

Shadowfantasy · 05-01-2023, 11:43 PM

Quote:

Originally Posted by 1QuikWS6

Has anyone successfully removed/replaced the rear diffuser on a M440i WITHOUT removing the entire rear bumper?

Maybe just by removing the rear under panels to access the bottom diffuser clips?

Service manual shows entire bumper removal, but looking at the clips I can't belive that is necessary. Looks as if you unclip entire bottom and sides of diffuser it would swivel up and then pull out of top mounting slots

I have a new CF Diffuser to install and not looking forward to all the fiddly bits required (trunk trim, tailights, etc) to remove entire bumper

Same question here i have a diffuser and don’t know how to install it did you figure it out?

1QuikWS6 · 05-02-2023, 07:55 AM

After checking with RW they recommended removing the bumper for install - took the car to my local shop & had them install both the rear CF Diffuser, CF Front Air Curtains & Front CF Spoiler since it required removing both front & rear bumpers & they are way more experienced than I am

They stated install was EZ, the new parts fit perfectly & they had no issues. Took them around 3hrs total for all & cost to me was $220

Asleep-Albatross · 05-14-2023, 09:48 AM

Quote:

Originally Posted by 1QuikWS6

After checking with RW they recommended removing the bumper for install - took the car to my local shop & had them install both the rear CF Diffuser, CF Front Air Curtains & Front CF Spoiler since it required removing both front & rear bumpers & they are way more experienced than I am

They stated install was EZ, the new parts fit perfectly & they had no issues. Took them around 4hrs & cost to me was $220

Do you have a recommendation/links on which parts you went with, are these the OEM CF kits? A few weeks away from receiving my '24 M440i, and these are top of the work list for me. Thanks!

Davg31 · 05-15-2023, 12:18 PM

lol 10mn for that its realy easy

03-24-2023, 03:36 PM	#1
1QuikWS6 No 55mph 1622 Rep 8,476 Posts Drives: F32 435ix MSport Join Date: Jul 2009 Location: Blitzburgh, PA iTrader: (113) Garage List 2022 BMW M440ix Vert [0.00] 2015 BMW 435ix MSport [0.00] 2000 Pontiac Trans Am [0.00]	Can M440i Rear Diffuser be Removed Without Removing Bumper? Has anyone successfully removed/replaced the rear diffuser on a M440i WITHOUT removing the entire rear bumper? Maybe just by removing the rear under panels to access the bottom diffuser clips? Service manual shows entire bumper removal, but looking at the clips I can't belive that is necessary. Looks as if you unclip entire bottom and sides of diffuser it would swivel up and then pull out of top mounting slots I have a new CF Diffuser to install and not looking forward to all the fiddly bits required (trunk trim, tailights, etc) to remove entire bumper __________________ F32 435ix//MGM//M Sport-Prem-Tech-Driver Assist-Lighting-Cold Weather-Dyn Handling Pkgs//M4 Black Lthr Int w/M4 Alum Blade Trim//HK w/Bavsound Stg3//763M//M4 Euro LCI Tails//M4 Mirrors w/CF Covers//AWCarbon CF F/R Spoilers-Side Splitters-Diffuser 6WB/ID6 HU+HUD/IND M4 Alcantara Armrest//PURE S2 Turbo//AA FMIC+DP//ER CP+TIC//3.5bar TMAP/TS DV//AWE Tuning Exh w/Blk Tips//Turner MS CF Intake//BM3 Cary Jordan Tune//MPerf Diff//PrecRW Ignition Kit
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05-02-2023, 07:55 AM	#3
1QuikWS6 No 55mph 1622 Rep 8,476 Posts Drives: F32 435ix MSport Join Date: Jul 2009 Location: Blitzburgh, PA iTrader: (113) Garage List 2022 BMW M440ix Vert [0.00] 2015 BMW 435ix MSport [0.00] 2000 Pontiac Trans Am [0.00]	After checking with RW they recommended removing the bumper for install - took the car to my local shop & had them install both the rear CF Diffuser, CF Front Air Curtains & Front CF Spoiler since it required removing both front & rear bumpers & they are way more experienced than I am They stated install was EZ, the new parts fit perfectly & they had no issues. Took them around 3hrs total for all & cost to me was $220 __________________ F32 435ix//MGM//M Sport-Prem-Tech-Driver Assist-Lighting-Cold Weather-Dyn Handling Pkgs//M4 Black Lthr Int w/M4 Alum Blade Trim//HK w/Bavsound Stg3//763M//M4 Euro LCI Tails//M4 Mirrors w/CF Covers//AWCarbon CF F/R Spoilers-Side Splitters-Diffuser 6WB/ID6 HU+HUD/IND M4 Alcantara Armrest//PURE S2 Turbo//AA FMIC+DP//ER CP+TIC//3.5bar TMAP/TS DV//AWE Tuning Exh w/Blk Tips//Turner MS CF Intake//BM3 Cary Jordan Tune//MPerf Diff//PrecRW Ignition Kit Last edited by 1QuikWS6; 05-15-2023 at 12:29 PM..
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05-15-2023, 12:18 PM	#5
Davg31 First Lieutenant 110 Rep 314 Posts Drives: G23 Join Date: May 2018 Location: Europe iTrader: (0)	lol 10mn for that its realy easy
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