How to: Rear Bumper Removal

[conaero]

Rear Bumper:
Est time: 2-3hrs
1. Jack up the rear of the car and remove the wheels
2. Undo the lower screw from the arch liners where it meets the lower edge of the rear bumper
3. Remove the boot weather seal, boot floor and side panels
2. Remove the battery
3. Remove the amp behind the battery (if you have one)
3. Remove the bumper under tray
4. Undo the 2 17mm bolts from the underside of the car
5. Undo the screws that go along the top centre edge of the bumper where it meets the boot opening
6. Undo the 3 screws on each side from inside the boot where the bumper fixes to the rear wings
7. Mask up the rear wings where the bumper meets them on the side with thick bodyshop tape (you will thank me later)
8. Remove the bumper rewards from the car taking note to remove any electrical connections to reverse sensors if applicable.

Pics to follow...

 

[miket]

 

[CatmanV2]

Matt you should make these stickies, I think!

C

 

[Maserharti]

On a 2000MY 3200 the 2x 17mm bolts had been replaced with 2x13mm bolts on each side also used to support the rear hanger on the exhaust box. A ratchet spanner made the most forward bolt of the 3 sets on each side easier to get to.

 

[davy83]

Good write up sir, well done and interesting, i am pretty sure i don't have an undertray, would love to see pictures!

3. Remove the bumper under tray

 

[safrane]

GS and Face Lift bumpers have an undertray that starts just behind the trans axle. The 3200 and early 4200 hqve a veturie style opening with no grills.

 

[davy83]

interesting, i wonder what made them change the design? the large air vent in the rear bumper on my 3200 does get pretty messed up with grit and stuff off the road, so i guess a grill and tray wold stop that? the original vent looks like its designed to provide downforce, but i am not sure it does really, and if they removed it, then looks like Maserati don't think it works either

GS and Face Lift bumpers have an undertray that starts just behind the trans axle. The 3200 and early 4200 hqve a veturie style opening with no grills.

 

[BL330]

Hi Davy83, the larger rear under tray vent of the 4200 & GS do provide high speed downforce too.
When you follow one in the rain you can clearly see 2 vortex's from the exhaust separated by the centre area where the vent is in operation. It is a sight to behold.

 

[TimR]

Its no good - Im going to have to ask 'cos I cant see them...!

Where are the two 17mm bolts located, referred to in step 4 ?

cheers

 

[Gp79]

Its no good - Im going to have to ask 'cos I cant see them...!

Where are the two 17mm bolts located, referred to in step 4 ?

cheers

Look directly from underneath, above the exhaust silencers, it is where the main bumper brackets are bolted to the shell of the car.

Just loosen them enough to allow the bumper to slide backwards.

 

[TimR]

Look directly from underneath, above the exhaust silencers, it is where the main bumper brackets are bolted to the shell of the car.

Just loosen them enough to allow the bumper to slide backwards.

So they are- staring me in the face...!

cheers....

 

[FIFTY]

Let me know if you have any tips on this @TimR I am psyching myself up to get this done in the next month or two.

 

[philw696]

When I did mine in 2015 in New Zealand getting it ready for compliance.

 

[nigw]

I did mine at the weekend! All straightforward except for rusted torx screws on the undertray which slowed things up significantly! Fresh in my mind if you get stuck on anything...

 

[BennyD]

Alternatively, if you are short of time;

1. Hook a ratchet strap at the rear of each wheel arch
2. Hook the two loose ends together round a tree
3. Start up
4. Traction control off
5. Gas it

It might take a bit longer to refit it but job time for removal; 2mins 15secs.

 

[MarkMas]

Rear Bumper:
Est time: 2-3hrs
1. Jack up the rear of the car and remove the wheels
......

9. Insert £9.99 Skoda rear parking sensor.
10-17. Carry out steps 1-8 in reverse.

Total cost of rear parking sensor replacement: £509.99

 

[FredrikG]

Asking for some help her to understand if the shop has done a stupid thing, or my GranSport yet again needs some servicing.

When removing the rear bumper, do you disconnect cables for the truck lock actuator and the trunk light? Or is there any risk that they get squeezed or damaged?

I just got my GS back from the shop after someone had scratched the rear bumper. They removed and repainted the bumper. Problem is, when I got home I realized that the truck lock with the key fob or dash compartment button doesn't work, and when opening the trunk manually with the key, I also note that the next light doesn't come on. The shop of course claims that it was like that when they got it.

Anyone knows if this might be a simple case of a not-reconnected-cable or similar?

Thanks!

 

[safrane]

Doubt it is linked as the cables for the two areas (trunk/bumper) run separately.

 

[FIFTY]

The wiring loom doesn't go through the bumper

Could be a few things, I would start here:

https://www.sportsmaserati.com/index.php?threads/4200-failed-tailgate-trunk-anciliaries-including-interior-light-split-wiring-loom.33095/

Does your boot/trunk light work? If not it's usually a sign that the loom is breaking up

 

[conaero]

No the wiring is all in the bootlid the only wiring to does is the parking sensors.