02-19-2024, 03:29 PM | #1 |
BM3 Tuner
736
Rep 538
Posts |
X3M40 diff bolt issue
As some may already know my driveshaft went out on the way to bimmer invasion on Friday. Finally got home to take apart the car to install the new driveshaft. While working on the car I noticed there was a good bit of play on the rear diff. Noticed the bolt was lose so went to go tighten the bushing down and that’s when I realized my bolt had snapped causing there to be play which ended up causing the driveshaft to snap.
I know a ton of x3m cars have this issue has anyone had this on there m40?
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
02-19-2024, 06:19 PM | #2 |
BM3 Tuner
736
Rep 538
Posts |
Reached out to a company and they are going to create 4 different diff bushing, 3 level of polyurethane and a solid bushing. That will come with a hardened bolt. I will be testing these as soon as they get everything ready and might have a few that I can ship out for testing.
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
Appreciate
3
|
02-19-2024, 06:46 PM | #3 |
Your Average B58'er
452
Rep 336
Posts |
Welp, time for me to crawl under and inspect that bolt!
__________________
2019 X3 M40i - MHD STG2 HPFP E40ish | MHD FlexFuel Kit | TU HPFP | xHP stg 3 | VRSF catless downpipe | MST intake | BMS occ | Verus turbo heat shield | P3 V3 gauge w/ P3 ESVA | FTP Charge Pipe | RossRacing PCV v1 VTA | MSS Springs | RES Exhaust w/o valves | Vossen HF-5 21x9.5/10.5 265/295 PS4S | Yellow DRLs | Paragon Rotors w/P3 pads | GTS Tail Lights |
|
Appreciate
0
|
02-19-2024, 06:47 PM | #4 |
BM3 Tuner
736
Rep 538
Posts |
I’d lift the car aswell and see if there is any play in the diff push the axles up.
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
Appreciate
0
|
02-19-2024, 10:07 PM | #5 | |
Lieutenant Colonel
3721
Rep 1,939
Posts
Drives: 2022 X3 M40i
Join Date: Dec 2021
Location: NY
|
Quote:
For peeps don't know here is vid explaining what's happening with the bushing.. Last edited by Burr001; 02-19-2024 at 10:42 PM.. |
|
Appreciate
3
|
02-19-2024, 10:41 PM | #6 | |
Lieutenant Colonel
3721
Rep 1,939
Posts
Drives: 2022 X3 M40i
Join Date: Dec 2021
Location: NY
|
Quote:
|
|
Appreciate
0
|
02-19-2024, 11:56 PM | #8 |
Lieutenant Colonel
3721
Rep 1,939
Posts
Drives: 2022 X3 M40i
Join Date: Dec 2021
Location: NY
|
If you been launching the shit out of it or upped the boost...sooner or later. If your daily driving it, I don't think its needed. Warranty still intact so theres that to help you.
|
Appreciate
5
|
02-20-2024, 04:35 AM | #9 |
Enlisted Member
54
Rep 35
Posts |
Did you ever think that they made a weak point in designing so maybe the gear box doesn't explode, torque always seems to find the next weak link in the chain 🤔.
Also new to me 2019 m40i anything I should be looking out for like this issue? |
Appreciate
2
Chitown_vroom176.50 rosemont83124.50 |
02-20-2024, 07:40 AM | #10 | |
Major
1374
Rep 1,031
Posts |
Quote:
|
|
Appreciate
1
ContactPatch2458.50 |
02-20-2024, 07:46 AM | #11 | |
Private First Class
177
Rep 183
Posts
Drives: 2024 X3 m40i
Join Date: Dec 2023
Location: Chicagoland
|
Quote:
So if you put in an aftermarket part that “fixes” the play and potential bending, what are you trading off? I certainly don’t know enough to make that call. |
|
Appreciate
1
Alias1431806.50 |
02-20-2024, 07:49 AM | #12 |
Colonel
3392
Rep 2,983
Posts
Drives: 2020 M4 ZCP / 2023 X3 M40i
Join Date: May 2005
Location: Northern VA
|
I wonder if this should be preemptively replaced for stock cars. Does anyone know if the X3 M bolt and bushing replacement fix fits our cars?
|
Appreciate
0
|
02-20-2024, 08:51 AM | #13 |
BM3 Tuner
736
Rep 538
Posts |
If that’s the case they should have lawsuits the way the bolt is designed is very dangerous, on the x3m we’ve seen the entire diff twist upside down break both axles and driveshaft which then hit the fuel tank. The soft bushing is only there to make the ride quality better. Something like that should never fail no matter what happens.
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
Appreciate
0
|
02-20-2024, 08:57 AM | #14 | |
BM3 Tuner
736
Rep 538
Posts |
Quote:
For my car in the meantime I just went to Home Depot and bought a grade 8 bolt(highest strength bolt I can get until I get the new bushing. Mine you I’ve probably abused my car more in the last 2 months then most have on this forum page. Well over 200 launches. And no telling how the last owner treated the car. I can also post links to some upgraded bolt in the mean time if anyone is looking. Will also reach out to Vargas to see if there fix will work.
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
|
Appreciate
2
turbosig34.00 earlgsxbusa130.50 |
02-20-2024, 08:57 AM | #15 |
Lieutenant
573
Rep 411
Posts |
X3M uses same setup and can be replaced with this:
https://www.einhornindustries.com/st...icorn_egg.html |
Appreciate
0
|
02-20-2024, 09:02 AM | #16 | |
BM3 Tuner
736
Rep 538
Posts |
Quote:
Has anyone tested this in their car yet? And for those who don’t want a solid bushing we will have options out soon.
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
|
Appreciate
1
earlgsxbusa130.50 |
02-20-2024, 09:38 AM | #17 | ||
Lieutenant
595
Rep 559
Posts
Drives: 2022 X3MC
Join Date: Feb 2012
Location: Fairfax, VA
|
Quote:
https://rennfix.com/bolt-saver?fbcli...s6IPZw7fTQxwD8 https://vargasturbo.com/product/vtt-...-inserts-copy/ Quote:
https://x3.xbimmers.com/forums/showthread.php?t=2053091 https://x3.xbimmers.com/forums/showthread.php?t=2059199
__________________
'00 328i // Sold
'04 Z4 3.0i // Sold '22 X3MC LCI |
||
Appreciate
2
5LEEPR_G01572.50 ContactPatch2458.50 |
02-20-2024, 11:31 AM | #18 |
Major
2459
Rep 1,486
Posts |
Yeah that part is scary. Thinking about ordering one of the three parts the guy mentioned in (video #2) and replacing at my leisure. Plus that bushing removal contraption he showed in the video, looks to be an easy fix with that tool! Last edited by ContactPatch; 02-20-2024 at 11:37 AM.. |
Appreciate
1
TXGrey1374.00 |
02-20-2024, 12:27 PM | #19 | |
Enlisted Member
54
Rep 35
Posts |
Quote:
|
|
Appreciate
1
AshtonPJT735.50 |
02-20-2024, 03:09 PM | #20 |
Major
645
Rep 1,059
Posts
Drives: 2018 X3 M40i, 2012 X3 Xdrive35
Join Date: Aug 2012
Location: Moraga, California
|
A grade 8 bolt is a SAE standard. The threads are different than the metric equivalent 10.9 bolt which is what you want.
__________________
2016 Z06 Vette, 10.53@132
1984 Vette, 406, 10.23@131 2021 SQ5 |
Appreciate
0
|
02-20-2024, 03:24 PM | #21 | |
BM3 Tuner
736
Rep 538
Posts |
Quote:
A 1/2 inch x 5 or 6 inch bolt will work
__________________
2019 BMW X3M40I
Paul Johnson Tunes/ACX Solutions Shop/Development Car, XHP stage 3 with custom settings, CTS Downpipe, intake, Chargepipe, turbo inlet, coils, Nostrum Stage 1 Injectors and Nostrum Big Bore HPFP, Vargas PCV and Oil cap, HnR springs, ACX Rear poly bushing, ACX Intake scoop |
|
Appreciate
0
|
02-20-2024, 05:28 PM | #22 |
Major
645
Rep 1,059
Posts
Drives: 2018 X3 M40i, 2012 X3 Xdrive35
Join Date: Aug 2012
Location: Moraga, California
|
__________________
2016 Z06 Vette, 10.53@132
1984 Vette, 406, 10.23@131 2021 SQ5 |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|