Odd nagging issue, now a major problem...

ajrettke · 09-18-2018, 05:54 PM

So I have a 2014 335i Msport, only mod is a jb4 and some coding to get Bluetooth working.

The car is about 6 months out of warranty, and the first thing started happening about 4 months ago. Basically when the steering wheel was straight it would feel like would “stick” around dead center when moving very slowly...moving quickly was never noticeable. Basically it was never enough to bring it in.

Just this weekend however all of sudden when I brake hard the nose of the car dives down and to the left. It doesnt feel like it’s pulling to one side (seems to be braking evenly but just the nose is diving down). You can also feel the dive down and left or a shimmy when the engine starts. The last symptom I noticed when I was taking it into the dealer...around 70mph I hit a bump and the car started to wobble back and forth laterally almost as if I was losing control. This happened twice after hitting large bumps and I was able to replicate it at lower speeds (around 60mph) if I broke hard...

Never experienced anything like this before...any theories at all or experience from anyone else.

jh_f30 · 09-18-2018, 06:01 PM

How's the condition of your tires? Psi/treadwear.

Have you checked your wheel lug bolts to make sure they're all torqued properly? Sounds kinda terrifying.

rphz · 09-18-2018, 08:27 PM

Bad/broken spring and/or strut on the front left? Do you have adaptive suspension?

ajrettke · 09-21-2018, 12:42 PM

Broken right rear control arm!

Looks like it was towed by the control arm at some point because it was bent in the middle....finally just snapped I guess

F32Fleet · 09-21-2018, 04:35 PM

Quote:

Originally Posted by ajrettke

Broken right rear control arm!

Looks like it was towed by the control arm at some point because it was bent in the middle....finally just snapped I guess

Is this a CPO vehicle?

rphz · 09-21-2018, 06:46 PM

Quote:

Originally Posted by ajrettke

Broken right rear control arm!

Looks like it was towed by the control arm at some point because it was bent in the middle....finally just snapped I guess

Daaaang, thank you for the follow-up and picture

DrifterX · 09-21-2018, 07:29 PM

Scary stuff. Glad it didn't result into an accident, even though it's not as a severe failure.

cfm56d7b · 09-24-2018, 12:38 PM

Quote:

Originally Posted by ajrettke

Broken right rear control arm!

Looks like it was towed by the control arm at some point because it was bent in the middle....finally just snapped I guess

Was it towed while you were the owner? Or - while someone else owned the vehicle?

09-18-2018, 05:54 PM	#1
ajrettke Private First Class 20 Rep 175 Posts Drives: 2014 F30 335i Msport Join Date: Mar 2009 Location: Dumfries, VA iTrader: (1)	Odd nagging issue, now a major problem... So I have a 2014 335i Msport, only mod is a jb4 and some coding to get Bluetooth working. The car is about 6 months out of warranty, and the first thing started happening about 4 months ago. Basically when the steering wheel was straight it would feel like would “stick” around dead center when moving very slowly...moving quickly was never noticeable. Basically it was never enough to bring it in. Just this weekend however all of sudden when I brake hard the nose of the car dives down and to the left. It doesnt feel like it’s pulling to one side (seems to be braking evenly but just the nose is diving down). You can also feel the dive down and left or a shimmy when the engine starts. The last symptom I noticed when I was taking it into the dealer...around 70mph I hit a bump and the car started to wobble back and forth laterally almost as if I was losing control. This happened twice after hitting large bumps and I was able to replicate it at lower speeds (around 60mph) if I broke hard... Never experienced anything like this before...any theories at all or experience from anyone else.
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09-18-2018, 06:01 PM	#2
jh_f30 Lieutenant Colonel 1306 Rep 1,827 Posts Drives: 2013 335i Sportline Auto RWD Join Date: Aug 2017 Location: Bay Area, CA iTrader: (2)	How's the condition of your tires? Psi/treadwear. Have you checked your wheel lug bolts to make sure they're all torqued properly? Sounds kinda terrifying. __________________ 2013 F30 335i RWD ZF Melbourne Red ~Remus Sport Axleback~VRSF Chargepipe~VRSF Catless Downpipe~GPlus FMIC~HR Sport Springs~Active Autowerke OBD Flash Tune Stage 2~
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09-18-2018, 08:27 PM	#3
rphz Second Lieutenant 70 Rep 206 Posts Drives: 2014 F32 435xi Join Date: Nov 2016 Location: Colorado iTrader: (0)	Bad/broken spring and/or strut on the front left? Do you have adaptive suspension?
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09-21-2018, 12:42 PM	#4
ajrettke Private First Class 20 Rep 175 Posts Drives: 2014 F30 335i Msport Join Date: Mar 2009 Location: Dumfries, VA iTrader: (1)	Broken right rear control arm! Looks like it was towed by the control arm at some point because it was bent in the middle....finally just snapped I guess
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09-21-2018, 07:29 PM	#7
DrifterX Major 514 Rep 1,055 Posts Drives: 2016 340i M Sport 6MT+RWD Join Date: Sep 2014 Location: Toronto, Ontario iTrader: (1) Garage List 2017 Hyundai IONIQ ... [0.00] 2016 BMW 340i M Sport [0.00]	Scary stuff. Glad it didn't result into an accident, even though it's not as a severe failure. __________________ 2016 Estoril Blue II 340i M Sport \| ///MPPSK \| 6MT \| RWD \| Fully Loaded BM3 Stage 2+ 93 \| B58TU HPFP \| VRSF v2 Catted Downpipe \| 550i Clutch
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