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      07-29-2019, 11:28 PM   #1
avenger07
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Angry 2012 135i Front end hopping constant body movement

I just did the koni yellow and swift r spring replacement on my 135 as suggested by many people on here. I can say that the ride is much better than the factory suspension. More grip in corners and the car feels more planted a high speeds.

I thought however it was going to solve an ongoing issue that I have where the front end of the car bounces over every single imperfection on the road. I was sure that I had a weak spring but that's not the case that they have all been replaced. I have done visual inspection of the frond end and nothing which looks out of place. Alignment was done by the dealership today and tires are only 6 months old. As I have not driven another 135i for comparison I am not sure if this is the way the car is or if there is a problem. Seems like there is constant movement in the body in the front. The Koni shocks have been left at their factory settings for dampening.

Am I going crazy or do I have an issue here that I need to look at?
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      07-30-2019, 02:43 AM   #2
John_01
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I had a similar problem after fitting koni yellow. The guy doing the install had (unintentionally) turned the adjustment knob to maximum-hard setting during the installation. It made the front end feel harsh to the point of feeling like it was bouncing. After I backed off the damping, it car rode nicely. Around 1.5 turns from full soft is a fairly typical setting for the front.
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      07-30-2019, 03:39 AM   #3
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How are your sway bar end links looking? Maybe one is broken ?

I would start with adjusting the shocks first. Is the suspension making any noises when this "movement" occurs ? Perhaps one of your wheels is bent ?

Dack
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      07-30-2019, 05:31 AM   #4
MightyMouseTech
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Play around with shock settings and see if it makes a difference. Getting the 1M strut tower braces will make this a LOT easier.
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      08-02-2019, 01:11 PM   #5
avenger07
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Quote:
Originally Posted by Dackelone View Post
How are your sway bar end links looking? Maybe one is broken ?

I would start with adjusting the shocks first. Is the suspension making any noises when this "movement" occurs ? Perhaps one of your wheels is bent ?

Dack
Sway bar links look fine to me however I'll have another poke at them.

I'm going to check the adjustment on the shocks this weekend.
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Dackelone8977.50

      08-02-2019, 01:13 PM   #6
avenger07
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Quote:
Originally Posted by MightyMouseTech View Post
Play around with shock settings and see if it makes a difference. Getting the 1M strut tower braces will make this a LOT easier.
Yeah I've been thinking about changing out the brace for that reason.

The car has has new tires recently and it doesn't shake at highway speeds so wheels should be good. 🤞
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      08-04-2019, 06:07 PM   #7
avenger07
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Adjusted the fronts 1.5 turns and the problem is still there. Feels like it's coming from the drivers side mostly. I'll take a look at the sway bar links next weekend.
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      08-26-2019, 10:14 AM   #8
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You figure it out?
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      09-06-2019, 03:05 AM   #9
avenger07
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Quote:
Originally Posted by houtan View Post
You figure it out?
Have not had a chance to look at it but i suspect I need to replace ball joints, a control arm or the tie rod on the drivers side. I went for a trip recently and the car was vibrating under breaking at highway speeds. I doubt it's a rotor given how thick these ones are. I should have time next week to investigate. Maybe it's time for the infamous m3 parts swap. Lol.
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