Reason for wandering steering (soft bushings) - Infiniti Q50 Forum
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post #1 of 27 (permalink) Old 08-10-2019, 09:48 AM Thread Starter
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Default Reason for wandering steering (soft bushings)

I placed an endo camera pointed at the larger bushing of the front lower control arm to see how much movement there was backing out of the driveway. To my surprise there was considerable movement just putting it in reverse or drive with the brakes on. Given the geometrical location of the bushing, this much movement under such a lite load would definitely cause noticeable alignment changes when driving. FYI, this is a 2018 non DAS Q50.

https://youtu.be/V0Jp_9rFfRg
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post #2 of 27 (permalink) Old 08-12-2019, 08:29 AM Thread Starter
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The bushing in video:
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post #3 of 27 (permalink) Old 08-12-2019, 09:56 AM
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I have no "wandering" at all, in my 2018 AWD non DAS Q50. I have 23,000+ miles on her with lots of bumpy and hard cornering.

Judging from this I would believe you have a different issue. Where are you located? Which rims and tires? Spacers?

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post #4 of 27 (permalink) Old 08-12-2019, 10:05 AM
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I had a 2018 rental almost two years ago. Very basic model. I can't remember the last time that I drove a car that was that twitchy on-center. Required a high level of constant attention. Very tiring. I'll guess something was not right.

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post #5 of 27 (permalink) Old 08-12-2019, 10:37 AM
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Originally Posted by rpiotro View Post
I had a 2018 rental almost two years ago. Very basic model. I can't remember the last time that I drove a car that was that twitchy on-center. Required a high level of constant attention. Very tiring. I'll guess something was not right.
DAS? Tires. But yes, sorting something out like this can be problematic. What's causing his bushing to flex that much? That might be the underlying problem.
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post #6 of 27 (permalink) Old 08-13-2019, 08:51 AM
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DAS? Tires. But yes, sorting something out like this can be problematic. What's causing his bushing to flex that much? That might be the underlying problem.
Definitely not DAS. I have DAS and the car simply goes where it is pointed. Even self corrects somewhat for road crown, tramlining and crosswinds. I'm guessing tires or mis-alignment.
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post #7 of 27 (permalink) Old 08-13-2019, 12:04 PM
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Oh just noticed non DAS car. Mine is not DAS and is rock solid. Something is causing his bushing to deflect do much and must be the underlying problem. Tires or rim is my best guess. Not a lot of info in his post. Did it always do it? Did he hit a pothole? Miles on the car etc.
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post #8 of 27 (permalink) Old 08-13-2019, 02:40 PM
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Nissan is pretty famous for using cheaper bushing's in their FM platform cars, the transfer case bushings on the 370z and G37 come to mind as being a big problem
for them in the last generation.

I'd check for play in wheel when it's tires are off the ground and see if you can move the end-links or have any play in the suspension,
if you do bring it in and have the dealership replace the bushings.

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post #9 of 27 (permalink) Old 08-14-2019, 04:52 AM
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Ours wanders. Has from day one. In the test drive I just assumed I needed to get used to the drive by wire steering. I'm used to it now, it wanders. There's nothing wrong with the car. Tires? Maybe. I doubt it, and at the rate we're putting miles on it, I doubt I'll find out because we'll have a new one before it needs tires. Wife doesn't notice. To each his own.

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post #10 of 27 (permalink) Old 08-14-2019, 09:05 AM
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The video appears to show more forward/backward play of the bushing and less lateral movement but I do trust that OP felt the car was wandering because I also felt that quite a few times before. I thought it was due to the stock tires since when I switched to PS4S there wasn't any hint of unusual movement anymore. Then 2 years later, PS4S were done, had to switch to a different set of tires and I'm feeling the rear end kind of wanders again. It isn't bad by any stretch though and I rarely make corrections but I know it's there.
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