My 06 M35x is wobbly!

Forum for Infiniti M35 and M45, and Nissan Fuga owners.
CTM35X
Posts: 2
Joined: Fri Aug 31, 2007 1:15 pm
Car: M35X

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Does anyone out there have this problem? starting at about 15K miles, the steering on my M jerks when going over roads which are uneven, or have a crown, or are bumpy. Turning off the VDC makes it much better, but not totally. It is now at 33K.

I've brought it to my dealer 4 times - paid for a realignment twice, brakes once, and the third time they told me the tires were 'overinflated', and reduced their cold pressure to 28! This last time, they said they could find nothing wrong. I told them a particular strip of road to drive, and they said nothing was wrong. When I grilled the service rep, however, he said 'well the jitteriness is due to the wide tires of the M on an uneven road' I hit the roof! After pulling out his teeth, he admitted that he hears this problem alot, and in fact some customers don't even want the M as a loaner, because they claim it feels unsafe! My wife agrees, and will not drive the car either.

So, I know I am not the only one with this experience, but does anyone on this forum have suggestions or answers? I love this car, but this problem is enough to make me trade for the BMW my wife wanted.


Hermj
Posts: 33
Joined: Thu Apr 05, 2007 8:03 am
Car: 2007 M35 base and 2006 M35 sport

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I feel you.

I had the same concerns and my fix was wider tires I have a 07 and an 06 I hated the OEM tires on the 07 road noise, wobble etc. I went to a 255/45/18 width on my 07 from a 245/45/18 and my in the road groove road wobble dissapeared.I still have 245 on my 06 and on occassion I feel it and as soon as I it is time for another set I will definitely go to a wider tire........Hope this helps and this is from my personal experience

Hermj

Q45tech
Moderator
Posts: 14296
Joined: Tue Apr 30, 2002 3:19 am
Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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Might be easier to get your local road fixed to comply with Nissan standards?

Are you sure an equal width tired BMW will be better?

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szh
Posts: 15932
Joined: Tue Jul 23, 2002 12:54 pm
Car: 2018 Tesla Model 3.

Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO!
Location: San Jose, CA

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Now, now, Dennis, don't tease us all too much!

Seriously, a couple of things that may be worth looking at:

1. First, do not reduce your tire pressure to 28 psi. That is unsafely low. The tire load capacity goes down with pressure and the load index will be too low at that low a pressure.

2. How worn are your tires? You may consider swapping them for another brand entirely. Remove the All-Seasons that came with the car and put on some better tracking tires. High-performance summer tires may do wonders ... like the Goodyear Eagle F1 GS-D3 or Michelin Pilot PS2. You may also try the new Michelin Pilot Exalto - more of a Touring tire - and see if that makes it better.

3. Of course, if you get summer tires and it snows in winter where you live, then get another set of cheap wheels with snow tires too ... even though your car is AWD, the summer tires will not do well in cold weather.

If not, I'd certainly contact Infiniti Corporate for some help with this. Number is in your Owner's Manual.

Z

CTM35X
Posts: 2
Joined: Fri Aug 31, 2007 1:15 pm
Car: M35X

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Thank you for your suggestions. I think that wear on the OEM tires is a very good thought. I looked up reviews at Tire Rack, and the Eagle RS-A were not exactly stellar. So even though they have a good deal of tread on them, I will replace them with the Michelin Pilot PS2s. I will try the same wheel size first, since the car did not have this problem at all for the first 15K miles or so.

Yes, I live in Connecticut, and we do have winters. In the past, I have not gotten snows on wheels, but have just changed tires on the OEM wheels. Is there any problem with this approach as far as damage to the tires? What do most people do?

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szh
Posts: 15932
Joined: Tue Jul 23, 2002 12:54 pm
Car: 2018 Tesla Model 3.

Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO!
Location: San Jose, CA

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CTM35X wrote:Thank you for your suggestions. I think that wear on the OEM tires is a very good thought. I looked up reviews at Tire Rack, and the Eagle RS-A were not exactly stellar. So even though they have a good deal of tread on them, I will replace them with the Michelin Pilot PS2s. I will try the same wheel size first, since the car did not have this problem at all for the first 15K miles or so.
Definitely a good idea to punt the RS-A. I have used this tire, and it is a poor tire for sure! Over-priced and under-performing. Yes, they last a long time, but the performance after 3/4 to 1/2 tread is poor.
CTM35X wrote:Yes, I live in Connecticut, and we do have winters. In the past, I have not gotten snows on wheels, but have just changed tires on the OEM wheels. Is there any problem with this approach as far as damage to the tires? What do most people do?
Most good to excellent summer tires will not do well in cold weather - even if just above freezing. So, replacing with good snow tires in winter is a good idea. Some people are willing to accept the cost of mounting/balancing twice a year - and if you can schedule it conveniently when snow starts up!

My personal experience (lived in New England for many years) was that it was easier to have the snow tires mounted on cheap steel wheels that I could put on myself (in my garage) if I saw snow outside! Less cost too in the long run - avoided the twice-yearly mounting/rebalancing cost (runs about $20 per tire in most places). Although, I suppose it is another way to ensure that the tires are balanced regularly , but since I do rebalances every 3k miles anyway, it was not an issue for me, even when I lived in New England.

Z


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