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Infiniti M35/M45 Maintenance and Repair

1168 messages,  Last post on Nov 08, 2009 at 7:29 AM

You are in the Infiniti M35/M45 Forum. Your Hosts are pat & karens

What is this discussion about? Infiniti M35, Infiniti M45, Sedan


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#1001 of 1168
rattle in passenger compartment by nolan001
Dec 03, 2008 (3:47 pm)
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Just wanted to share a humerous happening about a rattle. Bought a new m35x about a year and half ago. For two months from the time I bought it I heard a rattle evertime I would hit a bump or a washboard type road. Went crazy trying to find the rattle. One day for some reason(even though I don't where sun glasses) I opened the sunglass holder in the roof console. Someone at the dealership had left a pair of great looking sunglasses in the holder. Removed the glasses and the rattle disappeared. Have slept well since.
#1003 of 1168
Re: 2006 M35 sport steering issue by southbay1
Dec 19, 2008 (9:14 pm)
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Replying to: barryend (Nov 19, 2008 10:52 pm)

I too am experiencing the steering defect and extremely low gas mileage (~14 mpg in local driving) with my '06 Sport (27,000 miles). I just bought it this past summer (came off of a two year lease) and generally like the car but am now wondering if I made the right choice.
 
Before I go back to my dealer about the steering rack does anyone know if this fix is covered by the warranty and if this is indeed the best way to correct the issue? The gas mileage sucks but that I can live with for now - the steering problem not so much.
#1004 of 1168
by ghstudio
Dec 19, 2008 (9:35 pm)
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The steering problem may be a faulty rack which would be covered under warranty. Your service manager has to see/feel the problem driving the car and sometimes that's the tough part.
#1005 of 1168
Re: 2006 M35 sport steering issue [southbay1] by tmartin63
Dec 20, 2008 (5:19 am)
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Replying to: southbay1 (Dec 19, 2008 9:14 pm)

I'd be concerned about the 14 mpg city too. My '07 gets 17.5 mpg city and I drive it fairly aggressively. Are going around all day with your right foot on the floor? If not, I'd question why only 14 mpg.
#1006 of 1168
Re: [ghstudio] by barryend
Dec 20, 2008 (5:46 am)
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Replying to: ghstudio (Dec 19, 2008 9:35 pm)

I have a 2006 M35X. Tracking was dangerous. My steering rack was replaced under warranty in 2007 and that helped allot. Shortly thereafter I replaced the horrible 27,000 mile OEM Goodyear GT-A tires with Continental Contacts. That helped even more. They greatly improved wet and snow traction and softened the ride.
 
The M still does not track that well but the roads in my Westchester, NY area are horrible. Otherwise the car is great.
 
My theory is the design of the steering lacks caster in the alignment. It is incurable. More caster would increase the steering's tendency to go straight.
 
Gas mileage is not very good. Killed me last summer. It is a heavy car with 4-wheel drive and the top gearing is low. No 7-speed on the M35X even for 2009. No real cure. Go light on the pedal and easy on the a/c. Keep the air cleaner clean. Sluggish on regular gas use mid grade or premium.
 
My lease is over soon. Thinking of Audi an A4 (a bit small not cheap but wonderful),
Caddy CTS 4 wheel drive (beautiful, aggressive prices, no backup camera, great warranty, On Star, but who knows about GM service and quality?)
Infiniti G-37 sedan (a bit small and rear seats do not fold down),
Good but uglies: Acura TL and Infiniti FX. (don't know if I can look at those for years).
#1007 of 1168
Re: 2006 M35 sport steering issue [tmartin63] by southbay1
Dec 22, 2008 (3:13 pm)
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Replying to: tmartin63 (Dec 20, 2008 5:19 am)

My driving is almost always local and I'm actually driving fairly easy to get the 14 MPG -- driving it hard brings it down closer to 12. Based on consumption history in the computer the best the previous driver did was about 18 mpg (assume that was more highway miles). With gas below $2/gal it's just an annoyance but I'd sure love the additional gear.
 
As for the steering rack - I'll make an appointment with my service rep and hope that they notice the same thing I do (somehow I suspect that Murphy's Law will temporarily disappear...). The car has OEM Bridgestone Potenza RE050As that have a fair amount of mileage left on them and none of the boards have pointed to these tires as a culprit. Will keep you all posted.
#1008 of 1168
Re: 2006 M35 sport steering issue [southbay1] by barryend
Dec 22, 2008 (3:42 pm)
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Replying to: southbay1 (Dec 22, 2008 3:13 pm)

The 4 wheel drive should use more gas than the rear wheel drive. I cannot understand your low mileage. Maybe it is allot of hills and heavy traffic.
#1009 of 1168
Re: [barryend] by tmartin63
Dec 23, 2008 (9:01 pm)
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Replying to: barryend (Dec 20, 2008 5:46 am)

Have a '06 Caddy CTS 3.6 (wife's car). 58k trouble free miles. My '02 Olds Intrigue .. 100k trouble free before I sold it to my neice 3 yrs ago - still driving it. My point is GM builds some very good/reliable/affordable cars. Don't shy away from the '09 CTS. It's prob what I'll buy next yr when the '06 comes off smartbuy.
#1010 of 1168
Re: 2006 M35 sport steering issue [barryend] by southbay1
Dec 31, 2008 (3:00 pm)
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Replying to: barryend (Dec 22, 2008 3:42 pm)

So I went to the dealer this morning (Infiniti of South Bay) and took the technician for a drive. They had never heard of any other M35/45 having the issues I was experiencing which is no surprise - they don't want to admit there is a problem). During the test drive the car tramlined (as expected) but they said that that is normal driving characteristic of the M35.
 
Dutifully, they checked the alignment and found nothing out of the ordinary and said that the grabby/wandering steering is typical of a "sport" model with 19" wheels and low profile tires, particularly on bumpy/uneven road surfaces. Unless Infiniti issues a technical bulletin they are not going to be doing any steering rack work. I also asked the service manager about gas mileage and he said that 14-15 MPG is typical of what they're seeing until the car is sufficiently broken in and after which it should get closer to 18 MPG (apparently 27K miles is not broken in enough).

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