Last post on Dec 29, 2012 at 11:21 AM
You are in the Infiniti M35/M45
What is this discussion about?
Infiniti M35, Infiniti M45, Sedan
#105 of 125 Re: M35x mechanicals compared to G37x [bruceomega]
Feb 12, 2009 (2:41 pm)
From what I am hearing they are going to be making a new M for the 2010 year model which will be a M37 and M50 the M37 will replace the M35 but it will have the same engine as the G37 and 7 speed transmission. The M50 will replace the M45 and have the engine from the 2009 FX50 which is a 5.0L 390Hp 369LBs ft. torque but it maybe a little more now being that all the other competition is now producing V-8 engines with no less than 400 hp. It is said that the 2010 M will look even more like the G37. When the pictures and more info is released we will know more. You can check this info by typing 2010 infiniti m50 into your google or yahoo browser and they will give you the info. Also check infiniti history they talk about it a little there to. Hope this helps God bless.
#106 of 125 2010 Infiniti M37x & M50x Questions?
May 28, 2009 (9:38 pm)
So Infiniti 2010 M's will be redesign similar to Infiniti G sedan with the new V6 engine 3.7L , 7 speed Auto-transmission for the M37(x) & the new V8 engine 5.0L from the FX50, w / 7 speed Auto-transmission for the M50(x).
What is the MPG for city / hwy?
Will the HP & LBs be the same as in the G37 & FX50?
I find the M as an excellent luxury-sport sedan, but the avg. gas milage is very low compare to the Lexus GS & Hyundai Genesis.
#107 of 125 Re: 2010 Infiniti M37x & M50x Questions? [veragen]
May 29, 2009 (4:23 pm)
From what I read a few weeks ago about it, the president from infiniti division said that the M45 can't have less horsepower than the fx50. The gas mileage might still suck because it didn't change much on the 2009 fx50.
Aug 14, 2009 (1:25 am)
Okay, we now know that the '09 M35 (V6) got a boost to 303 HP, while the M45 (V8) stayed the same. The M35x and the M45 still have the 5-speed tranny.
The M35 and M45 HP ratings are now so close that no way can I see the M45 as worthy of its price premium, let alone the M45's strong reputation for oil-burning and engine replacement need!
Too bad the M35x missed the 7-speed auto, but the "x" and M45 have the presumed advantage of a tranny with a great track record, whose only shortcoming vis-a-vis the 7 speed is its short gearing in 5th.
Thanks for the discussion, all. Me, I'm very happy with what I bought!.
-Karl, '09 M35x
#110 of 125 Re: Summary [khaug1]
Aug 14, 2009 (7:00 am)
Congratulations on the new M35X purchase. You will have a lot fun with it I am sure.
As far as the power, Yes, the M35 get boosted to 303hp, but, if you look at the torque, it is actually down a bit. So, it seems that the power difference between M35 and M45 is less. But, keep in mind, it is torque that move the car, the HP is only used for top speed, which nobody will top out, even the M35 on public road - which is something around 155MPH.
So, the M45 still has an noticeable advantage over M35, especially when both mated with 5spd, the gas mileage are basically the same. I would say the M45 is still a better car. But, again, I have a M45 and loves the low to mid range power, which I think is more practical for daily usage (instead of racing).
#111 of 125 2011 M50 [non-x] Re: 2010 Infiniti M37x & M50x Questions? [walt18]
Aug 14, 2009 (10:42 am)
"From what I read a few weeks ago about it, the president from infiniti division said that the M45 can't have less horsepower than the fx50. The gas mileage might still suck because it didn't change much on the 2009 fx50. "
The 2008 FX45 was rated at 13 \ 17.
The 2009 FX50 was rated at 14 \ 20.
Given the rather significant additional HP & TQ
of the 5.0L vs the 4.5L V8s,
the increase in Highway MPG of 3 MPG and
over 17% seems fairly impressive.
Sounds like the 7-speed trans helps accomplish
one intended goal.
The 2009 M45 [ and 2010, if any are actually produced ]
is rated at 16 \ 21.
An equivalent increase in Highway MPG
would bring the M50 [ non-x ] to:
23 or 24 MPG.
[ Math actually works out to 23.52 ]
Not exactly earth-shattering MPG,
but not bad for a fairly heavy sedan
[ almost exactly the same weight as my G8 GT ]
with a V8 developing 390 HP & 369 TQ.
[ Up from 325 \ 336 in the M45 ]
And this would make the M50 more competitive
in the class.
Given a likely weight increase of less than 100 LBS,
I expect that the M50 will deliver a
noticeable increase in acceleration.
I have seen published quarter mile times
in the high 13s & low 14s - at over 100
and 0 to 60 in the 5s for M45s.
And it will cost more than the M45.
[ sigh ]
That is my prediction . . .
We shall see.
Looking forward to seeing what it looks like, tonight
#112 of 125 Re: 2011 M50 [non-x] Re: 2010 Infiniti M37x & M5 Questions? [walt18] [rayainsw]
Aug 15, 2009 (10:04 pm)
We now know that it will not be a M50. It will be called M56 because they are using the 5.6L motor from the nissan titan truck. From the little info they have up now the M56 will have more than 400HP!!! and be even quicker than the previous M45. I think the new style is pretty neat except they need to shave alittle off the front end because it sits to high up. I think if they take a little more of that curve out of the front fenders to make it not look like the Essence it would be even better looking in my opinion. However if not it doesn't matter it still is nice car. I held out buying the 08 or 09 M45 to see what this one was going to be like and glad I did much more worth the money. I ready to place my order already! How do you guys think the gas mileage will be with it being a 5.6L instead of 5.0L? I don't think the price of the car will increase much maybe a few hundred dollars or so.
#113 of 125 My 2009 M35x Is A Lemon!!
Dec 20, 2009 (8:33 pm)
I have owned this car for 4 months and finally negotiated an agreement with Ininiti Consumer Affairs to buy it back after the car stalled on me 4 different times (once in a very dangerous spot on a busy highway) and they could not find the problem. The car spent about over 40 days in the dealership and each time I drove it home the problem would reoccur within a few days. The first Infiniti my family owned was never in the shop for anything other than routine service for the 7 years we owned it. This car was an absolute lemon and it's safe to say I wil not be purchasing an Infiniti product for a very long time if ever!!
#114 of 125 Re: My 2009 M35x Is A Lemon!! [jbzez1985]
Nov 04, 2010 (7:31 pm)
Same problem here. Different answer from Infiniti.
In September/October this year my 15 month old (23K miles) 2009 Infiniti M35X unexpectedly and without warning stalled while the car was moving. This occurred 3 times, twice within a week before the car was serviced to correct the problem cited under NHTSA Item #10032906, Service Bulletin # ITB-10-014 and once after the the vehicle was supposedly fixed. In all three stalls the car was moving at slow speed (<10mph) and low rpm. Two of the stalls occurred while making turns, one in the face of oncoming traffic and one in a parking lot. In none of the three stalls was there any damage or injury. I was extremely lucky in that regard. The Infiniti dealer where I bought the car serviced it and informed me of the previously known and published Technical Service Bulletin cited above. The dealer explained that the "fix" was a fairly simple reprogramming of the ECM. Notwithstanding that, the vehicle stalled again within two weeks after the fix. I returned it and, of course, the dealer could not replicate the problem. I contacted Infiniti national Consumer Affairs who told me that since the dealer could not replicate the problem, there was nothing more that Infiniti would/could do. My problem with this experience is threefold: 1) Infiniti knew there was a defect with the vehicle that could cause it to stall without warning and they didn't notify me (or anyone else to my knowledge) to bring it in to make the "simple fix" before it stalled. 2) The vehicle stalled again after the "fix" was made and 3) I have no idea whether it is going to stall again. Neither does Infiniti. They knew there was a potential problem but took no action to minimize the potental for damage/injury. I told them I was not comfortable being in this situation and asked them to repurchase the car. (There have been multiple other problems with this vehicle in 15 months: inop sunroof at delivery; complete front rack & pinion assembly replaced; failed battery replaced; front brake rotors turned at less than 20K mi; seat positioning system erratic) Infiniti refused. I believe, based upon my first hand experience, that this is a safety issue. It may not be on the scale of Toyota's sudden acceleration problem. But it's not something a responsible company suffers its customers to experience while hiding behind a TSB. I submitted a safety complaint to the NHTSB and thought any of you owning or considering owning this vehicle might like to know. I believe Infiniti makes good vehicles. I just didn't get one. M-