Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2007 Infiniti M35 owners, lightly cleaned up (personal details are redacted by NHTSA).
I am filing a complaint regarding a safety-related failure of the driver's seat bracket in my vehicle. The bracket has broken, causing the driver's seat to rock back and forth while the vehicle is in motion. I took the vehicle to an authorized dealer for inspection, and they confirmed that the seat bracket has failed. I was also informed that the replacement part is no longer in production and is unavailable. This condition poses a significant safety risk. A loose or unstable driver's seat can impair vehicle control, increase driver distraction, and reduce the effectiveness of seatbelt and airbag systems in the event of a crash. As a result, this defect substantially increases the likelihood of an accident and the risk of serious injury. I am aware that there have been numerous similar complaints regarding this issue, yet no recall has been issued. …
I was driving home recently and the back of my seat near the base gave out on me, the lower back/bottom raising motor was working but the seat was not going up. Upon inspection I found that the welds on the seat bracket had broken, going online and searching found me countless forums of seat brackets breaking during driving. Two main issues with this 1. I almost lost control due to the sudden drop 2. If I was to get into a collision the seat is not secure whatsoever. This is not an uncommon issue and I am astonished no recall has been given Sources of similarity [redacted]
During normal operation, the seat has failed in it's original design intent. I believe that the a failure in some component under the seat caused stress on the pivot point for up-down movement in the seat and over an extended period of time the point finally sheared. I believe the extensive stress was caused because of the automatic seat movement that occurs when the driver enters and exits the vehicle the bracket which allows the seat to move up and down with the powered control has failed on both sides of the left front bucket seat. The seat now moves freely forward and back and poses a serious safety risk to myself and anyone else who might be driving the vehicle. This puts me in a terrible position because as a concerned consumer I have to worry about the fact that an accident could be fatal due to component failures. …
While driving my 2007 Infiniti m35x, the driver's side seat back broke loose on the door side of the seat. Afterward, it moved around and I considered it unsafe to drive, not knowing how severe the problem would become. Apparently, this is a fairly common problem as I have seen multiple complaints online on both the 2007 and 2006 models of this car. It is on the customer to pay to fix this problem as the car was out of warranty coverage. The net charge to fix my problem was $1,310.05. This is a real safety issue and could have caused a calamity if the incident had occurred at speed on the highway, a real possibility as I am in sales and use the car for my job.
Tl* the contact owns a 2007 Infiniti M35. The contact stated that driver side seat belt failed and the seat looked as if it were positioned incorrectly and unbalanced. When the contact attempted to adjust the seat, it failed to move without warning. The vehicle was taken to the local dealer (Infiniti suitland, 4800 branch ave, suitland, md, 20746) where it was diagnosed that the frame /lever failed and that the entire seat needed to be replaced. The vehicle was not repaired. The manufacturer informed the contact that there was no recall and that the replacement would be an out of pocket expense. The failure mileage was approximately 130,000.
While driving on a parkway in rush hour traffic the drivers seat suddenly dropped, making it difficult to see over the steering wheel. I am 6 ft. 1 in. Tall. It is my opinion someone 5 ft. 8 in. Tall would not be able to see over the dashboard. I took the vehicle to the Infiniti dealer who diagnosed the problem as a broken lower seat track weld which had to be replaced at the vehicle owners cost of $1,519. It appears that there has been approximately 25 previous reports of this type of problem and perhaps many others that have not been reported. It seems that this is a safety issue and should warrant a manufacturers recall.
A weld broke on the drivers seat base, this caused the seat to lean towards the console and as the seat was raised it got worse. Also when you grabbed the head rest and pushed it towards the front of the car the seal would then lift up. I bought a new seat base ( $ 1,000.00 + taxes ) and have replaced the base. I cannot say exactly when it happened as I left the car with my brother in-law to drive while I was on holidays and noticed the seat was sitting crooked when he picked me up from the airport. The car has 70,132 miles on it.
As I was driving on a normal city street in regular traffic, the driver seat suddenly started moving forward, powered by the seat control. I reached down to push the lever/seat control back, but the seat motor would not stop; it pushed the seat fully forward. I stopped the car to move it back and was unable to. The other seat functions worked: up, down, tilt, etc. This has happened on four separate occasions. The last three times the seat motor has started working again of its own accord. This time it is still stuck forward.
The left front driver seat began moving slightly FWD/back when braking and accelerating at @ 75K miles. Then that assembly just broke (seat settled) as I got in the car one day and I can no longer move it back and forth or up/down at all. So rail broke and then the seat motor died. I have read of so many of these stories with this year vehicle. Upon research, I found they only used this assy from 5/2006 to 9/2007. I have to believe Nissan/Infiniti knew they had an issue with this design.
My M35 (2007) driver's seat suddenly is "off track". It looks like it's still in the floor tracks, but it has moved about 3 inches to the right to the extent that it now rubs on the center console every time it moves back and forth. There is no longer a gap between the seat and the console, like there is on the passenger seat. What happened, and what do I do? It also moves from side to side and I can move the entire seat by grabbing the headrest. The seat moves when the car is in motion
Seat complaints in other M35 years
Frequently asked questions
How common are seat problems on the 2007 Infiniti M35?
NHTSA has 40 complaints about the seats of the 2007 Infiniti M35, 26% of the model year's 155 complaints.
Is there a recall for 2007 Infiniti M35 seat problems?
No. NHTSA lists no seats recall for the 2007 Infiniti M35, though it has 4 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2007 Infiniti M35 seat problems start?
Half of the complaints with a recorded mileage happened before about 100,000 miles.
Is it dangerous?
Owners linked 0 crashes, 0 fires and 1 injury to seats problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.