Vehicle Speed Control Problems of Infiniti Q45

The circuit board for crank position sensor and cam position sensor have improper solder joints. This has caused the service engine light to come on, the engine may not start, power reduces, engine stalls at a traffic light or while in motion, on a city street or highway or while making a turn. This is also a common problem with the 2002 Infiniti m45, Q45; 2003 Infiniti i35, m45; 2003 Nissan altima, maxima, murano, sentra. There are 11 consumer complaints, 3 investigations and 33 service bulletins regarding this issue with the 2003 Q45. Infiniti/Nissan recall # 03v455000.

See all problems of the 2003 Infiniti Q45 🔎.

Was on the highway takings grandkids home and the car just cut off right in the middle of a busy highway. It took several tries to get it to start again but it stayed on only long though for me to get it on the shoulder. We could have been in a serious wreck. It is only by the grace of god and functional hazard lights that we and other vehicles weren't injured. We had to be towed because we were too far from an exit to risk trying to drive it any further!.

See all problems of the 2002 Infiniti Q45 🔎.

1 - there is up to a two second delay when quick acceleration is required. At times it feels as if the engine completely stalled. 2 - the vehicle often will not downshift to slow the vehicle on a hill. I could be in 5th gear at around only 1800 rpm, and when I downshift twice, it will not go to 3rd. I often have to downshift up to 6 times for it to respond and switch to third. I need to take my eyes off the road to constantly check if I'm in the gear I select. 3 - the parking/emergency break will not hold the fully loaded vehicle on a hill. If the transmission in park fails, the vehicle will roll. All issues are considered to be normal by the manufacturer. They corrected the problem on their new 2005 version and refuse to do so on my vehicle.

Consumer stated that the gas pedal would not engage readily, when pressing the gas pedal from a stopped position, the vehicle would not move, then more force would be used on the gas pedal and vehicle would lurch forward, the dealer cleaned the throttle chamber.

See all problems of the 1999 Infiniti Q45 🔎.