Problems · NHTSA complaints

2005 Infiniti Q45 problems

Owners filed 4 complaints about the 2005 Infiniti Q45 with NHTSA between Oct 2007 and Jan 2019. The most-cited component is vehicle speed control (1).

Complaints
4
Filed with NHTSA
Crashes
1
Reported by owners
Fires
0
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Vehicle speed control1
  2. Air bags1
  3. Seats1
  4. Tires1
  5. Electrical system1

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 11, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20071
20080
20090
20100
20111
20121
20130
20140
20150
20160
20170
20180
20191

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Vehicle speed control

1 report
“WHEN CRUISE CONTROL IS SET, AND THE NEED TO PASS OR SPEED UP IS REQUIRED, IF YOU PRESS THE GAS PEDAL TO THE FLOOR THE CAR TAKES OFF AND *THEN STOPS RESPONDING AND DROPS BACK TO SET CRUISE CONTROL SPEED WHILE YOU ARE STILL FLOORING IT. IT BUCKS BACK AND FORTH. I SPOKE TO SEVERAL OWNERS ON A INFINITI OWNERS SITE AND THERES PERFORMS THE SAME. ITS DANGEROUS IF THE NEED TO SPEED UP OCCURS. THIS IS A PROBLEM IN THE CODING OF THE PARAMETERS IN THE ECU AND COULD BE DEADLY WITH UNEXPECTED PERFORMANCE. THIS HAPPENED ON I40 IN KNOXVILLE TENNESSEE IN HEAVY TRAFFIC. THIS CONDITION CAN BE REPEATED BACK TO BACK MULTIPLE TIMES.”
Owner complaint to NHTSAFiled Jan 26, 2019Vehicle speed controlODI 11172224

Air bags

1 report1 crash1 related recall
“TL* THE CONTACT OWNS A 2005 INFINITI Q45. THE CONTACT STATED THAT WHILE DRIVING 35 MPH, ANOTHER VEHICLE CRASHED INTO HER PASSENGER SIDE. THE AIR BAGS DID NOT DEPLOY AND THE FRONT DRIVER'S SEAT TWISTED TOWARD THE DRIVER'S DOOR DURING THE CRASH. THE CONTACT SUFFERED INJURIES AND WAS TAKEN TO THE HOSPITAL. THE VEHICLE WAS TOWED TO THE CONTACT'S HOME. THE FAILURE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 117,000.”
Owner complaint to NHTSAFiled Jun 20, 2012Air bags, SeatsCrash reportedODI 10462372

Seats

1 report1 crash

Tires

1 report
“I PURCHASED 4 NEW TIRES FOR MY VEHICLE ON 7/24/2010 THE TIRES IN QUESTION ARE MICHELIN P245/45R18 PRIMACY MXV4 96V. AFTER ONLY 3500 MILES THE REAR RIGHT TIRE BLEW ON THE HIGHWAY, FORTUNATELY FOR ME THERE WAS HEAVY TRAFFIC AND I WAS NOT DOING OVER 30MPH. THE TIRE WAS REPLACED WITH THE SPARE TIRE AND THEN IT WAS DISCOVERED A 3" GASH FROM THE SIDE WALL TO THE FIRST THREAD. NO FOREIGN OBJECTS WERE FOUND IN THE TIRE TO SUGGEST THAT I PICKED SOMETHING ON THE ROAD,HOWEVER I DID NOTICE THAT THE REINFORCEMENTS WERE RIPPED I AM CONCERNED ABOUT THE SAFETY OF THESE TIRES AND HAVE KEPT THE DAMAGED TIRE FOR INSPECTION FOR ANYONE WHO MAY WANT TO INVESTIGATE. THANK YOU. *TR”
Owner complaint to NHTSAFiled Jan 14, 2011TiresODI 10376662

Electrical system

1 report
“TL*THE CONTACT OWNS A 2005 INFINITI Q45. WHILE THE VEHICLE WAS PARKED, THE CONTACT ATTEMPTED TO START THE VEHICLE; HOWEVER, THE KEY WOULD NOT TURN IN THE IGNITION. SHE CALLED AAA TO GET THE VEHICLE TO START. THE VEHICLE WAS TAKEN TO THE DEALER FOR SERVICE, BUT NO FAILURES WERE FOUND AT THAT TIME. THE CURRENT MILEAGE WAS 28,000 AND FAILURE MILEAGE WAS 17,000. UPDATED 01/02/08. *LJ UPDATED 12/12/07 *TR”
Owner complaint to NHTSAFiled Oct 17, 2007Electrical systemODI 10206126
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.