Problems · NHTSA complaints
1999 Infiniti Q45 problems
Owners filed 9 complaints about the 1999 Infiniti Q45 with NHTSA between Jun 2000 and Apr 2014. The most-cited component is tires (3).
Complaints
9
Filed with NHTSA
Crashes
2
Reported by owners
Fires
0
Reported by owners
Injuries
1
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Tires3
- Structure2
- Wheels2
- Steering1
- Suspension1
- Vehicle speed control1
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 13, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
0
2
0
0
3
1
1
0
0
0
0
0
0
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2000 | 1 |
| 2001 | 0 |
| 2002 | 2 |
| 2003 | 0 |
| 2004 | 0 |
| 2005 | 3 |
| 2006 | 1 |
| 2007 | 1 |
| 2008 | 0 |
| 2009 | 0 |
| 2010 | 0 |
| 2011 | 0 |
| 2012 | 0 |
| 2013 | 0 |
| 2014 | 1 |
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.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Tires
3 reports1 crash
“DT*: THE CONTACT STATED THE DRIVER'S SIDE REAR TIRE BLEW OUT WHILE DRIVING ON THE FREEWAY AT 20 MPH. THE CONTACT STATED THE TIRES WERE MAINTAINED WELL AT 35PSI. THERE WERE NO PROBLEMS WITH THE STEERING PRIOR TO THE INCIDENT.”
Structure
2 reports
“WHILE CHECKING THE OIL IN THE 1999 Q45 INFINITI THE HOOD SUDDENLY FELL AND SLAMMED CLOSED. THIS HAPPENED IN JANUARY 2007 ,AND AGAIN MARCH 2007. ALL THREE TIMES I HAD TURNED AWAY MOMENTARILY AND WAS NOT INJURED. SINCE THE EXPERIENCE IN APRIL I NOW CARRY A PROP STICK AS A PRECAUTION. THE PROBLEM APPEARED INTERMITTENT AND DEPEND ON THE AMBIENT TEMPERATURE. THE COOLER IT WAS THE MORE LIKELY IT WOULD HAPPEN. SINCE THIS FIRST OCCURRENCE I HAVE SEARCHED FOR AFTER MARKET PARTS TO REPLACE THE LIFT SUPPORTS, BUT WAS UNABLE TO FIND ANY RESOURCE. THE AFTERMARKET PARTS WERE ONLY AVAILABLE FOR Q45 HOODS UP TO AND INCLUDING 1996 MODELS. I DID NOT KNOW IF DEALER PARTS WERE AVAILABLE BECAUSE MY SEARCHES HAVE NOT BEEN ABLE TO FIND A DEALER SOURCE FOR THAT PARTICULAR PART. I BELIEVE THIS WAS A MAJOR SAFETY PROBLEM THAT COULD LEAD TO SERIOUS INJURY OR DEATH IF A HOOD SLAMMED DOWN ON SOMEONE WHILE WORKING UNDER THE HOOD. A TECHNICAL SERVICE BULLETIN (TSB) WOULD ALERT ALL OWNERS OF THIS AUTOMOBILE TO THE POTENTIAL DANGER, AND RECOMMEND TO THE MANUFACTURER TO ADDRESS THIS PROBLEM AS WARRANTED.*AK”
Wheels
2 reports
“1999 INFINITY Q-45 WHEELS HAVE A CASTING DEFECT THAT DEVELOPS CRACKS WHEN THE VEHICLE IS DRIVEN. *TS THE WHEELS ARE THE SAME AS THE 2000 Q45 WHICH WAS RECALLED (03V-098). THE CONSUMER CONTACTED THE MANUFACTURER BUT SINCE THE VEHICLE WAS OVER 100000 MILES THEY REFUSED TO PROVIDE ASSISTANCE. *NM”
Steering
1 report1 crash
“LEFT FRONT STRUT SPRING BROKE WHILE IN TRAFFIC, SENDING BROKEN SPRING END INTO TIRE RIPPING THE ENTIRE SIDEWALL OF THE TIRE OUT. BLOWOUT CAUSED LOSS OF STEERING WHILE IN THE PROCESS SENT VEHICLE INTO ONCOMING TRAFFIC. *TR”
Suspension
1 report1 crash
Vehicle speed control
1 report
“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. *SLC”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 13, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.