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
01 —By component

Complaints by component

One complaint can cite several components
  1. Tires3
  2. Structure2
  3. Wheels2
  4. Steering1
  5. Suspension1
  6. 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
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
20001
20010
20022
20030
20040
20053
20061
20071
20080
20090
20100
20110
20120
20130
20141

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

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.”
Owner complaint to NHTSAFiled Aug 2, 2006TiresODI 10164229

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”
Owner complaint to NHTSAFiled May 8, 2007StructureODI 10190170

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”
Owner complaint to NHTSAFiled Dec 30, 2005WheelsODI 10147548

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”
Owner complaint to NHTSAFiled Apr 9, 2014Steering, SuspensionCrash reportedODI 10578569

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”
Owner complaint to NHTSAFiled Feb 27, 2002Vehicle speed controlODI 564498
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.