Problems · NHTSA complaints
2005 Infiniti QX56 problems
Owners filed 80 complaints about the 2005 Infiniti QX56 with NHTSA between Apr 2005 and Nov 2024. The most-cited component is service brakes (22).
Complaints
80
Filed with NHTSA
Crashes
2
Reported by owners
Fires
0
Reported by owners
Injuries
6
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Service brakes22
- Fuel/propulsion system12
- Fuel system, gasoline11
- Service brakes, hydraulic9
- Electrical system7
- Exterior lighting5
- Air bags5
- Power train5
- Steering4
- Fuel system, other3
- Engine and engine cooling3
- Engine2
- Suspension2
- Service brakes, electric2
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 Oct 29, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
3
1
3
1
0
7
6
7
7
13
5
7
7
3
5
2
1
1
0
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2005 | 3 |
| 2006 | 1 |
| 2007 | 3 |
| 2008 | 1 |
| 2009 | 0 |
| 2010 | 7 |
| 2011 | 6 |
| 2012 | 7 |
| 2013 | 7 |
| 2014 | 13 |
| 2015 | 5 |
| 2016 | 7 |
| 2017 | 7 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 0 |
| 2024 | 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
Service brakes
22 reports
“I started to break saw a major traffic jam . And my steering started shaking and my breaks did not Stop like they're supposed to.almost was i huge crash w I th my [XXX] and [XXX] old”
Fuel/propulsion system
12 reports
“FUEL GAUGE SHOWS 1/4 TANK BUT IT IS EMPTY. THIS CAUSED THE VEHICLE TO STALL ON THE HIGHWAY. VERY DANGEROUS SITUATION COULD HAVE OCCURRED. WAS ABLE TO FIND SAFETY BESIDE THE HIGHWAY BUT THANKFUL IT DID NOT HAPPEN IN THE MIDDLE OF A BUSY HIGHWAY.”
Fuel system, gasoline
11 reports
“TL* THE CONTACT OWNS A 2005 INFINITI QX56. WHILE DRIVING AT 65 MPH, THE VEHICLE SHUT OFF DUE TO LOW FUEL. THE CONTACT MENTIONED THAT THE LOW FUEL WARNING LIGHT FAILED TO ILLUMINATE. THE VEHICLE WAS REFUELED AND THE VEHICLE FUNCTIONED AS NORMAL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 148,000. UPDATED 6/22/15*CN”
Service brakes, hydraulic
9 reports
“VEHICLE WAS PURCHASED USED IN DECEMBER 2009. STARTED NOTICING BRAKE SQUEALING & GRINDING, FRONT & REAR BRAKES HAD TO BE REPLACED IN FEBRUARY 2012. AFTER BRAKES WERE REPLACED THERE WAS AN INCIDENT BACKING OUT OF A DRIVEWAY WHILE BRAKING, HAD ONLY 20% BRAKES WITH LOUD GRINDING NOISE, BUT NO WARNING LIGHTS CAME ON. DECIDED TO REPLACE ROTORS AFTER THAT INCIDENT IN MARCH 2012. ON APRIL 9TH WHILE LEAVING A GROCERY STORE PARKING LOT GOING APPROX.15MPH, EMERGENCY BRAKE LIKE CAME ON, 95% OF BRAKES WERE LOST, LOUD GRINDING NOISE WHEN TRYING TO BRAKE. CAR PUT INTO PARK & TURNED OFF. WHEN TRUCK WAS TURNED BACK ON & BRAKE PEDAL DEPRESSED WHILE IN PARK POSITION, BRAKES SEEMED NORMAL AGAIN. PUT TRUCK INTO DRIVE & SECONDS LATER THE EMERGENCY BRAKE LIGHT CAME BACK ON & 95% OF BRAKING SYSTEM WAS LOST AGAIN WITH LOUD GRINDING NOISE. COASTED VEHICLE HOME (LESS THAN 1/4 MILE). HAD VEHICLE TOWED TO INFINITI DEALER WHO IS RECOMMENDING REPLACING THE BRAKE BOOSTER SYSTEM AT A COST OF $1,100. AFTER MUCH RESEARCH ON THIS ISSUE, REPLACING THE BRAKE BOOSTER SYSTEM SOUNDS LIKE A TEMPORARY FIX. WITH A FAMILY OF 7, THIS IS OUR MAIN FAMILY VEHICLE & KNOWING THIS COULD REOCCUR AT ANY MOMENT…”
Electrical system
7 reports
“THE VEHICLE WILL LOSE POWER TO THE BRAKES WHILE DRIVING INTERMITTENTLY. WHEN PROBLEM OCCURS YOU WILL LOSE POWER STEERING AND PRESSURE TO BRAKING SYSTEM. ALSO THE DRIVER HID HEADLAMP GETS MOISTURE IN IT WHENEVER IT RAINS. I HAVE HAD TO REPLACE THE HID BULB ABOUT 6 TIMES IN THE PAST YEAR. ALSO THERE SEEMS TO BE AN ELECTRICAL ISSUE WITH THE ONBOARD COMPUTER THAT CAUSES THE TACHOMETER TO NOT WORK OR READ CORRECTLY.”
Exterior lighting
5 reports
“WHILE DRIVING IN RESIDENTIAL/BUSINESS AREA MY VEHICLE COMPLETELY LOST POWER AND TURNED OFF. I DRIFTED TO THE SIDE OF THE ROAD WITHOUT POWER STEERING. TRIED TO START VEHICLE AGAIN. VEHICLE WOULD START BUT WOULD IMMEDIATELY DIE-WOULD NOT IDLE. AFTER RESTING APPROX 5 MINUTES I WAS ABLE TO START AGAIN AND CONTINUE HOME. THIS HAS HAPPENED 3 TIMES IN THE PAST 2 MONTHS. I AM TERRIFIED TO DRIVE THIS VEHICLE AGAIN. I ALSO CANNOT KEEP THE DRIVERS SIDE HEADLIGHT WORKING. BULBS CONSTANTLY BLOW OUT AT OVER 300.00 DOLLARS EACH. *TR”
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 29, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.