Problems · NHTSA complaints
2001 Infiniti QX4 problems
Owners filed 75 complaints about the 2001 Infiniti QX4 with NHTSA between Dec 2000 and Jul 2022. The most-cited component is equipment (18).
Complaints
75
Filed with NHTSA
Crashes
7
Reported by owners
Fires
0
Reported by owners
Injuries
2
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Equipment18
- Structure17
- Suspension12
- Steering6
- Power train6
- Wheels4
- Fuel system, gasoline4
- Engine and engine cooling4
- Visibility3
- Fuel/propulsion system2
- Service brakes, hydraulic2
- Electrical system2
- Tires2
- Air bags2
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 7, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
5
4
3
6
1
8
3
5
5
2
13
2
2
2
4
2
1
1
1
0
0
4
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2000 | 1 |
| 2001 | 5 |
| 2002 | 4 |
| 2003 | 3 |
| 2004 | 6 |
| 2005 | 1 |
| 2006 | 8 |
| 2007 | 3 |
| 2008 | 5 |
| 2009 | 5 |
| 2010 | 2 |
| 2011 | 13 |
| 2012 | 2 |
| 2013 | 2 |
| 2014 | 2 |
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 4 |
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
Equipment
18 reports
“2001 INFINITI QX4. CONSUMER STATES THE FRONT RIGHT SIDE OF THE UNIBODY FRAME HAS RUSTED OUT DANGEROUSLY AT THE AREA OF THE LOWER CONTROL ARM INTERSECTION *TGW THE CONSUMER STATED THE FRAME HAD TO BE RE-WELDED. THE CONSUMER WAS INFORMED THE AIR CONDITIONING DRAIN LINE DRIPPED DIRECTLY ON THE SPOT OF THE CORROSION. *JB”
Structure
17 reports1 related recall
“Lower control arm broke due to excessive rust/ corrosion on ENTIRE underside of vehicle. Nearly caused accident . Scared the bejesus out of us . Now afraid to drive.”
Suspension
12 reports
“The contact owns a 2001 Infiniti QX4. The contact stated that while driving at unknown speed, there was an abnormal noise coming from the rear of the vehicle. The vehicle was taken to an independent mechanic where it was diagnosed that the rear struts and rear brackets needed to be replaced due to corrosion. The vehicle was taken to the dealer where they declined to repair the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 270,000.”
Steering
6 reports1 related recall
“passenger side bottom carriage is completely rusted. steering wheel shakes car makes knocking noise. just noticed there was a recall on it. i’ve only had this vehicle 7 months with 90,000 miles on it.”
Power train
6 reports1 crash
“PROBLEMS WITH THE TRANSMISSION, ENGINE BELTS, TRANSMISSION FLUID LEAKAGE, ETC... *PH TRANSMISSION FLUID LEAKING, ENGINE BELTS ARE CRACKING AND THERE ARE PROBLEMS WITH THE BATTERY.*MR”
Wheels
4 reports
“Its the wheel stud on the driver side left rear....it departed from the vehicke at 55 mph.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 7, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.