2003 Infiniti QX4 problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
20 owner complaints analyzed
3 distinct recall campaigns
98,050 mi median reported failure mileage
Scope: 2003 model year. Data snapshot: . 15 complaints include usable failure mileage.
Most common problems
Structure:Body is the most frequently named component, appearing in 3 of 20 complaints (15.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Braking behavior | 5 | 25.0% |
| Steering behavior | 4 | 20.0% |
| Engine operation | 1 | 5.0% |
| Electrical and battery issues | 1 | 5.0% |
| Fuel system concerns | 1 | 5.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Structure:Body | 3 |
| Suspension | 3 |
| Suspension:Front | 3 |
| Suspension:Front:Macpherson Strut | 3 |
| Service Brakes, Hydraulic | 2 |
| Steering | 2 |
| Structure | 2 |
| Air Bags | 1 |
Structure:Body: 3; Suspension: 3; Suspension:Front: 3; Suspension:Front:Macpherson Strut: 3; Service Brakes, Hydraulic: 2; Steering: 2; Structure: 2; Air Bags: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 2 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 2 |
| 75,000 to 99,999 | 4 |
| 100,000 to 149,999 | 3 |
| 150,000 and above | 4 |
Under 25,000: 2; 25,000 to 49,999: 0; 50,000 to 74,999: 2; 75,000 to 99,999: 4; 100,000 to 149,999: 3; 150,000 and above: 4
75,000 to 99,999 miles has the most reports with usable mileage (4). 5 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2003 | 1 |
| 2004 | 1 |
| 2009 | 3 |
| 2010 | 2 |
| 2011 | 3 |
| 2012 | 2 |
| 2014 | 2 |
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 1 |
2003: 1; 2004: 1; 2009: 3; 2010: 2; 2011: 3; 2012: 2; 2014: 2; 2016: 1; 2017: 1; 2018: 3; 2019: 1
Pattern summary
Structure:Body leads the component reports. Braking behavior appears in 5 complaint narratives. Steering behavior appears in 4 complaint narratives. Engine operation appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 10042958 · 2003-10-15 (October 15, 2003)
WHILE DRIVING AT 35 MPH ON A DRY SINGLE LANE PAVED ROAD, I UNAVOIDABLY RAN MY INFINITI QX4 SUV OVER A TREE BRANCH IN THE ROAD. THE TREE BRANCH BRIEFLY BECAME ENTANGLED UNDER THE VEHICLE AND THEN WAS EXPELLED. ONCE THE TREE BRANCH WAS RELEASED, MY ABS LIGHT CAME ON. I TOOK MY VEHICLE TO MY INIFINITI DEALER WHO PUT THE VEHICLE ON A LIFT. EXAMINATION SHOWED NO DAMAGE TO THE VEHICLE OTHER THAN THE WIRING ASSEMBLY TO THE FRONT WHEEL SENSOR HAD ITS WIRE AND ELECTRICAL PIN PULLED FROM THE ELECTRICAL CONNECTOR TO THE FRONT WHEEL SENSOR. ABS FOR TH…
Owner-reported narrative. 5,900 miles reported. Look up ODI 10042958 at NHTSA ↗
Owner report 10055745 · 2004-01-23 (January 23, 2004)
THERE WAS A SEVERE PULSATION IN THE REAR OF THE VEHICLE WHEN THE BRAKE WERE APPLIED. THE DEALERSHIP SERVICED THE VEHICLE OVER 20 TIMES. *JB
Owner-reported narrative. 6,000 miles reported. Look up ODI 10055745 at NHTSA ↗
Owner report 10261720 · 2009-03-13 (March 13, 2009)
WHILE DRIVING MY 2003 INFINITI QX4 ON THE HIGHWAY, I NOTICED A SEVERE VIBRATION COMING FROM THE LEFT SIDE OF MY VEHICLE AND TIRE. I TOOK IT TO A LOCAL SERVICE REPAIR SHOP AND THEY TOOK OFF MY LEFT FRONT TIRE AND SAW WHERE MY INNER APRON WAS SEVERELY CORRODED, CRACKED AND PERFORATED.THEY STATED THEY NEVER SEEN SUCH A TYPE OF CORROSION IN THIS AREA AND THAT I SHOULD HAVE THE MANUFACTURER LOOK AT IT AND TAKE IT TO A BODY SHOP. THEY STATED THAT THE VEHICLE SHOULD BE REPAIRED AS SOON AS POSSIBLE AS IT WAS A SERIOUS SAFETY RISK AS THE STRUT TOWER C…
Owner-reported narrative. Look up ODI 10261720 at NHTSA ↗
Owner report 10325016 · 2010-04-12 (April 12, 2010)
THERE IS A PULSING FEEL IN THE BRAKES. HAVE CHECKED ONLINE AND REALIZED THAT IT SEEMS TO BE A COMMON ENOUGH COMPLAINT BY OTHER OWNERS. ON HARD STOPS THE PUSH BACK BY THE PEDAL IS HARD ENOUGH THAT THE BRAKES LOCKUP INTERMITTENTLY. THIS IS DIFFERENT FROM THE PULSING FEEL OF THE ANTI-LOCK SYSTEM. IT FEELS AS THOUGH THE ROTORS ARE WARPED. IT IS FELT IN THE STEERING WHEEL ALSO, AND INCREASINGLY IN THE VEHICLE IN NORMAL DRIVING WITHOUT APPLYING THE BRAKES. IT IS NOT THE TIRES WHICH ARE FASTIDIOUSLY KEPT NEW OMI. NO INCIDENT YET BUT I BELIEVE THERE IS…
Owner-reported narrative. Look up ODI 10325016 at NHTSA ↗
Owner report 10343023 · 2010-07-13 (July 13, 2010)
TL* THE CONTACT OWNS A 2003 INFINITI QX4. THE CONTACT STATED WHILE ATTEMPTING A TURN AT 20 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE CONTACT EXITED THE VEHICLE AND FOUND THE REAR AXLE WAS EXTENDED THREE FEET FROM THE VEHICLE. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER. THE DEALER ADVISED THERE WAS NOT A RECALL FOR THE FAILURE AND ANY REPAIRS WOULD BE AT HIS EXPENSE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE AND CURRENT MILEAGES WERE 74,000.
Owner-reported narrative. 74,000 miles reported. Look up ODI 10343023 at NHTSA ↗
Owner report 10662039 · 2014-12-03 (December 3, 2014)
FUEL FILLER NECK HAS CORRODED CAUSING GAS TO LEAK ON TO TIRE AND BRAKES WHILE FILLING GAS TANK. RECALL OF PREVIOUS MODEL. *JS
Owner-reported narrative. 95,000 miles reported. Look up ODI 10662039 at NHTSA ↗