Q50 (V35)
Engine Reliability Ratings
Infiniti Q50 Unidentified Engine
View details
Complaint Breakdown
Known Issues
VQ35DE
3.5L 6-cylView details
Complaint Breakdown
Known Issues
Show 1 additional engine variant with limited data
3.7-V6-Gas
3.7L 6-cylView details
Complaint Breakdown
Known Issues
Vehicle-Level Issues
These issues affect the Infiniti Q50 regardless of engine variant.
Recalls (9)
ZF SERVICE IS RECALL CERTAIN CLUTCH KIT ASSEMBLIES, PART NUMBER SX: K70358-01, SHIPPED TO WHOLESALERS AS SERVICE PARTS BETWEEN SEPTEMBER 1, 2010, AND MARCH 8, 2011. THESE SERVICE PARTS ARE INTENDED FOR USE ON MODEL YEAR 2003-2006 NISSAN 350Z AND INFINITI G35 VEHICLES. THE SX: K70358-01 CLUTCH KIT CONTAINS AN OVERSIZED CLUTCH DISC.
NISSAN IS RECALLING CERTAIN MODEL YEAR 2005 THROUGH 2007 INFINITI G35 SEDANS MANUFACTURED FROM MARCH 29, 2004 THROUGH AUGUST 25, 2006 AND INFINITI G35 COUPES MANUFACTURED FROM APRIL 1, 2004 THROUGH MAY 30, 2007. THE WIRE HARNESS CONNECTING THE BELT TENSION SENSOR (BTS) AND THE OCCUPANT DETECTION SENSOR (ODS) CONTROL UNIT UNDER THE FRONT PASSENGER SEAT CAN EXPERIENCE RELATIVE MOVEMENT WHICH CAN CAUSE WEAR AND OXIDIZATION OF THE TERMINALS AND MAY CAUSE INTERRUPTION OF THE SIGNAL.
CERTAIN AAI MOTORSPORTS COMBINATION LAMPS SOLD AS REPLACEMENT LAMPS FOR USE ON THE ABOVE LIST PASSENGER VEHICLES. COMBINATION LAMPS NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT."
CERTAIN VEHICLES FAIL TO COMPLY WITH THE "VERTICAL GRADIENT" AND "HEADLAMP PHOTOMETRIC VALUES" REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, 'LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.'
ON CERTAIN PASSENGER AND SPORT UTILITY VEHICLES, THE FUEL FILLER HOSE MAY CRACK AND RESULT IN FUEL LEAKAGE FROM THE HOSE WHILE REFUELING.
ON CERTAIN PASSENGER VEHICLES, THE CIRCUIT BOARD FOR THE CRANK POSITION SENSOR OR CAM POSITION SENSOR MAY HAVE AN IMPROPER SOLDER JOINT DUE TO SOLDER DEFORMATION CAUSED BY HEAT STRESS ACCELERATED BY THE EXISTENCE OF FLUX RESIDUE DURING THE SOLDERING PROCESS.
ON CERTAIN SEDAN AND COUPE MODEL VEHICLES, THE BRAKE STOP LAMP SWITCH MAY MALFUNCTION.
CERTAIN SEDANS FAIL TO COMPLY WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT." IN THE ASSEMBLY OF THE HEADLAMPS, IT IS NECESSARY TO HAVE A MEANS TO ADJUST THE HEADLAMPS. TAMPERPROOF CAPS TO PREVENT HORIZONTAL ADJUSTMENT OF THE HEADLAMPS ARE THEN INSTALLED. SOME OF THESE VEHICLES ARE MISSING THE TAMPERPROOF CAPS.
ON CERTAIN PASSENGER VEHICLES, THE FUEL HOSE CONNECTION FOR THE OUTLET OF THE FUEL PUMP WHICH IS LOCATED AT THE TOP OF THE FUEL TANK MAY NOT HAVE BEEN PROPERLY ATTACHED WHEN THE VEHICLE WAS ASSEMBLED AND COULD COME LOOSE WHILE DRIVING OR WHEN STARTING THE ENGINE.
All Generations
Alternatives in Compact Sedan
Frequently Asked Questions
What are the most common 2003-2006 Infiniti Q50 problems?
The 2003-2006 Infiniti Q50 has accumulated 1,133 NHTSA complaints. The most frequently reported problem areas are Electrical System, Engine, Exterior. As with any used vehicle, an inspection before buying and a vehicle history report are recommended.
Which Infiniti Q50 engine is most reliable?
The 2003-2006 Infiniti Q50 was offered with 3 engine options. Based on NHTSA complaint data, the 3.5L 6-cyl has the lowest complaint density and is considered the most reliable choice for buyers.
Is the 2003-2006 Infiniti Q50 a good used car?
The 2003-2006 Infiniti Q50 can be a sound used car depending on trim, mileage, and maintenance history. With 1,133 total NHTSA complaints on record, prospective buyers should review the known problem areas and check for open recalls before buying.
How many NHTSA complaints does the 2003-2006 Infiniti Q50 have?
The 2003-2006 Infiniti Q50 has 1,133 complaints filed with NHTSA as of our latest data pull. Complaint counts reflect owner-reported issues and do not necessarily indicate defects or safety risks on their own.
What recalls affect the 2003-2006 Infiniti Q50?
There are 9 NHTSA recalls affecting some 2003-2006 Infiniti Q50 vehicles. Recall status varies by VIN — check the NHTSA recall database at recalls.nhtsa.dot.gov with your specific VIN to confirm which campaigns apply.
What should I check before buying a used Infiniti Q50?
Before buying a used Infiniti Q50, verify all open recalls are completed via the NHTSA VIN lookup tool. Pay particular attention to Electrical System, Engine, Exterior, which are the most commonly reported problem areas. Request maintenance records, have an independent mechanic inspect the vehicle, and run a vehicle history report to check for prior accidents or title issues.
Does the Q50 have NHTSA crash test ratings?
NHTSA has not published crash test ratings for the 2003-2006 Infiniti Q50. Not all vehicles are tested each year. For the latest NHTSA safety information, visit nhtsa.gov/ratings.
Data from NHTSA federal complaints database. 1,133 complaints analyzed. Data confidence: high. Last updated: 2026-05-23.