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Resources for the Repair and Maintenance of your Infiniti QX4

Infiniti QX4 Models:

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Infiniti QX4 Problems

Exhaust & Emissions -- Verified

Failure of the EVAP System charcoal canister may allow charcoal debris to infiltrate the EVAP system causing other failures. Cleaning the vapor lines to ensure the system is clear of debris is important when repairing EVAP system failures.

Engine -- Verified

Carbon deposits on the throttle body may cause any of the following issues: Idle speed fluctuation, incorrect idle speed, difficulty accelerating way from a stop, and or increased accelerator pedal resistance. Our technicians tell us a revised throttle body and associated parts are available to resolve this issue.

Exhaust & Emissions -- Verified

The Check Engine Light may illuminate with code P0138, P0140, P0158, and/or P0160 stored. Our technicians recommend replacing the rear oxygen sensor, and reprogramming the vehicle's powertrain control module (PCM) with upgraded software to correct this concern.

Heating & Air Conditioning -- Verified

The heater blower motor may only work on the high speed setting. Our technicians recommend replacing the heater blower motor and fan control amplifier to address this problem.

Exhaust & Emissions -- Verified

The mass airflow sensor may fail resulting in a loss of power and/or Check Engine Light illumination with code P0171 and/or P0174 stored. Our technicians recommend replacing the failed airflow sensor to correct this concern.

Infiniti QX4 Recalls (Recent)

Body, Interior & Misc., August 19, 2010

Summary: NISSAN IS RECALLING FORTY-SIX CERTAIN MODEL YEAR 2002 PATHFINDER AND INFINITI QX4 VEHICLES MANUFACTURED FROM AUGUST 24, 2001 THROUGH AUGUST 28, 2001. THE AIR BAG INFLATOR CONTAINS PROPELLANT WAFERS THAT ARE REQUIRED TO PROPERLY DEPLOY THE FRONT PASSENGER AIR BAG. DUE TO IMPROPER PROPELLANT WAFER INSTALLATION DURING THE AIR BAG INFLATOR ASSEMBLY PROCESS, SOME AIR BAG INFLATORS MAY BE MISSING ONE OF THE WAFERS. AS A RESULT, THE REMAINING WAFERS IN THE INFLATOR USED FOR THE DEPLOYMENT OF THE FRONT PASSENGER AIR BAG MAY, OVER TIME, BREAK UP INTO POWDER DUE TO NORMAL VIBRATION EXPERIENCED WHILE DRIVING. THIS CAUSES THE COMBUSTION RATE OF THE PROPELLANT TO INCREASE INSIDE THE INFLATOR, WHICH CAN LEAD TO INTERNAL PRESSURE RISING SUDDENLY DURING AIR BAG DEPLOYMENT.

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Body, Interior & Misc., September 24, 2001

Summary: VEHICLE DESCRIPTION: SPORT UTILITY VEHICLES. SOME OF THE BRACKETS USED TO ATTACH THE TWO GAS STRUTS TO THE REAR DOOR (HATCH) MAY HAVE BEEN IMPROPERLY MADE. AT HIGH AMBIENT TEMPERATURES, THE INCREASE IN GAS PRESSURE IN THE STRUT(S) COULD CAUSE ONE OR BOTH BRACKETS TO BEND, RESULTING IN THE STRUTS DETACHING FROM THE BRACKET(S) WHEN OPENING OR CLOSING THE REAR DOOR.

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Electrical & Lights, December 22, 2000

Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES MAY HAVE AN IGNITION LOCK ASSEMBLY WITH IMPROPERLY SEATED KEY CYLINDER CAP CONNECTOR PINS. VIBRATION CAN CAUSE THE CONNECTING PINS TO LOOSEN AND/OR FALL OUT ALLOWING THE KEY CYLINDER CAP TO DISENGAGE FROM THE KEY CYLINDER.

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Engine, November 26, 2007

Summary: ON CERTAIN VEHICLES ORIGINALLY SOLD IN OR CURRENTLY REGISTERED IN THE STATES OF CONNECTICUT, DELAWARE, IOWA, ILLINOIS, INDIANA, KENTUCKY, MASSACHUSETTS, MAINE, MARYLAND, MICHIGAN, MINNESOTA, NEW HAMPSHIRE, NEW JERSEY, NEW YORK, OHIO, PENNSYLVANIA, RHODE ISLAND, TENNESSEE, VERMONT, VIRGINIA, WEST VIRGINIA , WISCONSIN AND THE DISTRICT OF COLUMBIA, DURING THE COATING PROCESS OF THE FUEL FILLER TUBE ASSEMBLY, AN INSUFFICIENT AMOUNT OF COATING MAY HAVE BEEN APPLIED AT THE LOWER MOUNTING BRACKET. THIS COULD RESULT IN AN OPENING IN THE COATING WHICH CAN ALLOW WATER TO ENTER AND MAKE CONTACT WITH THE BARE METAL OF THE TUBE.

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Suspension & Steering, April 20, 2011

RepairPal Expert Overview:

In areas where winter road salt is used, a mixture of snow/water and salt may enter an assembly location hole in the upper strut housing. This corrosive mixture can collect on the mating surface of the strut housing panel and the inner hood ledge assembly; over time, this can cause rusting of the strut tower housing. The rust can weaken the housing, causing it to crack and pull away from the inner hood ledge assembly. This can lead to grinding noises and increased steering effort, which, if severe enough, can cause the steering column to break. This would result in a loss of steering control, increasing the risk of a crash. Dealers will inspect the strut housing and repair the vehicles as necessary. An interim notification letter should be mailed to owners prior to May 16, 2011.

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Infiniti QX4 Questions and Answers

Dr Bill, 1997 Infiniti QX4, 3.3L V6, Del Mar, CA

what is the estimated cost for replacing a fuel pump

Trini S, 1997 Infiniti QX4, 3.3L V6, Whittier, CA

1997 QX4 Infiniti SUV. Cause I have to put in a part and I need to know how it goes. I'm trying not to pay for it to be put in...It seems easy just don't know how it goes. Can you pls tel...

rodpunzalan, 1997 Infiniti QX4, 3.3L V6, Citrus Heights, CA

My headlights has no dim but bright is working perfectly fine

radcliffe, 1997 Infiniti QX4, 3.3L V6, Arlington, WA

I have never had this problem getting the shifter out of park. My foot is on the brake I've tried moving it around every which way. Is this a major problem or just something minor.

Infiniti_QX4, 1997 Infiniti QX4, 3.3L V6, Tulsa, OK

How much will it cost me in parts and labor to install control arms?

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Infiniti QX4 Reviews

I love my infiniti qx4 2002. This is my second one!
It is quite expensive to maintain but it's worth the expense.
Presently it's been diagnosed with po420 catalytic converter problem....my heart is sad....but still love my baby.
Wish they did not discontinue the model.
It is a very durable vehicle. I once saw 450,000 mileage accrued from QX4 4WD. It was still running, I fell in love....

My QX4 Infinity has been giving me nothing but problem it's a 2001 the code pc160/code 300 multipy misfire 02 sensor / right cataylac converter.is this car worth the cost of repair?

The problems began in early 2012, when we signed up for a new “Express Service and Oil Change” program at our local dealer. We thought that this new offering, given that it allowed us to obtain service without an appointment, would make life easier. Instead, it has caused us untold hours of lost time, and consistent struggles to get Infiniti to deliver the level of service we had come to expect.

Despite multiple attempts over the course of a whole year to have the service department address problems with alarming swaying of my car at highway speeds, Infiniti repeatedly claimed nothing was wrong with my car…until they recently determined that both of my rear upper links and the driver side rear lower link (bushings) were completely worn out and needed total replacement!
• I learned that several service technicians assigned to me during this period, who claimed nothing was wrong with the car, were later fired: a telling revelation that did nothing to diminish the dangerous situation in which Infiniti placed me and my family.
• Technicians told me during my last visit that my power steering fluid was “dirty/degraded”, my coolant was “diluted”, and my brake fluid and automatic transmission fluid were also “dirty/degraded”. I subsequently discovered that these were fictitious fabrications, revealing an astonishing pattern of dishonest “upselling”, and oversight of issues that DID require attention.
• I have had to have my CD-player replaced twice (under warranty) by Infiniti, because faulty refurbished units were installed. The last unit installed was also faulty, but Miller Infiniti refuses to replace unless I pay through the nose, now that I am conveniently out of warranty (by a matter of months).

The hours I have had to spend at Infiniti over the past year, vainly trying to get the type of service Infiniti customers should receive without a second thought, have been taxing. The evasive dishonesty has been shocking, the underhanded fabrications disheartening, and the stonewalling infuriating. When I wrote to corporate, the President of the company expressed encouraging concern, but then passed the matter on to his head of US operations, who was so condescending that it was obvious one little customer's problems with their QX4 was not his problem. We had the issues repaired, at great expensive, by a trustworthy 3rd party mechanic, and have since purchased 2 vehicles: A Lexus RX350, and a BMW X5. Never again will we purchase an Infiniti.

idol is low.install a new throttle sensor and is the same. is there a way to install. joe t

I have had this car for 12 years. It has 267,000 miles and I just started to have problems with it. Nothing major that would have gone out on most cars with half those miles. Great car and the mechanics that have worked on them say it is one of the best cars made.

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