Front catalytic converters are prone to cracking along the seams of the converter itself. Most repair shops can successfully weld the seems to prevent exhaust leakage.
Resources for the Repair and Maintenance of your 2002 Infiniti QX4
2002 Infiniti QX4
2002 Infiniti QX4 Problems
The 4WD light may flash on and off intermittently with no transfer case related fault code stored in the powertrain control module (PCM). Our technicians recommend to ensure the correct Nissan/Infinity approved fluid is present in the transfer case if this condition occurs.
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.
2002 Infiniti QX4 Recalls (Recent)
RepairPal Expert Overview:
Airbags use a chemical reaction contained in an inflator module to create the pressure necessary to inflate the bags when deployment is required. These vehicles are being recalled because the front passenger airbag inflator may produce excessive internal pressure when deployed. As a result, the inflator module could rupture, causing metal fragments to strike vehicle occupants. Dealers will inspect and replace any defective passenger front airbag inflator modules found.
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.Learn more »
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.
2002 Infiniti QX4 Questions and Answers
WHAT STEPS DO I TAKE TO REPLACE THE BRAKE LININGS?
have 2002 and 2003 QX4s. 2002 has 133,000 miles, 2003 has 85,000 miles neither auto has had timing belts replaced.
Will a warning light appear on the dashboard to tell me when
it needs to be repla...
The Check engine light comes on and when I had it checked, these are the codes that showed. Bank 1 - P0430 and Bank 2 - P0420
I heard it could mean either I have to replace the catalytic converter...
In my QX4 I have no ventilation at all. The compressor work fine but no air flow. I need to know the location of the blower and blower resistor in this car. Thanks
When should I get my timing belt replaced on my infiniti which has 92,000 miles. It runs great..
2002 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....
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 own a 2002 Infinity QX4 THAT HAS HAD TO HAVE EMMISSIONS REPAIRS. HAVE HAD TO REPLACE BOTH CATALYC CONVERTERS LEFT AND RIGHT SIDES W/O'2 SENSORS (NOT CHEAP)...REPLACED LOW BEAM BALLAST CONTROL UNIT (VERY EXPENSIVE PART AND DEALER ITEM ONLY). NOW EXPERIENCING SWAYING WHILE DRIVING ON HIGHWAY...HAVE HAD NEW TIRES INSTALLED AND WHEEL ALIGNMENT DONE...THIS CAR HAS BEEN NOTHING BUT A MONEY PIT...NOW TICKING IS GOING ON FROM THE ENGINE...PRAY AND HOPE THE ENGINE IS NOT ABOUT TO GO....I GET REGULAR SCHEDULED OIL CHANGES...
Very pleased with the QX4. Have not had any major issues. I wish the fuel economy was better though.