Infiniti QX4 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your Infiniti QX4

Select your Infiniti QX4's year to get more detailed information:

Infiniti QX4 Problems

Check Engine Light Due to Failed Rear Oxygen Sensor

The rear oxygen sensor may fail resulting in illumination of the Check Engine Light. Our technicians recommend to ensure the latest software is installed in the powertrain control module (PCM) along with replacing the failed O2 sensor.

Erratic Idle Speed and Increased Accelerator Pedal Effort

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.

Front Catalytic Converters are Prone to Cracking

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.

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Infiniti QX4 Questions

HOW DO MY DOME LIGHTS COME ON AUTOMATICALLY WHEN DOORS ARE OPEN? (1 answer)

mY DOME LIGHTS WILL NOT COME ON AUTOMATICALLY.

The car body rolls, rocks from left to right at some speeds (2 answers)

when accelerating from 50 mph to 70 mph the body rocks sideways, from right to left.

Blower motors aren't coming on ....trying to self service the AC with freon HELP (2 answers)

Why doesn't my heater/AC work?....Blower motors aren't switching on, and I checked most of my fuses and relays pertaining to the
Coinciding parts.....I can hear AC clutch click on and off but no air blowing into dash vents .any potential troubleshooting solutions anyone?

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Infiniti QX4 Recalls

Front Airbag Inflator Module

This limited regional recall is for vehicles currently registered or first sold in Florida, Puerto Rico, Hawaii and the U.S. Virgin Islands, and equipped with Takata-brand air bag inflators. Upon deployment the driver and/or passenger airbag inflator could rupture, increasing the risk of personal injury. Honda dealers will replace the affected airbag inflator modules to correct this concern.

Injury Due to Airbag Deployment

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.

Rust May Form on the Strut Tower Housing

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 Reviews

I bought my 2003 Infiniti QX4 used, but it was well maintained, and I kept it that way with regular service. It was almost at 221,000 miles (it drove beautifully, with no problems at all). I was hoping to keep it forever (even as a weekend car), but I was hit by another car in an accident and totalled it out. I actually cried, because I drove this vehicle 50 plus miles every day to work, and en...
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?

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