2003 Infiniti QX4 Repair and Maintenance

A guide to problems, costs, maintenance and repair for your 2003 Infiniti QX4

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2003 Infiniti QX4 Problems

The Heater Blower Motor May Only Work on the High Speed Setting

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.

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.

Timing Chain Rattle and Tapping Noise

Rattling and tapping in the front of the engine on the 2001-2004 Infiniti QX4 is very evident, especially on cold starts. This rattling noise should not be taken lightly as it warns of upcoming timing chain failure. 

The cause of the noise is faulty timing chain guide rails and timing chain tensioners that wear out well ahead of schedule. These components are there to keep the timing chain tight and properly positioned. When these parts fail, the timing chain becomes loose, and pieces of the timing chain guides break off, falling into the oil pan. 

To remedy the situation, Nissan/Infiniti has made revised guides and tensioners, but replacement can be very costly. 

Proper oil change intervals and oil type may help slow or prevent the situation. 

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2003 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.

ac blows warm air. Blower works great. Clutch engages when ac is on. Recharged still blows warm -the pressure needle goes to red .. per instructions it may be very low in refrigerant. What did I miss? Does it need more? (2 answers)

ac turned on max and fan on max blows strong warm air.
Clutch on compressor engages.
Set V to appropriate temp, attached gage - needle went to red area. Per instructions I proceeded to recharge. Released and checked the pressure needle stayed in the red.
I do not run the ac much as I do ...

Why would the cable melt on the shift (1 answer)

The cable to where you shift the car melted what would cause that

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2003 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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2003 Infiniti QX4 Reviews

Rated
based on 1 customer 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...

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