1999 Infiniti QX4 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 Infiniti QX4
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1999 Infiniti QX4 ProblemsErratic 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.
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.
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.
1999 Infiniti QX4 QuestionsThe 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.
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?
I have a salvaged 1999 or 2000 QX4...it is registered,and legal, been a good truck, but the AC has never worked. I bought Freon to service myself, but then discover the blower motors not coming on at all....I checked all relays and fuses, what next?
1999 Infiniti QX4 RecallsRust 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.