2002 INFINITI QX4

2002 INFINITI QX4

Overview

The 2002 INFINITI QX4, a luxury SUV based on the Nissan Pathfinder platform, offered a blend of on-road comfort and off-road capability. It was generally considered a reliable vehicle for its era, particularly praised for its robust powertrain and durable construction. However, like any vehicle, it had certain areas that could experience issues as it aged. Owners often reported satisfaction with its performance and utility, though some common age-related concerns did emerge, primarily in areas like the transmission and certain electrical components. Regular maintenance was key to ensuring its longevity.

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Engine

3.5L V6 (VQ35DE)

Timing Chain Cover Gasket Leak

• Symptoms: Oil leaks detected around the front of the engine, particularly near the timing chain cover.
• Solution: Replacement of the timing chain cover gasket.
• Cost: $300 - $600

Variable Valve Timing (VVT) Solenoid Issues

• Symptoms: Check Engine light illumination, rough idle, decreased engine performance, potential stalling.
• Solution: Replacement of the VVT solenoids.
• Cost: $200 - $500

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Slipping

• Symptoms: Delayed engagement, harsh shifts between gears, or slipping sensation during acceleration.
• Solution: Transmission fluid and filter change, solenoid replacement, or in severe cases, transmission rebuild.
• Cost: $400 - $2500+

Torque Converter Issues

• Symptoms: Shuddering at certain speeds, slipping, or unusual noises from the transmission.
• Solution: Replacement of the torque converter.
• Cost: $700 - $1500

Suspension

Standard Independent Front/Rear

Worn Ball Joints and Bushings

• Symptoms: Clunking noises over bumps, vague steering feel, uneven tire wear.
• Solution: Replacement of worn ball joints and suspension bushings.
• Cost: $300 - $700

Electrical

General Electrical System

Instrument Cluster Failures

• Symptoms: Inaccurate fuel gauge readings, non-functional gauges, or complete instrument cluster failure.
• Solution: Repair or replacement of the instrument cluster.
• Cost: $400 - $800

Window Motor Failures

• Symptoms: Power windows not operating, slow operation, or unusual noises from the door.
• Solution: Replacement of the power window motor and regulator.
• Cost: $200 - $400

Exterior

Body and Trim

Clear Coat Peeling

• Symptoms: The clear coat on the paint begins to peel or flake, especially on horizontal surfaces.
• Solution: Repainting affected areas or the entire vehicle.
• Cost: $500 - $3000+

Interior

Interior Components

HVAC Blower Motor Resistor Failure

• Symptoms: HVAC fan only works on the highest setting, or not at all.
• Solution: Replacement of the blower motor resistor.
• Cost: $100 - $250

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Summary Verdict

The 2002 INFINITI QX4 is a generally dependable luxury SUV, with its 3.5L V6 engine being a strong point. The most common concerns tend to revolve around the automatic transmission, particularly issues with harsh shifting or slipping, and some age-related electrical problems like instrument cluster malfunctions and window motor failures. Suspension components such as ball joints and bushings can also wear out over time. Exterior paint issues like clear coat peeling are not uncommon on vehicles of this age. Overall, with diligent maintenance and addressing these potential issues, the QX4 can remain a reliable vehicle.