2000 INFINITI QX4

2000 INFINITI QX4

Overview

The 2000 Infiniti QX4, a luxury SUV based on the Nissan Pathfinder platform, aimed to blend off-road capability with premium comfort. It was generally well-regarded for its robust powertrain and comfortable ride. However, like many vehicles of its era, it has specific areas where owners have reported issues over time. This analysis focuses on common mechanical and electrical concerns, excluding routine maintenance, to provide a clearer picture of its long-term reliability.

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Engine

3.3L V6 VG33ER

Intake Manifold Gasket Leaks

• Symptoms: Coolant leaks, engine misfires, rough idle, overheating.
• Solution: Replacement of intake manifold gaskets.
• Cost: $300 - $600

Timing Belt Failure

• Symptoms: Sudden engine stoppage, no start, potential internal engine damage (bent valves, damaged pistons).
• Solution: Replacement of timing belt, tensioner, and idler pulleys. If damage occurred, engine repair or replacement may be necessary.
• Cost: $600 - $1000 (belt service only); $2000+ (if engine damage)

Transmission

4-Speed Automatic (RE4R01A)

Transmission Slipping/Harsh Shifting

• Symptoms: Delayed engagement, slipping between gears, harsh shifts, potential failure to move.
• Solution: Transmission fluid and filter change, solenoid replacement, or full transmission rebuild/replacement.
• Cost: $400 - $800 (fluid/filter/solenoid); $2000 - $4000 (rebuild/replacement)

Suspension

Independent Front Suspension / Solid Rear Axle

Worn Ball Joints and Tie Rod Ends

• Symptoms: Clunking noises over bumps, steering wander, uneven tire wear, loose steering feel.
• Solution: Replacement of worn ball joints and tie rod ends.
• Cost: $400 - $700

Leaking Struts/Shocks

• Symptoms: Bouncy ride, excessive body roll, visible fluid leaks on shock/strut bodies.
• Solution: Replacement of struts or shocks.
• Cost: $300 - $600

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

• Symptoms: Power window malfunctions, door lock issues, interior light problems, dashboard warning lights.
• Solution: Diagnosis and potential reprogramming or replacement of the BCM.
• Cost: $500 - $1000

Alternator

Alternator Failure

• Symptoms: Dimming headlights, battery warning light, dead battery, electrical system malfunctions.
• Solution: Replacement of the alternator.
• Cost: $400 - $700

Exterior

Body and Paint

Clear Coat Peeling

• Symptoms: Fading paint, peeling clear coat, especially on horizontal surfaces and roof.
• Solution: Repainting affected areas or full vehicle repaint.
• Cost: $500 - $3000+ (depending on extent)

Sunroof

Sunroof Drain Clogs

• Symptoms: Water leaks into the cabin, musty smell, potential damage to interior components.
• Solution: Clearing of sunroof drain tubes.
• Cost: $100 - $250

Interior

HVAC System

Blower Motor Resistor Failure

• Symptoms: HVAC fan only works on highest setting, or not at all.
• Solution: Replacement of the blower motor resistor.
• Cost: $150 - $300

Seat Upholstery

Wear and Tear on Leather

• Symptoms: Cracking, tearing, or discoloration of leather seats, particularly on driver’s seat bolsters.
• Solution: Leather repair kits or professional reupholstery.
• Cost: $100 - $500 (DIY kits); $500 - $2000+ (professional)

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Summary Verdict

The 2000 Infiniti QX4 is a capable luxury SUV with a generally solid mechanical foundation. The 3.3L V6 engine is robust but can suffer from intake manifold gasket leaks and requires timely timing belt replacements to avoid catastrophic failure. The automatic transmission is generally reliable but can develop slipping issues over time. Common wear items include suspension components like ball joints and tie rods, as well as struts. Electrical issues, particularly with the BCM and alternator, can arise. Exterior paint can show age with clear coat peeling, and interior wear on leather is typical. Overall, with diligent maintenance and addressing known issues, the QX4 can remain a dependable vehicle.