2000 INFINITI QX4

The 2000 INFINITI QX4 is a luxury SUV based on the Nissan Pathfinder. It offers a comfortable ride, decent off-road capability, and a well-appointed interior for its time. The sole engine option for the 2000 QX4 is a 3.3L VG33E V6 engine producing approximately 170 horsepower and 200 lb-ft of torque, paired with a 4-speed automatic transmission. Owners often praise the QX4 for its reliability, ruggedness, and simple operation. Common complaints include relatively poor fuel economy compared to newer SUVs, outdated technology, and some age-related maintenance issues.

Engine

3.3L VG33E V6

• Distributor Failure
  • Description/Symptoms: Engine misfires, rough running, stalling, and a check engine light with codes related to distributor issues. Symptoms may worsen in wet conditions.
  • Solution: Replace the distributor with a new or remanufactured unit.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Knock Sensor Failure
  • Description/Symptoms: Reduced engine performance, poor fuel economy, and a check engine light. The knock sensor is designed to detect engine knocking or detonation.
  • Solution: Replace the faulty knock sensor. This usually requires intake manifold removal, so it’s a labor-intensive job.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found
• Vacuum Leaks
  • Description/Symptoms: Rough idling, hissing noises from the engine bay, poor fuel economy, and potential check engine light.
  • Solution: Locate and repair or replace the leaking vacuum hoses. Smoke testing can help identify the leaks.
  • Estimated Cost to Fix: $100 - $300+
  • Recalls: None Found

Transmission

4-Speed Automatic

• Shifting Issues
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, or failure to shift at all. This can be caused by low transmission fluid, worn-out clutches, or valve body issues.
  • Solution: Begin by checking and replacing transmission fluid. If the issue continues, further diagnostics may be needed and a transmission rebuild or replacement may be necessary.
  • Estimated Cost to Fix: $150 (fluid change) - $2,000+ (rebuild/replacement)
  • Recalls: None Found

Suspension

• Front Strut/Shock Absorber Failure
  • Description/Symptoms: Bouncy ride, poor handling, excessive body roll, and clunking noises from the front suspension.
  • Solution: Replace the worn-out front struts. It is generally recommended to replace them in pairs.
  • Estimated Cost to Fix: $300 - $800+ (pair)
  • Recalls: None Found
• Rear Suspension Sag
  • Description/Symptoms: Rear of the vehicle sits lower than normal, especially when loaded. Can lead to a rougher ride and reduced handling.
  • Solution: Replace the rear coil springs or consider adding air springs for load leveling.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found
• Idler Arm/Pitman Arm Wear
  • Description/Symptoms: Loose steering, wandering on the road, and uneven tire wear. These components are part of the steering linkage.
  • Solution: Replace the worn idler arm and/or pitman arm. An alignment is recommended after replacement.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Electrical

• Power Window Issues
  • Description/Symptoms: Windows operate slowly or fail to operate at all. Often caused by worn window motors or faulty window regulators.
  • Solution: Replace the faulty window motor or regulator.
  • Estimated Cost to Fix: $150 - $400+ per window
  • Recalls: None Found
• Alternator Failure
  • Description/Symptoms: Battery warning light, dimming headlights, difficulty starting, and eventual battery drain.
  • Solution: Replace the failing alternator.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust developing on the undercarriage, rocker panels, and around wheel wells.
  • Solution: Repair or replace rusted panels. Prevention through rust proofing will help.
  • Estimated Cost to Fix: Varies greatly depending on the extent of the rust.

Interior

• Climate Control Issues
  • Description/Symptoms: Failure of the air conditioning or heating system. Could be due to a refrigerant leak, compressor failure, or a malfunctioning blend door actuator.
  • Solution: Diagnose the specific issue and replace the faulty component (compressor, blend door actuator, etc.).
  • Estimated Cost to Fix: $100 - $1,000+
  • Recalls: None Found
• Sunroof Problems
  • Description/Symptoms: Sunroof not opening or closing properly, getting stuck, or leaking. Can be caused by a faulty motor, damaged tracks, or clogged drain lines.
  • Solution: Repair or replace the sunroof motor, clean and lubricate the tracks, and clear the drain lines.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary

The 2000 INFINITI QX4, while generally reliable, is prone to certain age-related issues. The most common problems revolve around engine components like the distributor and knock sensor, along with suspension wear and electrical issues. The severity of these problems ranges from minor inconveniences to more serious mechanical failures. The cost to repair can vary greatly depending on the issue and the chosen repair shop, but owners should budget for potential repairs related to these common problems, given the vehicle’s age. Overall, while a well-maintained QX4 can still be a good vehicle, potential buyers should be aware of these potential issues and factor them into their purchasing decision.