2001 INFINITI Q45

The 2001 INFINITI Q45 is a luxury sedan known for its comfortable ride and powerful engine. It came equipped with a 4.1-liter V8 engine that produced 266 horsepower and 278 lb-ft of torque paired with a 4-speed automatic transmission. Drivers often appreciated the smooth ride and spacious interior of the Q45, but some criticized its bland styling and less engaging driving experience compared to European competitors.

Engine

4.1L V8 (VH41DE)

• Timing Chain Tensioner Failure
  • Description/Symptoms: Rattling noise upon startup, especially in colder weather. The timing chain tensioner weakens or fails, causing the chain to slap against the guides. This can lead to eventual engine damage if not addressed.
  • Solution: Replace the timing chain tensioner and potentially the timing chain and guides.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil leaks from various locations, including valve cover gaskets, front crankshaft seal, and rear main seal. Visible oil spots under the car.
  • Solution: Replace the leaking gaskets and seals.
  • Estimated Cost to Fix: $150 - $500+ per leak location
  • Recalls: None Found

Transmission

4-Speed Automatic

• Slipping/Harsh Shifting
  • Description/Symptoms: The transmission may slip between gears, especially during acceleration. Shifts may be harsh or delayed.
  • Solution: Perform a transmission flush and replace the transmission fluid. If the problem persists, the transmission may need to be rebuilt or replaced.
  • Estimated Cost to Fix: $150 - $300 for a fluid flush; $2500 - $4500 for a rebuild or replacement
  • Recalls: None Found

Suspension

• Air Suspension Failure (if equipped)
  • Description/Symptoms: Sagging suspension, uneven ride height, air compressor running constantly or not at all. The air struts can leak or the air compressor can fail.
  • Solution: Replace the faulty air struts or the air compressor. Some owners convert to traditional coil springs for a more reliable and cost-effective solution.
  • Estimated Cost to Fix: $500 - $1500+ per strut; $300 - $800+ for the compressor; $800-$1200+ for coil spring conversion
  • Recalls: None Found
• Control Arm Bushing Wear
  • Description/Symptoms: Clunking or rattling noise from the front or rear suspension, especially over bumps. Worn control arm bushings allow excessive movement in the suspension.
  • Solution: Replace the worn control arm bushings or the entire control arm.
  • Estimated Cost to Fix: $200 - $500+ per control arm
  • Recalls: None Found

Electrical

• Instrument Cluster Issues
  • Description/Symptoms: Intermittent or complete failure of the instrument cluster. Gauges may stop working, lights may flicker, or the entire cluster may go blank.
  • Solution: Repair or replace the instrument cluster.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found
• Power Window/Door Lock Issues
  • Description/Symptoms: Power windows may fail to operate, or power door locks may malfunction.
  • Solution: Replace the faulty window regulator, motor, or door lock actuator.
  • Estimated Cost to Fix: $200 - $500+ per window/door
  • Recalls: None Found

Exterior

• Antenna Motor Failure
  • Description/Symptoms: The power antenna fails to retract or extend properly, or the motor makes a grinding noise.
  • Solution: Replace the antenna motor or the entire antenna assembly.
  • Estimated Cost to Fix: $150 - $400+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof may be slow, noisy, or fail to open or close properly. The sunroof motor or mechanism may be worn or damaged.
  • Solution: Repair or replace the sunroof motor or mechanism.
  • Estimated Cost to Fix: $200 - $600+
  • Recalls: None Found

Summary

The 2001 INFINITI Q45 can be a comfortable and luxurious vehicle, but potential buyers should be aware of several common issues. Engine problems like timing chain tensioner failure and oil leaks can be costly to repair. Transmission issues, especially slipping, are also a concern. Suspension problems, particularly with the air suspension (if equipped), can lead to expensive repairs. Electrical issues like instrument cluster failure can also occur. Overall, the severity of these issues ranges from moderate to severe, and the cost of repairs can be significant, especially if multiple problems arise. Pre-purchase inspections are highly recommended.