1991 INFINITI Q45

Introduction

The 1991 INFINITI Q45 is a luxury sedan powered by a 4.5L V8 engine that produces 278 horsepower and 292 lb-ft of torque. It is paired with a 4-speed automatic transmission. The Q45 is known for its spacious cabin, comfortable ride, and powerful engine. However, it also has some reported issues.

Engine

4.5L V8

• Intake Manifold Gasket Failure: Cracks in the intake manifold gasket can cause coolant and oil to leak, leading to engine overheating and performance issues.
  • Solution: Replace intake manifold gaskets and clean affected components.
  • Estimated Cost to Fix: $500 - $800+
  • Recalls: None Found
• Timing Belt Failure: The timing belt is a critical component that synchronizes the movement of the camshaft and crankshaft. Failure of the timing belt can result in catastrophic engine damage.
  • Solution: Replace timing belt and water pump (recommended).
  • Estimated Cost to Fix: $800 - $1200+
  • Recalls: None Found

Transmission

4-Speed Automatic

• Harsh Shifting: Rough or delayed shifting can be caused by worn or damaged shift solenoids or internal transmission components.
  • Solution: Inspect and replace affected components, such as shift solenoids or transmission clutches.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found
• Transmission Slipping: If the transmission fails to engage properly or slips between gears, it may indicate worn clutch packs or torque converter issues.
  • Solution: Overhaul or replace transmission.
  • Estimated Cost to Fix: $1500 - $3000+
  • Recalls: None Found

Suspension

• Strut Wear: Worn struts can lead to a rough and unstable ride, reduced handling, and uneven tire wear.
  • Solution: Replace struts and perform wheel alignment.
  • Estimated Cost to Fix: $300 - $500+ per axle
  • Recalls: None Found
• Control Arm Bushing Failure: Worn or damaged control arm bushings can cause clunking noises, misalignment, and premature tire wear.
  • Solution: Replace control arm bushings.
  • Estimated Cost to Fix: $200 - $300+ per side
  • Recalls: None Found

Electrical

• Alternator Failure: A malfunctioning alternator can affect charging and electrical systems, leading to dim lights, battery drain, and electrical component failure.
  • Solution: Replace alternator and test charging system.
  • Estimated Cost to Fix: $300 - $500+
  • Recalls: None Found
• Ignition Coil Failure: Faulty ignition coils can cause misfiring, reduced power, and rough running.
  • Solution: Replace ignition coils and spark plugs.
  • Estimated Cost to Fix: $150 - $300+ per coil
  • Recalls: None Found

Exterior

• Rust and Corrosion: The undercarriage, wheel arches, and exhaust system may be susceptible to rust and corrosion over time.
  • Solution: Rust prevention treatments and repairs as needed.
  • Estimated Cost to Fix: Varies widely depending on severity and location.
  • Recalls: None Found

Interior

• Climate Control Malfunction: The climate control system may experience issues with temperature regulation, fan operation, or refrigerant leaks.
  • Solution: Inspect and repair or replace faulty components, such as temperature sensors, actuators, or refrigerant lines.
  • Estimated Cost to Fix: $300 - $1000+
  • Recalls: None Found
• Dashboard Trim Peeling: The dashboard trim may peel or become loose, affecting aesthetics and potentially causing glare.
  • Solution: Replace or repair peeling trim.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found

Summary

Overall, the 1991 INFINITI Q45 has some commonly reported issues that can affect its performance, reliability, and overall ownership experience. While the severity and cost of repairs can vary, the most common issues involve the engine, transmission, suspension, and electrical system. Regular maintenance and prompt repairs can help mitigate potential problems and extend the life of the vehicle.