2004 INFINITI Q45
2004 INFINITI Q45
Overview
The 2004 INFINITI Q45, a luxury sedan, generally presents a solid reliability record for its era. While no vehicle is entirely without potential issues, the Q45 is known for its robust powertrain and comfortable ride. Owners often praise its smooth performance and upscale interior. However, as with any luxury vehicle of this age, attention to maintenance is key. Potential areas to monitor include certain electronic components and the suspension system, though widespread critical failures are not commonly reported. Overall, the Q45 offers a compelling blend of performance and luxury, with a reliability profile that, with proper care, can be quite dependable.
Engine
4.5L V8 (VK45DE)
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: N/A
Transmission
5-Speed Automatic (RE5R05A)
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: N/A
Suspension
Standard Chassis
Front Suspension Bushings
- Symptoms: Clunking noises over bumps, uneven tire wear, vague steering feel.
- Solution: Replacement of worn bushings.
- Cost: $300 - $700
Rear Air Suspension (if equipped)
- Symptoms: Vehicle sagging, loss of ride height, compressor failure, air leaks.
- Solution: Repair or replacement of air springs, compressor, or lines.
- Cost: $500 - $1500+
Electrical
Body Control Module (BCM)
Intermittent Electrical Gremlins
- Symptoms: Malfunctioning power windows, door locks, interior lights, or dashboard warnings.
- Solution: Diagnosis and potential reprogramming or replacement of the BCM.
- Cost: $500 - $1200
Infotainment System
Navigation System Issues
- Symptoms: Screen freezing, unresponsiveness, inaccurate GPS.
- Solution: Software update or replacement of the navigation unit.
- Cost: $400 - $1000
Exterior
Standard Body
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: N/A
Interior
Standard Interior
Headliner Sagging
- Symptoms: Fabric detaching from the headliner board.
- Solution: Re-gluing or replacement of the headliner.
- Cost: $200 - $500
Summary Verdict
The 2004 INFINITI Q45 is a generally reliable luxury sedan, particularly concerning its powerful V8 engine and smooth 5-speed automatic transmission, which show no widespread common failures. The primary areas that may require attention are the suspension, with potential issues in bushings and the air suspension system (if equipped), and certain electrical components like the Body Control Module and infotainment system, which can exhibit intermittent problems. Interior wear, such as headliner sagging, is also a possibility given the vehicle’s age. With diligent maintenance and prompt attention to any developing issues, the Q45 can remain a dependable and enjoyable vehicle.