2004 INFINITI FX45

2004 INFINITI FX45

Overview

The 2004 INFINITI FX45, a luxury performance SUV, is generally known for its robust build and engaging driving experience. Powered by a potent V8 engine, it offers strong acceleration and a refined ride. While it excels in performance and comfort, like any vehicle of its age, certain components may experience wear or require attention. This analysis focuses on documented technical reliability concerns beyond routine maintenance, providing insights into potential areas of focus for owners and prospective buyers of this distinctive SUV.

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Engine

4.5L V8 (VK45DE)

Oil Leaks

• Symptoms: Visible oil stains under the vehicle, burning oil smell, low oil level.
• Solution: Replacement of leaking gaskets (e.g., valve cover, oil pan).
• Cost: $300 - $700

Timing Chain Wear

• Symptoms: Rattling noise from the front of the engine, especially on startup; check engine light.
• Solution: Replacement of timing chain, tensioners, and guides.
• Cost: $1200 - $2500

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Slipping

• Symptoms: Delayed engagement, rough gear changes, slipping between gears.
• Solution: Transmission fluid and filter change; potential rebuild or replacement if internal damage is present.
• Cost: $400 - $800 (fluid service); $2000 - $4000 (rebuild/replacement)

Suspension

Standard Chassis

Worn Control Arm Bushings

• Symptoms: Clunking noises over bumps, vague steering feel, uneven tire wear.
• Solution: Replacement of control arm bushings or the entire control arm assembly.
• Cost: $400 - $800

Leaking Shock Absorbers/Struts

• Symptoms: Bouncy ride, visible fluid leaks on shock bodies, reduced handling.
• Solution: Replacement of worn shock absorbers or struts.
• Cost: $500 - $1000

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

• Symptoms: Malfunctioning power windows, door locks, interior lights, or dashboard warning lights.
• Solution: Diagnosis and potential reprogramming or replacement of the BCM.
• Cost: $600 - $1200

Alternator

Failure

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

Exterior

Body Panels & Trim

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: N/A
• Cost: N/A

Interior

Infotainment System

Navigation System Glitches

• Symptoms: Screen freezing, inaccurate GPS location, system unresponsiveness.
• Solution: Software update or replacement of the navigation unit.
• Cost: $500 - $1500

Climate Control

Blend Door Actuator Failure

• Symptoms: Inability to control temperature or airflow direction.
• Solution: Replacement of the blend door actuator(s).
• Cost: $300 - $600

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Summary Verdict

The 2004 INFINITI FX45 offers a compelling blend of performance and luxury. While its V8 engine and sophisticated drivetrain are generally reliable, owners should be aware of potential issues such as oil leaks and timing chain wear. The transmission can sometimes exhibit shifting problems, and suspension components like control arm bushings and shocks may require attention due to age and mileage. Electrical gremlins, particularly related to the BCM, and alternator failures are also noted. Interior climate control actuators and navigation system glitches can occur. Despite these potential concerns, with diligent maintenance and addressing issues promptly, the FX45 can remain a capable and enjoyable vehicle.