2006 INFINITI FX45

2006 INFINITI FX45

Overview

The 2006 INFINITI FX45, a luxury performance SUV, is generally considered a robust vehicle, particularly for its era. It offers a blend of power and premium features. While most owners report a positive ownership experience, like any vehicle, it has specific areas that have seen more attention from mechanics and owners. The powerful V8 engine and sophisticated drivetrain are highlights, but understanding potential weak points can aid in proactive maintenance and ensure continued reliability. This analysis focuses on documented common issues beyond routine maintenance, providing insights into specific components and their potential problems.

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Engine

4.5L V8 (VK45DE)

Oil Leaks (Valve Covers, Oil Pan)

• Symptoms: Visible oil under the vehicle, burning oil smell, low oil level.
• Solution: Replacement of gaskets and seals.
• Cost: $300 - $700

Timing Chain Tensioner Wear

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

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Delayed Engagement

• Symptoms: Jerky shifts, difficulty engaging gears, slipping.
• Solution: Transmission fluid and filter change, solenoid replacement, or full transmission rebuild.
• Cost: $400 - $3000+

Suspension

Standard Chassis

Front Suspension Bushing Wear

• Symptoms: Clunking noises over bumps, vague steering feel, uneven tire wear.
• Solution: Replacement of worn control arm bushings.
• Cost: $300 - $600

Rear Air Suspension Failure (if equipped)

• Symptoms: Vehicle sagging in the rear, compressor running constantly, error messages.
• Solution: Replacement of air springs, compressor, or related lines.
• Cost: $800 - $1500

Electrical

Body Control Module (BCM) Issues

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

Alternator Failure

Battery Warning Light / Dead Battery

• Symptoms: Battery warning light illuminated, dimming headlights, eventual battery drain.
• Solution: Replacement of the alternator.
• Cost: $400 - $700

Exterior

Standard Body

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: No widespread issues reported.

Interior

Standard Cabin

HVAC Blower Motor Resistor Failure

• Symptoms: Fan only works on highest setting or not at all.
• Solution: Replacement of the blower motor resistor.
• Cost: $100 - $250

Sunroof Drain Clogs

• Symptoms: Water leaks into the cabin, musty smell, potential headliner damage.
• Solution: Clearing of sunroof drain tubes.
• Cost: $100 - $200

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Summary Verdict

The 2006 INFINITI FX45 is a capable luxury SUV with a powerful engine and engaging driving dynamics. While it doesn’t suffer from widespread critical failures, potential owners should be aware of common issues such as oil leaks from the engine, potential wear on timing chain components, and transmission concerns like harsh shifting. Suspension components, particularly bushings and the rear air suspension (if equipped), can also require attention. Electrical gremlins related to the BCM and occasional alternator failures are noted. Interior issues are generally minor, like HVAC resistor problems. With diligent maintenance and addressing these specific potential issues, the FX45 can remain a reliable and enjoyable vehicle.