2006 INFINITI Q45

2006 INFINITI Q45

Overview

The 2006 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 performance and refined interior. However, like many luxury vehicles of this vintage, some specific areas may require attention over time, particularly concerning electronics and certain suspension components. Regular maintenance is key to ensuring the longevity and optimal performance of this sophisticated automobile. This analysis focuses on common reported issues beyond standard wear and tear.

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Engine

4.5L V8 (VK45DE)

Timing Chain Tensioner Wear

• Symptoms: Rattling noise from the front of the engine, especially on startup; check engine light may illuminate.
• Solution: Replacement of timing chain tensioners and guides.
• Cost: $1,200 - $2,500

Oil Leaks (Valve Covers/Oil Pan)

• Symptoms: Visible oil stains under the vehicle, burning oil smell, low oil level.
• Solution: Replacement of valve cover gaskets or oil pan gasket.
• Cost: $300 - $700

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Delayed Engagement

• Symptoms: Jerky gear changes, hesitation when shifting into drive or reverse, slipping gears.
• Solution: Transmission fluid and filter service; potential valve body or solenoid replacement.
• Cost: $400 - $1,500

Suspension

Standard Chassis

Front Ball Joint Wear

• Symptoms: Clunking or knocking noises over bumps, uneven tire wear, vague steering feel.
• Solution: Replacement of worn ball joints.
• Cost: $500 - $900

Rear Air Suspension Failure (if equipped)

• Symptoms: Vehicle sagging in the rear, loss of ride height adjustment, compressor noise.
• Solution: Replacement of air springs, compressor, or related lines.
• Cost: $800 - $2,000

Electrical

Body Control Module (BCM)

Intermittent Electrical Gremlins

• Symptoms: Malfunctioning power windows, door locks, interior lights, or dashboard warning lights; CAN bus communication errors.
• Solution: Diagnosis and potential reprogramming or replacement of the BCM.
• Cost: $600 - $1,200

Instrument Cluster

Gauge Malfunctions / Dead Pixels

• Symptoms: Tachometer, speedometer, or fuel gauge not working correctly; dim or blank display segments.
• Solution: Repair or replacement of the instrument cluster.
• Cost: $500 - $1,000

Exterior

Standard Chassis

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

Seat Actuator Malfunction

• Symptoms: Power seats not moving correctly or at all.
• Solution: Replacement of faulty seat motors or control modules.
• Cost: $300 - $600

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Summary Verdict

The 2006 INFINITI Q45 is a capable luxury sedan with a generally good reliability rating for its age. The 4.5L V8 engine is robust, though timing chain tensioner wear and oil leaks are potential concerns. The automatic transmission is mostly reliable, but some instances of harsh shifting have been noted. Suspension components, particularly ball joints and the optional rear air suspension, can require attention. Electrical issues, such as BCM glitches and instrument cluster problems, are more common than in less complex vehicles. Interior components like HVAC resistors and seat actuators can also fail. Overall, with diligent maintenance and addressing specific known issues, the Q45 can remain a dependable and enjoyable luxury vehicle.