2009 INFINITI M45

2009 INFINITI M45

Overview

The 2009 INFINITI M45, a luxury sedan known for its potent V8 engine and refined interior, generally presents a solid reliability record. While no vehicle is entirely without potential issues, the M45 has demonstrated good durability for its model year. Owners often praise its performance and comfort. However, like many vehicles of this age, certain components may require attention. This analysis focuses on documented common issues beyond routine maintenance, providing insights into potential areas of concern for prospective buyers or current owners.

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Engine

4.5L V8 (VK45DE)

Oil Leaks (Valve Covers/Gaskets)

• Symptoms: Visible oil residue around the engine, burning oil smell, low oil level.
• Solution: Replacement of valve cover gaskets or other seals.
• Cost: $300 - $600

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: $1000 - $2000

Transmission

5-Speed Automatic (RE5R05A)

Harsh Shifting / Delayed Engagement

• Symptoms: Jerky gear changes, hesitation when shifting into drive or reverse.
• Solution: Transmission fluid and filter service, potential valve body or solenoid replacement.
• Cost: $400 - $1200

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 entire control arms.
• Cost: $400 - $800

Electrical

General Electrical System

Infotainment System Glitches

• Symptoms: Screen freezing, unresponsive touch controls, navigation issues.
• Solution: Software update, potential head unit replacement.
• Cost: $200 - $1500

Keyless Entry/Start System Malfunctions

• Symptoms: Difficulty starting the vehicle, intermittent key fob recognition.
• Solution: Reprogramming key fobs, replacement of intelligent key module or related sensors.
• Cost: $300 - $700

Exterior

Body and Trim

No Major Issues

• Symptoms: No Major Issues
• Solution: No Major Issues
• Cost: No Major Issues

Interior

Cabin Components

Sunroof Drain Clogs

• Symptoms: Water leaks into the cabin, musty smell, potential headliner damage.
• Solution: Clearing sunroof drains.
• Cost: $100 - $250

Heated Seat Malfunction

• Symptoms: One or both heated seats not working.
• Solution: Replacement of heating elements or seat control modules.
• Cost: $300 - $600

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Summary Verdict

The 2009 INFINITI M45 offers a compelling blend of performance and luxury, with a generally reliable mechanical foundation. The V8 engine, while powerful, can be susceptible to age-related oil leaks and potential timing chain wear, which are the most significant engine concerns. Transmission issues, though not widespread, can manifest as harsh shifting. Common electrical gremlins often involve the infotainment and keyless entry systems. Interior issues like clogged sunroof drains are manageable. Overall, the M45 is a durable vehicle, but potential buyers should be aware of these specific areas and factor in potential repair costs for a vehicle of this age.