2004 Mitsubishi Montero Sport

2004 Mitsubishi Montero Sport

Overview

The 2004 Mitsubishi Montero Sport, a body-on-frame SUV, offered a blend of rugged capability and family-friendly utility. Known for its off-road prowess and durable construction, it generally presented a reliable package for its era. However, like any vehicle, certain components and systems can experience issues over time. This analysis focuses on documented technical reliability concerns, excluding routine maintenance and normal wear and tear, to provide a clear picture of potential problem areas for owners and prospective buyers of this model year.

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Engine

3.5L V6 (6G74)

Intake Manifold Gasket Leaks

• Symptoms: Coolant leaks, engine misfires, rough idle, overheating.
• Solution: Replacement of intake manifold gaskets.
• Cost: $300 - $600

Timing Belt Failure

• Symptoms: Sudden engine shutdown, no start, potential severe engine damage if belt breaks.
• Solution: Replacement of timing belt, tensioners, and idler pulleys. Recommended at specified intervals.
• Cost: $500 - $900

Transmission

4-Speed Automatic (V4A51)

Slipping Gears

• Symptoms: Delayed engagement, difficulty shifting, loss of power during acceleration.
• Solution: Transmission fluid and filter change, potential internal repairs or rebuild.
• Cost: $250 - $1500+

5-Speed Manual

No Major Issues

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

Suspension

Independent Front Suspension / Solid Rear Axle

Ball Joint Wear

• Symptoms: Clunking noises, uneven tire wear, steering wander.
• Solution: Replacement of worn ball joints.
• Cost: $300 - $700

Worn Bushings

• Symptoms: Squeaking or creaking noises over bumps, vague steering feel.
• Solution: Replacement of worn suspension bushings.
• Cost: $200 - $500

Electrical

General Electrical System

Alternator Failure

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

Window Regulator Issues

• Symptoms: Power windows not operating, slow window movement, grinding noises.
• Solution: Replacement of window regulator mechanism.
• Cost: $200 - $400

Exterior

Body and Trim

Rust on Frame and Body Panels

• Symptoms: Visible corrosion, bubbling paint, structural weakness.
• Solution: Rust treatment, panel replacement, or frame repair depending on severity.
• Cost: $500 - $3000+

Interior

Cabin Components

HVAC Blower Motor Failure

• Symptoms: No air conditioning or heat from vents, intermittent fan operation.
• Solution: Replacement of the blower motor and resistor.
• Cost: $200 - $400

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Summary Verdict

The 2004 Mitsubishi Montero Sport is generally considered a robust vehicle, particularly its powertrain and chassis. The most common reported issues tend to be related to age and mileage, such as intake manifold leaks on the V6 engine and potential wear in suspension components like ball joints and bushings. Electrical gremlins like alternator failure and window regulator problems are also noted. Rust can be a significant concern depending on the vehicle’s climate and maintenance history. While not immune to problems, addressing these potential issues proactively can help maintain the Montero Sport’s reliability and off-road capability.