2004 Mitsubishi Montero
2004 Mitsubishi Montero
Overview
The 2004 Mitsubishi Montero, also known as the Pajero in many markets, is a robust body-on-frame SUV renowned for its off-road capabilities. While generally considered reliable, like any vehicle of its age, it has specific areas that have seen more attention from owners. This analysis focuses on common reported issues beyond routine maintenance, providing insights into potential mechanical and electrical concerns that may arise. Understanding these potential weak points can help owners prepare for and address them proactively, ensuring the Montero continues to perform as expected, especially for those who push its off-road limits.
Engine
3.5L V6 (6G74)
Intake Manifold Gasket Leaks
- Symptoms: Coolant leaks, engine misfires, rough idle, potential overheating.
- Solution: Replacement of intake manifold gaskets.
- Cost: $300 - $600
Timing Belt Failure
- Symptoms: Sudden engine shutdown, no start, significant internal engine damage if belt breaks.
- Solution: Replacement of timing belt, tensioners, and idler pulleys. If failure occurred, engine rebuild or replacement may be necessary.
- Cost: $600 - $1200 (preventative), $3000+ (if failed)
3.8L V6 (6G75)
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
Transmission
4-Speed Automatic (V4A5A)
Harsh Shifting / Slipping
- Symptoms: Delayed engagement, rough shifts between gears, slipping sensation.
- Solution: Transmission fluid and filter change, solenoid replacement, or full transmission rebuild.
- Cost: $250 - $500 (fluid/filter), $500 - $1500 (solenoids), $2000 - $4000 (rebuild)
5-Speed Automatic (V5A5A)
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
5-Speed Manual
No widespread issues reported.
- Symptoms: No widespread issues reported.
- Solution: No widespread issues reported.
- Cost: No widespread issues reported.
Suspension
Independent Front Suspension / Multi-Link Rear
Worn Ball Joints and Bushings
- Symptoms: Clunking noises over bumps, vague steering, uneven tire wear.
- Solution: Replacement of worn ball joints and suspension bushings.
- Cost: $400 - $800
Active Stability Control (ASC) Sensor Issues
- Symptoms: ASC warning light illuminated, potential issues with traction control.
- Solution: Diagnosis and replacement of faulty ASC sensors.
- Cost: $300 - $700
Electrical
Body Control Module (BCM)
Intermittent Electrical Gremlins
- Symptoms: Malfunctioning power windows, door locks, interior lights, or dashboard indicators.
- Solution: Diagnosis and potential reprogramming or replacement of the BCM.
- Cost: $500 - $1200
Alternator
Premature Failure
- Symptoms: Dimming headlights, battery warning light, dead battery.
- Solution: Replacement of the alternator.
- Cost: $400 - $700
Exterior
Body Panels and Trim
Rust and Corrosion
- Symptoms: Visible rust on frame, wheel wells, rocker panels, and doors, especially in rust-belt regions.
- Solution: Rust treatment, panel repair, or replacement.
- Cost: $200 - $2000+ (depending on severity)
Sunroof Drain Tubes
Clogged Drain Tubes
- Symptoms: Water leaks into the cabin, musty smell, potential damage to interior electronics.
- Solution: Clearing of sunroof drain tubes.
- Cost: $100 - $250
Interior
HVAC System
Blend Door Actuator Failure
- Symptoms: Inability to control temperature or direct airflow (e.g., stuck on defrost).
- Solution: Replacement of the blend door actuator.
- Cost: $200 - $400
Seat Heaters
Malfunctioning Seat Heaters
- Symptoms: One or both front seat heaters not working.
- Solution: Repair or replacement of heating elements or wiring.
- Cost: $300 - $600
Summary Verdict
The 2004 Mitsubishi Montero is a capable and generally durable SUV, particularly favored for its off-road prowess. Owners should be aware of potential issues with the 3.5L V6 engine’s timing belt and intake gaskets, as well as common automatic transmission problems like harsh shifting. Suspension components, especially ball joints and bushings, may require attention due to age and use. Electrical gremlins, particularly related to the BCM and alternator, are also noted. Exterior rust can be a concern in certain climates. While these issues exist, proactive maintenance and addressing them promptly can ensure the Montero remains a reliable vehicle for its intended purpose.