2012 Mitsubishi Montero Sport
2012 Mitsubishi Montero Sport
Overview
The 2012 Mitsubishi Montero Sport, also known as the Pajero Sport in many markets, is a body-on-frame SUV that emphasizes ruggedness and off-road capability. It was generally well-regarded for its durability, particularly in its powertrain. However, like any vehicle, it has specific areas that have seen more attention from owners and technicians. This analysis focuses on documented technical reliability concerns, excluding routine maintenance and expected wear. We will examine the engine and transmission options, suspension, electrical systems, and interior/exterior components to provide a comprehensive reliability picture for this model year.
Engine
3.0L V6 MIVEC (6G72)
Coolant Leaks
- Symptoms: Visible coolant puddles under the vehicle, overheating, sweet smell from engine bay.
- Solution: Replacement of leaking hoses, gaskets, or radiator.
- Cost: $250 - $600
Timing Belt Wear
- Symptoms: Engine misfires, rough idling, potential catastrophic engine damage if it breaks.
- Solution: Replacement of timing belt, tensioner, and idler pulleys.
- Cost: $500 - $900
2.5L 4D56 Turbo Diesel
Turbocharger Failure
- Symptoms: Loss of power, excessive smoke, whining or whistling noises from the engine bay.
- Solution: Replacement of the turbocharger unit.
- Cost: $800 - $1500
Injector Issues
- Symptoms: Rough idling, poor fuel economy, engine misfires, difficulty starting.
- Solution: Cleaning or replacement of fuel injectors.
- Cost: $400 - $800
Transmission
5-Speed Automatic (W5A5A)
Slipping Gears
- Symptoms: Delayed engagement, engine revs without vehicle acceleration, harsh shifting.
- Solution: Transmission fluid and filter change, potential internal component repair or rebuild.
- Cost: $300 - $1500+
5-Speed Manual
Clutch Wear
- Symptoms: Slipping clutch, difficulty shifting gears, burning smell.
- Solution: Replacement of clutch disc, pressure plate, and release bearing.
- Cost: $600 - $1000
Suspension
Independent Front Suspension / Solid Rear Axle
Worn Ball Joints/Bushings
- Symptoms: Clunking noises over bumps, vague steering, uneven tire wear.
- Solution: Replacement of worn ball joints and suspension bushings.
- Cost: $300 - $700
Electrical
Standard Electrical System
Alternator Failure
- Symptoms: Dimming headlights, battery warning light illuminated, electrical components malfunctioning.
- Solution: Replacement of the alternator.
- Cost: $400 - $700
Window Regulator Issues
- Symptoms: Power windows not operating, slow window movement, grinding noise when operating.
- Solution: Replacement of the window regulator mechanism.
- Cost: $200 - $400
Exterior
Body Panels and Trim
Rust on Frame/Body
- Symptoms: Visible corrosion, bubbling paint, structural weakness.
- Solution: Rust treatment, panel repair or replacement, undercoating.
- Cost: $500 - $2000+
Interior
Interior Trim and Upholstery
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Summary Verdict
The 2012 Mitsubishi Montero Sport generally presents a solid reliability record, especially concerning its robust powertrain options. The 3.0L V6 and 2.5L diesel engines are known for their durability, though common issues like coolant leaks and timing belt wear on the V6, and turbocharger or injector problems on the diesel, can arise. Automatic transmission issues such as slipping gears are the most frequently cited concern, while manual transmissions may require clutch replacements over time. Suspension components like ball joints and bushings are typical wear items for an SUV of this age and type. Electrical gremlins, particularly alternator failures and window regulators, are also noted. Exterior rust, especially on the frame, is a significant concern for vehicles in corrosive environments. Overall, with diligent maintenance and addressing specific known issues, the Montero Sport can remain a reliable vehicle.