1998 mitsubishi montero ls
1998 Mitsubishi Montero LS: Complete Buyer's Guide, Common Problems & Expert FAQ
The 1998 Mitsubishi Montero LS is one of the most affordable boxy SUVs still on the road today. It offers body-on-frame ruggedness, part-time 4WD capability, and a reputation for lasting well past 200,000 miles — if you know what to watch for. This guide answers the exact questions every buyer, owner, and prospective owner needs before signing the paperwork.
Key Takeaways at a Glance
- Engine: 3.5L 24-valve SOHC V-6 producing 188 hp and 220 lb-ft of torque
- Drivetrain: Part-time 4WD with a two-speed transfer case (high/low range)
- Towing capacity: Up to 5,000 lbs when properly equipped
- Maintenance highlights: Timing belt replacement every 60,000–100,000 miles, differential fluid changes, and front axle seal inspections
- Common failure points: Front axle shafts, rear main crankshaft seal, AWD actuator issues, rust on frame rails, and suspension bushing wear
- Average price range (2026): $4,000 – $10,000 depending on mileage and condition
- Overall reliability rating: 3.5 out of 5 — solid but requires disciplined maintenance
Overview: What Is the 1998 Mitsubishi Montero LS?
The 1998 model year represents the second generation (N4xx series) of the Mitsubishi Montero, which launched in 1992. The LS trim sits above the base model and adds cloth upholstery, power accessories, upgraded wheels, and often an available third-row seat option. Built in Nakijin, Japan, the Montero shares its platform with the Mitsubishi Pajero sold internationally.
It competes directly with the first-gen Toyota 4Runner, Nissan Pathfinder, and Ford Explorer of the same era. Unlike many soft-roaders introduced around it, the Montero retains a traditional truck-based layout with a solid front axle and leaf-spring rear, making it far more capable off-road than crossovers of the period.
Common Problems & Known Weak Points
Every used vehicle has trouble spots. Understanding them before purchase can save thousands in repairs. Below are the issues most frequently reported by owners, mechanics, and automotive forums for the 1998 Montero LS.
Front Axle Shaft Wear and Failure
The C3 or C4 front axle shafts are widely regarded as the Montero's most notorious weakness. The splined connection between the axle and the wheel hub wears over time, leading to vibration at highway speeds, clicking noises during turns, or complete separation while driving. Replacement costs typically run $400–$900 per side including parts and labor unless performed DIY.
Rear Main Crankshaft Seal Leaks
The 3.5L V-6 engine uses a rear main seal that is known to degrade between 120,000 and 180,000 miles. Oil seeping from the transmission bellhousing area is the telltale sign. Repair requires dropping the transmission and torque converter — a job costing $1,200–$2,000 at a shop. Some owners preemptively replace this seal during timing belt service to avoid double labor charges later.
Transfer Case and AWD Actuator Issues
The electronic AWD actuator located on the transfer case can fail, causing the dashboard 4WD indicator to flicker or remain stuck. Fluid breakdown inside the transfer case also occurs if intervals exceed 30,000 miles. Rebuilding the actuator or swapping in a known-good used unit is a common fix in the community.
Frame Rail Rust
Monteros built for northern U.S. states that see road salt are prone to corrosion along the frame rails, especially behind the rear suspension mounting points. Always inspect the undercarriage with a flashlight before buying. Severe frame rot can make the vehicle unsafe and may be a title-brand risk in some states.
Front Suspension Bushings and Ball Joints
The upper control arm bushings and lower ball joints wear prematurely, contributing to wandering steering feel and uneven tire wear. Rebuilding the entire front suspension with modern polyurethane bushings is a popular upgrade that significantly improves on-road manners.
Power Steering Rack leaks
Internal seals in the power steering rack tend to harden with age, resulting in low fluid reservoir levels and whining pump noise. Reconditioning the rack or replacing it with an aftermarket rebuilt unit runs approximately $300–$600.
Maintenance Schedule & Cost Checklist
Following a disciplined maintenance routine is the single biggest factor in determining whether your Montero becomes a reliable daily driver or a money pit. Use this checklist each service interval:
| Service Item | Interval | Estimated Cost (DIY / Shop) | Priority |
|---|---|---|---|
| Engine oil and filter change | Every 5,000 miles or 6 months | $30 / $80 | High |
| Timing belt and water pump | Every 60,000–100,000 miles | $150 / $1,200 | Critical |
| Coolant flush | Every 30,000 miles | $40 / $120 | Medium |
| Transfer case fluid change | Every 30,000 miles | $30 / $90 | High |
| Differential fluid (front and rear) | Every 30,000 miles | $40 combined / $150 | High |
| Front axle shaft inspection | Every 15,000 miles | Inspect free / $500+ | High |
| Spark plugs and ignition wires | Every 60,000 miles | $80 / $350 | Medium |
| Brake pads and rotors | As needed | $200 / $700 per axle | High |
| Suspension bushings and ball joints | Every 60,000–100,000 miles | $150 kit / $900 installed | Medium |
| Throttle body and idle air control valve cleaning | Every 30,000 miles | $20 / $150 | Low |
How the 1998 Montero LS Compares to Its Rivals
If you are considering the Montero alongside other mid-90s SUVs, this comparison will help you weigh strengths and weaknesses side by side.