The 1999 Mitsubishi Diamante was a mid-size luxury sedan/wagon produced from 1990 to 2001. For 1999, it was available in sedan and wagon body styles, with key trims like ES and LS. It stood out for offering a blend of European-inspired styling and Japanese engineering, often at a competitive price point, making it a compelling alternative in its segment.
The Good
The 1999 Diamante offered a smooth, comfortable ride and capable V6 performance, wrapped in a distinctive, upscale design. Its value proposition was strong, providing a luxurious feel and good features for the price, appealing to those seeking refinement without a premium badge.
The Bad
Potential owners should watch for transmission issues, particularly in earlier models. Electrical gremlins, especially with power accessories and climate control, are also noted. Rust, particularly in colder climates, can be a concern on the body and undercarriage.
1999 Mitsubishi Diamante: Quick Overview
- Engine Options: The 1999 Mitsubishi Diamante came standard with a 3.5-liter V6 engine.
- Horsepower: This V6 engine produced approximately 205 horsepower.
- Torque: Torque figures were around 230 lb-ft.
- Transmission: A 4-speed automatic transmission was standard on all models.
- Fuel Economy: EPA estimates for the 1999 Diamante were roughly 17 mpg city and 22 mpg highway.
- 0-60 Times: Acceleration to 60 mph typically fell in the 8-9 second range, depending on conditions.
- Towing Capacity: The Diamante was not designed for significant towing; towing capacity was generally not specified or rated.
- Trim Levels:
- ES (Eclipse): The base trim, offering a solid array of standard features for its class.
- LS (Luxury Sedan): The higher trim, adding more premium amenities and often optional packages.
- Key Trim Features (LS):
- Leather upholstery
- Power adjustable front seats
- Automatic climate control
- Premium audio system
- Moonroof
- Alloy wheels
- Fog lights
- Steering wheel mounted audio controls
- Key Trim Features (ES):
- Cloth upholstery
- Power windows and locks
- Air conditioning
- Cruise control
- AM/FM CD player
- Optional Features: Depending on the trim, options could include a premium sound system, heated seats, and a sunroof.
1999 Mitsubishi Diamante Specifications
Vehicle Information
| Year | 1999 |
| Make | Mitsubishi |
| Model | Diamante |
| Trim | - |
| Style | - |
| Type | Sedan |
| Category | Compact Car |
Manufacturing Details
| Made In | Australia |
| Manufacturing City | - |
Dimensions
| Doors | - |
| Curb Weight | - |
| Gross Vehicle Weight Rating | - |
| Overall Height | - |
| Overall Length | - |
| Overall Width | - |
| Wheelbase Length | - |
| Standard Seating | - |
Engine & Performance
| Engine | 3.5 L V-6 |
| Engine Size | 3.5L |
| Engine Cylinders | 6 |
| Transmission | - |
| Transmission Type | - |
| Transmission Speeds | - |
| Drivetrain | - |
Additional Features
| Anti-Brake System | - |
| Steering Type | - |
Pricing
| Manufacturer Suggested Retail Price (MSRP) | - |
| Invoice Price | - |
| Delivery Charges | - |
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What Problems Does the 1999 Mitsubishi Diamante Have?
The 1999 Mitsubishi Diamante, while generally well-regarded for its comfort and styling, does have some frequently reported issues that potential buyers should be aware of. One of the most common and significant concerns centers around the automatic transmission. Owners have reported instances of rough shifting, slipping gears, and premature failure, often requiring costly repairs or replacement. This seems to be a persistent issue across various model years of this generation. Another area of concern is the electrical system. Various electrical gremlins have been reported, including malfunctioning power windows, power seats, door locks, and issues with the climate control system. These can be frustrating and time-consuming to diagnose and repair. Overheating can also be an issue, with some owners experiencing coolant leaks or radiator problems, which, if not addressed promptly, can lead to more severe engine damage. The intake manifold gasket is also known to develop leaks. Due to its age, rust can be a significant factor, particularly in regions with harsh winters or high humidity. Inspecting the undercarriage, wheel wells, and rocker panels for corrosion is crucial. While specific recalls for the 1999 model year are not as widespread as for some other vehicles, it's always advisable to check the NHTSA website for any outstanding safety recalls that may apply. Long-term reliability can be variable; well-maintained examples can still offer good service, but the aforementioned issues, particularly with the transmission and electrical components, can lead to unexpected expenses as the vehicle ages.
How long will the 1999 Mitsubishi Diamante last?
Based on owner data and anecdotal evidence, the 1999 Mitsubishi Diamante can typically achieve between 150,000 to 200,000 miles with diligent maintenance. However, the long-term durability is significantly influenced by how well the transmission and cooling systems have been cared for. Early and consistent fluid changes for the transmission are critical to mitigating the risk of premature failure. Neglecting these aspects can lead to a much shorter service life, with significant repairs needed after 100,000-120,000 miles. Weaknesses that tend to manifest over time include the aforementioned transmission and electrical issues, as well as potential for body rust. Despite these, the powertrain, when properly maintained, can be robust for its era, offering a respectable lifespan for those who invest in upkeep.
What Technology & Safety Features are Included?
The 1999 Mitsubishi Diamante offered a decent array of technology and safety features for its time, aiming to provide a comfortable and secure driving experience. Standard technology included a multi-speaker AM/FM stereo with a CD player, providing the entertainment backbone. Power windows, power door locks, and cruise control were also standard, adding convenience. Higher trims, like the LS, often boasted an upgraded premium audio system for enhanced sound quality. Automatic climate control was a notable feature, allowing for consistent cabin temperature management without constant manual adjustment. Optional features could include a power sunroof, allowing for an airy cabin feel, and heated front seats, particularly beneficial in colder climates.
In terms of safety, the 1999 Diamante was equipped with essential features expected of a mid-size sedan. Standard safety equipment included front airbags, anti-lock braking system (ABS) for improved stopping control, and front seatbelt pretensioners. Side-impact door beams were integrated for enhanced occupant protection in side collisions. While specific crash-test ratings from agencies like the NHTSA or IIHS for the 1999 model year are not as readily available or detailed as for modern vehicles, it generally performed adequately for its era. However, it lacked the advanced driver-assistance systems common today, such as traction control, stability control, or advanced airbag systems. The focus was on passive safety and basic active systems like ABS. Overall, the tech and safety features were competitive for a 1999 luxury-oriented sedan, prioritizing comfort and fundamental safety over cutting-edge electronic aids.
What Colors Options are Available?
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In the meantime, feel free to explore the other sections for more content.
1999 Mitsubishi Diamante Prices and Market Value
When new, the 1999 Mitsubishi Diamante typically had an MSRP ranging from around $28,000 for the ES trim to over $35,000 for the fully equipped LS model. As with most vehicles, the Diamante experienced significant depreciation in its early years, a common trait for non-luxury brand sedans. Currently, on the used market, prices for a 1999 Mitsubishi Diamante can vary widely, generally falling between $1,500 and $4,000, heavily dependent on mileage, condition, and maintenance history. Factors significantly affecting its resale value include the presence of rust, the documented service history (especially concerning transmission maintenance), and the overall mechanical and cosmetic condition. Well-maintained examples with lower mileage can command higher prices, but overall, it remains a budget-friendly used car option.
1999 Mitsubishi Diamante Cost of Ownership
The 1999 Mitsubishi Diamante is generally economical to own, especially in the used market. Insurance costs are typically moderate, falling in line with other sedans of its class. Fuel costs are reasonable, averaging around $17-$22 per month depending on driving habits and current fuel prices for the V6 engine. Routine maintenance, like oil changes and tire rotations, is comparable to other vehicles. However, the potential for costly repairs, particularly to the transmission and electrical components, can make long-term ownership expenses unpredictable. While parts are generally available, specialized repairs might be more expensive. Overall, it's economical if major issues are avoided, but a costly ownership experience if significant mechanical failures occur.
1999 Mitsubishi Diamante Fuel Efficiency
Fuel Type
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1999 Mitsubishi Diamante Insurance
Insurance for a 1999 Mitsubishi Diamante is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.
reasonable repair costs.
How Does the 1999 Mitsubishi Diamante Compare to Other Sedan?
The 1999 Mitsubishi Diamante competed in a crowded mid-size sedan segment against rivals like the Toyota Camry, Honda Accord, Nissan Maxima, and Ford Taurus. In terms of performance, its 205-horsepower V6 offered good acceleration, often on par with or slightly better than base engine offerings from competitors, but perhaps not matching the sportier feel of a V6 Accord or Maxima. Its front-wheel-drive platform delivered a comfortable, compliant ride, prioritizing luxury over sporty handling, similar to the Camry or Taurus.
Feature-wise, the Diamante, especially in LS trim, was often praised for offering a generous list of amenities, including leather seats, automatic climate control, and premium audio, which could rival or exceed what was standard on similarly priced Accord or Camry models. The design was distinct, with a European flair, which appealed to some buyers looking for something different from the ubiquitous Japanese sedans.
Reliability is where the Diamante often faced challenges compared to its Japanese counterparts. While the Camry and Accord built reputations for bulletproof reliability, the Diamante had more documented issues, particularly with its transmission and electrical systems, which could lead to higher repair costs over time. The Maxima offered a good balance of performance and features but also had its own set of potential issues.
In terms of price, the Diamante was positioned as a value-oriented luxury alternative, often costing less than comparable models from more established luxury brands.
Recommendations: If long-term, worry-free reliability is the absolute top priority, the Toyota Camry or Honda Accord are superior alternatives, though they might offer a less opulent interior for the price. For a blend of sportiness and luxury, the Nissan Maxima is a comparable option, though also prone to specific issues. If a very budget-friendly option with good comfort is desired and one is willing to accept potential repair risks, the Diamante can still be a contender, particularly if a well-maintained example is found. For a similar price and potentially better reliability, a well-cared-for Ford Taurus with the V6 engine is also worth considering.
Final Verdict: Is the 1999 Mitsubishi Diamante a Good Sedan?
The 1999 Mitsubishi Diamante is ideal for budget-conscious buyers seeking a comfortable, stylish, and relatively well-equipped sedan that offers a touch of luxury without the premium price tag. It's a good choice for those who prioritize ride comfort and a distinct design over absolute, class-leading reliability. It is worth buying, but with significant caveats. The conditions under which it is most advisable to buy are strictly in the used market, focusing on well-maintained examples with meticulously documented service history, especially for the transmission. The LS trim generally offers a better feature set for the money. Prospective buyers should be prepared for potential repair costs, particularly related to the transmission and electrical systems. It's a car for someone who appreciates its value proposition and is willing to be proactive with maintenance.
Jovan
Jovan specializes in interpreting vehicle records and making sense of VIN data. With over 10 years of experience in the automotive data industry, his work ensures that every report is clear, accurate, and useful for car buyers.