F15A/F25A
Mitsubishi Diamante (1992–2004)
Maintenance Schedule
8 recurring services keep the 1992–2004 Mitsubishi Diamante healthy — starting with oil changes every 7,500 miles. Budget roughly $1,700–2,800 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
Full schedule
Intervals follow the factory maintenance schedule for the 1992-2004 Mitsubishi Diamante. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 7,500 mi or 6 mo | $40–65 | Conventional or synthetic blend oil and filter (V6) |
| Brake Fluid | Every 30,000 mi or 2 yr | $60–90 | Brake fluid replacement |
| Air Filter | Every 30,000 mi or 2 yr | $22–40 | Engine air filter replacement |
| Timing Belt | Every 60,000 mi or 5 yr | $600–1,000 | Timing belt and water pump replacement |
| Spark Plugs | Every 60,000 mi or 5 yr | $90–160 | Platinum spark plugs replacement (V6) |
| Transmission Fluid | Every 60,000 mi or 5 yr | $120–180 | Automatic transmission fluid change |
| Coolant Flush | Every 60,000 mi or 5 yr | $75–125 | Cooling system flush and refill |
| Fuel Filter | Every 60,000 mi or 5 yr | $40–70 | Fuel filter replacement |
Common questions
How often should I change the oil on a 1992–2004 Mitsubishi Diamante?
Every 7,500 miles or 6 months, whichever comes first. A typical U.S. shop charges $40–65. Conventional or synthetic blend oil and filter (V6).
How much does it cost to maintain a Mitsubishi Diamante (1992–2004)?
Routine maintenance on the 1992–2004 Mitsubishi Diamante runs roughly $1,700–2,800 over 100,000 miles at typical U.S. shop prices, spread across 8 recurring services. Independent shops usually land near the low end; dealers near the high end.
What is the most expensive scheduled service on this Diamante?
Timing Belt at $600–1,000, due every 60,000 miles. Timing belt and water pump replacement.
Cost ranges are estimates for typical U.S. independent shops and dealers; your local prices will vary. Always confirm intervals against your owner's manual — severe driving conditions (towing, short trips, extreme heat or cold) shorten many of them.