G50
Infiniti Q45 (1990–1996)
Maintenance Schedule
7 recurring services keep the 1990–1996 Infiniti Q45 healthy — starting with oil changes every 3,000 miles. Budget roughly $2,900–4,900 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1990, 1991, 1992, 1993, 1994, 1995, 1996
Full schedule
Intervals follow the factory maintenance schedule for the 1990-1996 Infiniti Q45. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,000 mi or 3 mo | $40–65 | Engine oil and filter replacement (V8) |
| Air Filter | Every 15,000 mi or 12 mo | $22–40 | Engine air filter replacement |
| Spark Plugs | Every 30,000 mi or 30 mo | $120–220 | Spark plugs replacement (V8) |
| Brake Fluid | Every 30,000 mi or 2 yr | $60–90 | Brake fluid replacement |
| Transmission Fluid | Every 30,000 mi or 3 yr | $80–140 | Automatic transmission fluid change |
| Coolant Flush | Every 30,000 mi or 3 yr | $70–110 | Cooling system flush and refill |
| Timing Belt | Every 60,000 mi or 5 yr | $500–850 | Timing belt and water pump replacement |
Common questions
How often should I change the oil on a 1990–1996 Infiniti Q45?
Every 3,000 miles or 3 months, whichever comes first. A typical U.S. shop charges $40–65. Engine oil and filter replacement (V8).
How much does it cost to maintain a Infiniti Q45 (1990–1996)?
Routine maintenance on the 1990–1996 Infiniti Q45 runs roughly $2,900–4,900 over 100,000 miles at typical U.S. shop prices, spread across 7 recurring services. Independent shops usually land near the low end; dealers near the high end.
What is the most expensive scheduled service on this Q45?
Timing Belt at $500–850, 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.