R50
Infiniti QX4 (1997–2003)
Maintenance Schedule
8 recurring services keep the 1997–2003 Infiniti QX4 healthy — starting with oil changes every 3,750 miles. Budget roughly $2,100–3,500 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 1997, 1998, 1999, 2000, 2001, 2002, 2003
Full schedule
Intervals follow the factory maintenance schedule for the 1997-2003 Infiniti QX4. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,750 mi or 6 mo | $40–65 | Engine oil and filter replacement |
| Brake Fluid | Every 30,000 mi or 2 yr | $55–85 | Brake fluid replacement |
| Timing Belt | Every 60,000 mi or 5 yr | $500–850 | 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 | $90–150 | Automatic transmission fluid change |
| Transfer Case Fluid | Every 60,000 mi or 5 yr | $70–120 | 4WD transfer case fluid change |
| Differential Service | Every 60,000 mi or 5 yr | $100–170 | Front and rear differential fluid change |
| Coolant Flush | Every 60,000 mi or 5 yr | $75–125 | Extended life coolant flush and refill |
Common questions
How often should I change the oil on a 1997–2003 Infiniti QX4?
Every 3,750 miles or 6 months, whichever comes first. A typical U.S. shop charges $40–65. Engine oil and filter replacement.
How much does it cost to maintain a Infiniti QX4 (1997–2003)?
Routine maintenance on the 1997–2003 Infiniti QX4 runs roughly $2,100–3,500 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 QX4?
Timing Belt at $500–850, due every 60,000 miles. Timing belt and water pump replacement.
Cost ranges are typical U.S. independent-shop and dealer estimates; your local prices vary. Severe driving — towing, short trips, extreme heat or cold — shortens many intervals. Information here is general and may be estimated or AI-assisted — not professional, medical, or veterinary advice. Verify against your owner's manual, a professional, or your vet before acting. See our Terms & Disclaimer.