S50
Infiniti FX45 (2003–2008)
Maintenance Schedule
8 recurring services keep the 2003–2008 Infiniti FX45 healthy — starting with oil changes every 3,750 miles. Budget roughly $2,600–4,000 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 2003, 2004, 2005, 2006, 2007, 2008
Full schedule
Intervals follow the factory maintenance schedule for the 2003-2008 Infiniti FX45. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 3,750 mi or 6 mo | $65–100 | Conventional or synthetic blend oil and filter (V8) |
| Brake Fluid | Every 30,000 mi or 2 yr | $75–110 | DOT 3 brake fluid replacement |
| Transmission Fluid | Every 60,000 mi or 5 yr | $160–250 | Automatic transmission fluid change |
| Transfer Case Fluid | Every 60,000 mi or 5 yr | $100–160 | AWD transfer case fluid change |
| Differential Service | Every 60,000 mi or 5 yr | $140–220 | Front and rear differential fluid change |
| Spark Plugs | Every 100,000 mi or 10 yr | $180–300 | Iridium spark plugs replacement (V8) |
| Coolant Flush | Every 100,000 mi or 10 yr | $95–155 | Long-life coolant flush and refill |
| Timing Chain | Every 150,000 mi or 15 yr | $1,200–2,000 | Timing chain, guides, and tensioner replacement |
Common questions
How often should I change the oil on a 2003–2008 Infiniti FX45?
Every 3,750 miles or 6 months, whichever comes first. A typical U.S. shop charges $65–100. Conventional or synthetic blend oil and filter (V8).
How much does it cost to maintain a Infiniti FX45 (2003–2008)?
Routine maintenance on the 2003–2008 Infiniti FX45 runs roughly $2,600–4,000 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 FX45?
Timing Chain at $1,200–2,000, due every 150,000 miles. Timing chain, guides, and tensioner 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.