1st Gen (UZJ120)
Lexus GX (2003–2009)
Maintenance Schedule
8 recurring services keep the 2003–2009 Lexus GX healthy — starting with oil changes every 5,000 miles. Budget roughly $3,700–5,300 in routine maintenance over 100,000 miles at typical U.S. shop prices.
Applies to model years 2003, 2004, 2005, 2006, 2007, 2008, 2009
Full schedule
Intervals follow the factory maintenance schedule for the 2003-2009 Lexus GX. Cost ranges are typical U.S. shop prices.
| Service | Interval | Est. cost | Notes |
|---|---|---|---|
| Oil Change | Every 5,000 mi or 6 mo | $60–85 | Premium oil and filter replacement |
| Transfer Case Service | Every 30,000 mi or 30 mo | $150–220 | Transfer case service |
| Differential Service | Every 30,000 mi or 30 mo | $180–250 | Front and rear differential service |
| Brake Service | Every 30,000 mi or 2 yr | $200–300 | Heavy-duty brake inspection and fluid change |
| Air Filter | Every 30,000 mi or 2 yr | $55–75 | Premium engine air filter |
| Tune-Up | Every 100,000 mi or 100 mo | $300–450 | Spark plugs replacement |
| Transmission Service | Every 100,000 mi or 100 mo | $250–350 | Transmission fluid change |
| Coolant Service | Every 100,000 mi or 100 mo | $200–280 | Long-life coolant replacement |
Common questions
How often should I change the oil on a 2003–2009 Lexus GX?
Every 5,000 miles or 6 months, whichever comes first. A typical U.S. shop charges $60–85. Premium oil and filter replacement.
How much does it cost to maintain a Lexus GX (2003–2009)?
Routine maintenance on the 2003–2009 Lexus GX runs roughly $3,700–5,300 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 GX?
Tune-Up at $300–450, due every 100,000 miles. Spark plugs 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.