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Lexus GX J120 (1st Generation)

2003–2009 · J120 · suv

First-gen GX (GX 470) shared its J120 platform with the Toyota Land Cruiser Prado 120 and the 4th-gen 4Runner. 4.7L 2UZ-FE V8, 5-speed automatic, full-time 4WD with Torsen center diff, height-adjustable air suspension on some trims, KDSS optional. Quiet cult classic in the overland/expedition community.

Watch out: Owner reports of rear air-bag (X-REAS / air-suspension) failures past 100k mi (common conversion to coilovers), and 2UZ-FE timing-belt service at 90k mi (interference engine). Pre-purchase: confirm timing belt receipts and inspect rear height-control behavior.

What your GX takes

The parts and fluids that fit this generation. Specs we publish are confirmed against two independent sources; the rest fill in as we verify them.

  • Wiper blades22" driver · 21" passenger✓ VerifiedView
  • BatteryGroup 27F · 710 CCA minFrom owner's manualShop
  • Tire sizeNot catalogued yetFind yours soon
  • Engine oilNot catalogued yetFind yours soon
  • Oil filterNot catalogued yetFind yours
  • Engine air filterNot catalogued yetFind yours
  • Cabin air filterNot catalogued yetFind yours
  • Spark plugsNot catalogued yetFind yours soon
  • Headlight bulbsNot catalogued yetFind yours soon
  • CoolantNot catalogued yetFind yours soon
  • Brake fluidNot catalogued yetFind yours soon
  • Transmission fluidNot catalogued yetFind yours soon
  • Tire pressureNot catalogued yetFind yours soon
  • Key fob batteryNot catalogued yetFind yours soon
  • Power steering fluidNot catalogued yetFind yours soon
  • Differential fluidNot catalogued yetFind yours soon
  • Serpentine beltNot catalogued yetFind yours soon
  • Brake padsNot catalogued yetFind yours soon
  • Wheel fitmentNot catalogued yetFind yours soon
  • Brake rotorsNot catalogued yetFind yours soon
  • ThermostatNot catalogued yetFind yours soon
  • A/C refrigerantNot catalogued yetFind yours soon
  • Fuel filterNot catalogued yetFind yours soon

Full clubhouse — owner Garage Lineage, common problems, year-by-year notes, and product picks — is on the build list.

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