Checks, in order
- Pull the boots backFluid inside either rack boot is the rack. A damp input shaft under the steering coupler is the same answer. Fluid at the pump or hoses is not.easy $ · under about $50
- Check the fluidLow, dark fluid means it has been running low and hot, which also kills the pump. Top up with the fluid specified for your year and watch the level while you plan the repair.easy $ · under about $50
- Replace the rackOwner-reported costs: a new rack at a dealer around $2,600 installed, a dealer install of an owner-supplied rack about $1,400, a Toyota remanufactured rack at an independent shop about $900, and budget remans under $800 installed. Flush the system and get an alignment after.hard $$$ · shop-level job, $500+
Applies to: Lexus GX 470, 2003 to 2009, with the 4.7L 2UZ-FE V8 (timing belt) and the A750F 5-speed automatic. Every US GX 470 has rear air suspension; KDSS was optional from 2004. It shares its chassis with the 4th gen 4Runner and 120 Series Prado, so many 4Runner parts and procedures apply.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Power steering fluid for your truck | Topping off with the factory-type fluid | Shop on Amazon |
| UV leak detection kit | Finding where the fluid is escaping | Shop on Amazon |
| Fluid transfer pump | Filling through the fill or check plug | Shop on Amazon |
| Gear oil for your truck | Changing diff oil to the factory spec | Shop on Amazon |
Other steering & suspension problems on the Lexus GX 470
More Lexus GX 470 problems
- Timing belt due or history unknown, coolant weep at the front of the engine (Engine)
- Ticking from the engine on cold start that fades as it warms (Engine)
- Rust on the frame, or play and a torn boot at the lower ball joints (Frame & Body)
- VSC TRAC and VSC OFF lights on, with or without a check engine light (Body & Electrical)
- Dashboard cracked, sticky or shiny and soft in the heat (Body & Electrical)
- Rear swing-out door will not open from outside or inside, or will not latch (Body & Electrical)
All 11 Lexus GX 470 symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.