Checks, in order
- Overnight sag testPark on level ground and measure rear ride height (owners use about 36 inches from the ground to the fender lip as the target) at night and again in the morning. A corner that drops overnight is leaking: air spring, line or fitting. Soapy water on the spring and fittings finds it.easy $ · under about $50
- Compressor and relayListen for the compressor after starting the truck with a load in the back. One that runs constantly is feeding a leak; one that never runs with a low rear end is a compressor, relay or fuse problem. Compressors that pump leaking springs for months overheat and die, so fix the leak first.medium $$ · about $50 to $500
- Height sensors and linkageEach rear height sensor has a linkage that corrodes or bends. A soft, bouncy ride with a working compressor points to the sensors reading wrong rather than a leak. Check the linkage for play and the connector for corrosion before replacing anything.medium $$ · about $50 to $500
- Repair or convertOEM rear air struts run several hundred dollars each before labor. Conversion kits to steel coils (Strutmasters, around $370 for springs, shocks and hardware; Ironman 4x4 sells an adjustable airbag-delete kit) are the common fix on trucks used off road, and they remove the leveling function. Kits may not switch off the dash warning, so ask before buying.medium $$ · about $50 to $500
Applies to: Lexus GX 460, 2010 to 2023, with the 1UR-FE 4.6L V8 and the A760F 6-speed automatic. Air suspension items apply to Premium (2010–2013) and Luxury (2014+) trims with rear air springs; KDSS was standard on most US trucks. Secondary air injection items apply to 2010–2013.
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 |
|---|---|---|
| Pry bar set | Checking ball joints, bushings and tie rod ends for play | Shop on Amazon |
| Sway bar end links | A common clunk source and a cheap fix | Shop on Amazon |
| Outer tie rod ends | Replacing worn tie rod ends | Shop on Amazon |
| 1/2" drive click torque wrench | Tightening suspension and driveline bolts to spec | Shop on Amazon |
The same problem on other Toyotas
- 2nd Gen Sequoia (2008–2022): Rear end sags, leans, or rides harsh; air compressor runs constantly or not at all (Platinum)
- Lexus GX 470 (2003–2009): Rear end sags overnight or leans, compressor runs long or never, suspension warning light
Other steering & suspension problems on the Lexus GX 460
- Truck sits lower on one side, leans right, or KDSS feels stiff after a lift
- Steering wheel flutter or vibration at 55–70 mph that balancing did not fix
More Lexus GX 460 problems
- Check engine light with flashing 4LO and TRAC OFF, won't shift past 3rd or 4th when cold (P2714) (Transmission)
- Check engine light with 4LO and TRAC OFF flashing, codes P0418, P2440, P2442, P2445 (2010–2013) (Emissions)
- Pink crust around the front of the engine, coolant smell, or slow coolant loss with no puddle (Cooling)
- Oil on the front of the engine, oil in the spark plug wells, or burning oil smell after a drive (Engine)
- Engine stalls, cranks but won't start, or runs rough under load (2018–2019 fuel pump recall) (Fuel & Ignition)
All 8 Lexus GX 460 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.