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100 Series Land Cruiser / Lexus LX 470: Power steering fluid leak, whining pump or heavy steering

Safety: If the steering becomes very heavy or fluid is pouring out, stop driving and get it inspected.

Checks, in order

  1. Fluid level and condition
    Check the reservoir. Foamy fluid or a whining pump suggests low fluid or air. Top off only with the fluid specified for your truck.
    easy $ · under about $50
  2. Clean and find the leak
    Clean around the pump, hoses and rack, drive a short distance, then look. Wetness at the hose ends and fittings is the cheapest fix.
    easy $ · under about $50
  3. High-pressure and return hoses
    Inspect the hoses for seeping crimps, swelling and rubbing. Replace any that are wet or soft.
    medium $$ · about $50 to $500
  4. Rack ends and pinion area
    Check the rubber boots at each end of the rack. Boots swollen or wet with fluid, or fluid near the pinion where the rack meets the steering shaft, mean the rack is leaking internally.
    medium $$ · about $50 to $500
  5. Replace or reseal the rack
    A leaking rack is usually replaced with a remanufactured unit. Plan for an alignment afterward and flush the system so debris does not damage the new rack.
    hard $$$ · shop-level job, $500+

Applies to: US-market UZJ100 Land Cruiser and Lexus LX 470, 1998 to 2007, with the 2UZ-FE 4.7L V8 (timing belt). AHC items apply to the LX 470 only; most US Land Cruisers have conventional shocks. Transmission is the A343F or A750F depending on year, so check the fluid spec for your truck.

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.

ITEMUSED FORBUY
Power steering fluid for your truckTopping off with the factory-type fluidShop on Amazon
UV leak detection kitFinding where the fluid is escapingShop on Amazon
Fluid transfer pumpFilling through the fill or check plugShop on Amazon
Pry bar setChecking ball joints, bushings and tie rod ends for playShop on Amazon

More 100 Series Land Cruiser / Lexus LX 470 problems

All 15 100 Series Land Cruiser / Lexus LX 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.