🔧 Highlander - Power Steering Pump Replacement

Your Highlander does not use a hydraulic power steering pump. It uses Electric Power Steering (EPS), so there’s no pump, no belt-driven unit, and no power steering fluid to replace or bleed.

What you replace instead: the EPS steering rack/gear assembly (the electric motor and control unit are part of the rack on most setups) if it has failed.

Difficulty Level: Advanced | Estimated Time: 4-7 hours

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⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery terminal and wait 90 seconds before working near steering components (airbag system protection).
• ⚠️ Keep the steering wheel centered and locked; do not let it spin with the rack disconnected (prevents clock spring damage).
• ⚠️ Use jack stands on solid points; never work under a vehicle supported only by a jack.
• ⚠️ After steering work, you must get a professional alignment. Driving without it can be unsafe.
• ⚠️ EPS may require steering angle sensor zero-point calibration with a scan tool after install.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Torque wrench (20–200 ft-lbs range)
• Socket set (10mm–22mm)
• Wrench set (10mm–22mm)
• Breaker bar (1/2-inch drive)
• Trim clip removal tool
• Flathead screwdriver
• Pry bar
• Needle-nose pliers
• Tie rod end puller (specialty)
• Paint marker
• Bungee cord
• Engine support bar (specialty)
• Scan tool with Toyota EPS/SAS calibration (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• EPS steering rack/gear assembly - Qty: 1
• Outer tie rod ends - Qty: 2 Replace in pairs
• Steering rack mounting hardware (bolts/nuts as applicable) - Qty: 1 set
• Steering intermediate shaft pinch bolt/nut (as applicable) - Qty: 1
• Front subframe bolts (as applicable) - Qty: 1 set
• Threadlocker (medium strength) - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and use wheel chocks behind the rear wheels.
• Center the steering wheel and keep it centered. Use a seat belt through the wheel or a bungee cord to hold it in place.
• Disconnect the battery using a 10mm socket on the negative terminal, then wait 90 seconds.
• Plan for calibration: have a scan tool with Toyota EPS/SAS functions ready. (Calibration “teaches” the vehicle straight-ahead again.)
• Assumption: Your Highlander has EPS (no hydraulic pump/fluid), which is standard for this model.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the front end

• Use a floor jack (rated 3-ton minimum) to lift the front.
• Set the vehicle down onto jack stands (rated 3-ton minimum) at the proper lift points.
• Remove both front wheels using a 21mm socket (typical lug size) and a breaker bar.

Step 2: Remove under covers/splash shields

• Remove clips and screws using a trim clip removal tool, 10mm socket, and flathead screwdriver.
• Set all fasteners aside in a tray so they don’t get lost.

Step 3: Disconnect the outer tie rod ends

• Remove the cotter pin with needle-nose pliers (a cotter pin is a small safety pin that locks the nut).
• Remove the tie rod end nut using a 19mm socket (common size).
• Separate the joint using a tie rod end puller (specialty).
• Tip: Don’t hammer the steering knuckle.

Step 4: Mark and disconnect the steering intermediate shaft

• Use a paint marker to mark the relationship between the shaft and rack input (helps keep the steering wheel centered).
• Remove the pinch bolt using a 12mm socket or 14mm socket (varies by fastener).
• Slide the shaft up/off the rack input. Use a pry bar gently if needed.
• Tip: Keep the steering wheel locked centered.

Step 5: Disconnect EPS electrical connectors

• Unplug the EPS connectors from the rack using a flathead screwdriver to release locking tabs if needed.
• Inspect for corrosion or damaged pins before reassembly.

Step 6: Support the powertrain and loosen the front subframe (if required for clearance)

• Install an engine support bar (specialty) and tension it per the tool instructions (this supports the engine from above).
• Use a paint marker to mark subframe position to help alignment on reinstall.
• Loosen subframe bolts with a breaker bar (1/2-inch drive) and the appropriate socket set (17mm–22mm).
• Lower the subframe slightly as needed for rack removal, while watching for strain on hoses/wiring.

Step 7: Remove the steering rack mounting bolts and rack

• Remove rack mounting bolts using a socket set (14mm–19mm) (varies by fastener).
• Support the rack as the last bolts come out so it doesn’t drop.
• Work the rack out through the opening (this may take rotating and careful maneuvering).

Step 8: Install the new EPS steering rack

• Compare old vs new rack (connectors, mounts, length) before installing.
• Position the new rack and start all mounting bolts by hand.
• Apply threadlocker (medium strength) if the hardware requires it.
• Tighten mounting bolts with a torque wrench: Torque to 100 Nm (74 ft-lbs) (common rack mount spec; verify for your fasteners if available).

Step 9: Reinstall/torque the subframe (if loosened)

• Raise and align the subframe to your paint marks using a floor jack (rated 3-ton minimum).
• Tighten bolts with a torque wrench: Torque to 180 Nm (133 ft-lbs) (common subframe bolt range; verify for your fasteners if available).

Step 10: Reconnect the intermediate shaft

• Align your paint marks and slide the shaft onto the rack input.
• Install the pinch bolt using the correct socket and tighten with a torque wrench: Torque to 35 Nm (26 ft-lbs) (common pinch bolt spec; verify if available).

Step 11: Reconnect tie rod ends and set a basic toe

• Install tie rod ends and nuts using a 19mm socket and torque wrench: Torque to 49 Nm (36 ft-lbs) (typical; verify if available).
• Install a new cotter pin using needle-nose pliers.
• If you replaced tie rods: match the old length (count turns) to get you close enough to drive to alignment.

Step 12: Reinstall covers, wheels, and lower the vehicle

• Reinstall under covers using a 10mm socket and trim clip removal tool.
• Install wheels and snug lug nuts using a 21mm socket.
• Lower the vehicle and torque lug nuts with a torque wrench: Torque to 103 Nm (76 ft-lbs).

Step 13: Restore power and perform EPS/SAS calibration

• Reconnect the battery using a 10mm socket.
• Use a scan tool with Toyota EPS/SAS calibration (specialty) to perform steering angle sensor zero-point calibration.
• Clear EPS/ABS codes and recheck for returning faults.

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✅ After Repair

• Start the engine and confirm the steering wheel turns smoothly lock-to-lock with no binding.
• Verify the EPS warning light is off. If it’s on, scan using the scan tool and address codes.
• Road test at low speed first. Confirm the wheel is centered and it tracks straight.
• Get a 4-wheel alignment as soon as possible.

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💰 DIY vs Shop Cost

Shop Cost: $1,400-$3,000 (parts + labor)

DIY Cost: $650-$1,800 (parts only)

You Save: $750-$1,200 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 4-7 hours.

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🎯 Ready to get started?

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