🔧 Highlander - Front Lower Ball Joint Replacement

This repair replaces the front lower ball joints, which connect the steering knuckle to the lower control arm and allow the front wheels to steer and move with the suspension. On your Highlander, the front lower ball joint is replaced as a bolt-on joint at the knuckle/control arm area, but it still requires careful lifting, support, and torqueing.

Difficulty Level: Intermediate | Estimated Time: 2-3 hours per side

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⚠️ Safety & Precautions

• ⚠️ Work on level ground and support your Highlander with jack stands. Never rely on a floor jack alone.
• ⚠️ The hybrid system does not normally need to be disabled for this suspension repair, but keep the vehicle powered OFF and the key/fob away from the cabin while working.
• ⚠️ Wear safety glasses. Ball joint separators can release suddenly when the taper breaks loose.
• ⚠️ Do not hammer directly on the threaded ball joint stud. Damaged threads can make the nut unsafe.
• ⚠️ Replace cotter pins with new ones. A cotter pin is a small locking pin that prevents the castle nut from backing off.
• ⚠️ If the ball joint has separated or the wheel has severe play, do not drive the vehicle until repaired.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 21mm lug nut socket
• Breaker bar 1/2-inch drive
• Torque wrench 1/2-inch drive
• Ratchet 1/2-inch drive
• 17mm socket
• 19mm socket
• 22mm socket
• 17mm box-end wrench
• 19mm box-end wrench
• Needle-nose pliers
• Ball joint separator (specialty)
• Dead blow hammer
• Pry bar 18-inch
• Wire brush
• Penetrating oil
• Paint marker
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower ball joint - Qty: 1 per side
• Front lower ball joints - Qty: 2 if replacing both sides
• Ball joint cotter pin - Qty: 1 per side
• Ball joint mounting bolts/nuts - Qty: as required if corroded or damaged

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📋 Before You Begin

• Park your Highlander on level ground, shift to Park, and set the parking brake.
• Place wheel chocks behind the rear wheels.
• Loosen the front lug nuts slightly before lifting the vehicle. Do not remove them yet.
• Spray penetrating oil on the ball joint nut and mounting fasteners. Let it soak for several minutes.
• If replacing only one side, compare the new part with the old one before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Wheel

• Use a 21mm lug nut socket and breaker bar 1/2-inch drive to loosen the front wheel lug nuts about 1/2 turn.
• Do not remove the lug nuts while the tire is still on the ground.
• Tip: Loosen before lifting.

Step 2: Lift and Support the Front

• Use a floor jack (rated 3-ton minimum) to lift the front of your Highlander at the front center jacking point.
• Place jack stands (rated 3-ton minimum) under the proper front support points.
• Lower the vehicle gently onto the jack stands and lightly shake the vehicle to confirm it is stable.

Step 3: Remove the Wheel

• Use the 21mm lug nut socket and ratchet 1/2-inch drive to remove the lug nuts.
• Remove the wheel and place it flat under the side of the vehicle as an extra safety backup.

Step 4: Inspect the Ball Joint Area

• Use a wire brush to clean rust and dirt from the ball joint nut, cotter pin area, and mounting bolts.
• Use penetrating oil on the ball joint nut and mounting bolts.
• Use a paint marker to mark the old ball joint position before removal. This helps you compare the new part’s position.

Step 5: Remove the Cotter Pin

• Use needle-nose pliers to straighten and pull out the cotter pin from the ball joint stud.
• If the cotter pin breaks, use the needle-nose pliers to remove all remaining pieces from the hole.

Step 6: Loosen the Ball Joint Castle Nut

• Use a 19mm socket or 22mm socket, depending on the replacement hardware size, with the ratchet 1/2-inch drive to loosen the ball joint castle nut.
• Leave the nut threaded on a few turns. This helps catch the joint when it pops loose.
• A castle nut is the slotted nut that lines up with the cotter pin hole.

Step 7: Separate the Ball Joint from the Knuckle

• Install the ball joint separator (specialty) between the ball joint and steering knuckle.
• A ball joint separator is a tool that safely presses the tapered stud loose from the steering knuckle.
• Tighten the separator using the correct socket from your tool set, commonly a 19mm socket, until the joint pops free.
• If needed, tap the side of the steering knuckle lightly with a dead blow hammer. Do not hit the threaded stud.

Step 8: Remove the Ball Joint Mounting Bolts

• Use a 17mm socket and ratchet 1/2-inch drive to remove the ball joint mounting bolts from the lower control arm/ball joint bracket area.
• If a nut turns with the bolt, hold it with a 17mm box-end wrench while loosening with the 17mm socket.
• Support the control arm by hand or with a pry bar 18-inch as needed. Do not let parts drop suddenly.

Step 9: Remove the Old Ball Joint

• Use the pry bar 18-inch gently to move the control arm enough to slide the old ball joint out.
• Remove the old ball joint from the knuckle/control arm area.
• Compare the old and new parts side by side before installing.

Step 10: Install the New Ball Joint

• Position the new front lower ball joint in the same orientation as the old one.
• Start all mounting bolts by hand first to avoid cross-threading.
• Use a 17mm socket and 17mm box-end wrench to snug the mounting bolts evenly.
• Torque ball joint mounting bolts to 89 Nm (66 ft-lbs).

Step 11: Seat the Ball Joint Stud

• Guide the ball joint stud into the steering knuckle by hand.
• Install the castle nut by hand first.
• Use a 19mm socket or 22mm socket with the torque wrench 1/2-inch drive to tighten the castle nut.
• Torque ball joint castle nut to 103 Nm (76 ft-lbs).
• If the cotter pin hole does not line up, tighten the nut slightly more until the slot lines up. Do not loosen the nut to align it.

Step 12: Install the New Cotter Pin

• Insert the new ball joint cotter pin through the hole in the ball joint stud.
• Use needle-nose pliers to bend the cotter pin ends around the castle nut.
• Make sure the cotter pin cannot fall out.

Step 13: Reinstall the Wheel

• Place the wheel back on the hub.
• Install the lug nuts by hand first.
• Use the 21mm lug nut socket and ratchet 1/2-inch drive to snug the lug nuts in a star pattern.

Step 14: Lower and Torque the Wheel

• Use the floor jack (rated 3-ton minimum) to raise the vehicle slightly off the jack stands.
• Remove the jack stands (rated 3-ton minimum).
• Lower the tire to the ground.
• Use the 21mm lug nut socket and torque wrench 1/2-inch drive to tighten the lug nuts in a star pattern.
• Torque wheel lug nuts to 103 Nm (76 ft-lbs).

Step 15: Repeat on the Other Side if Needed

• If replacing both sides, repeat the same procedure on the opposite front wheel.
• Front suspension parts are often best replaced in pairs when wear is similar.

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✅ After Repair

• Turn the steering wheel slowly left and right while parked. Listen for clunks or binding.
• Test drive at low speed first. Check braking, steering feel, and straight-line tracking.
• Recheck the lug nut torque after the first short drive using the 21mm lug nut socket and torque wrench 1/2-inch drive.
• Have a front wheel alignment performed after ball joint replacement. This prevents tire wear and poor steering feel.
• If the ABS, traction control, or hybrid warning lights appear, stop and inspect for disturbed wheel speed sensor wiring.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 for both front lower ball joints, depending on labor rate and alignment pricing

DIY Cost: $90-$250 for parts only, plus any tools you need

You Save: $300-$600 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours including alignment time.

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🎯 Ready to get started?

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