🔧 Highlander - Front Lower Control Arm Replacement

This repair replaces the front lower control arm, which connects the wheel hub area to the vehicle frame and lets the suspension move safely. On your Highlander, the control arm includes rubber bushings and a ball joint connection; worn parts can cause clunks, wandering steering, uneven tire wear, or failed alignment.

Difficulty Level: Advanced | Estimated Time: 3-5 hours per side

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⚠️ Safety & Precautions

• ⚠️ Work only on a flat, solid surface and support your Highlander with jack stands before going underneath.
• ⚠️ Never rely on a floor jack alone; a floor jack lifts the vehicle, but jack stands hold it safely.
• ⚠️ The front lower control arm is under suspension load, so keep your hands clear when separating the ball joint and lowering parts.
• ⚠️ Do not hammer directly on the ball joint stud or steering knuckle; damage can make the vehicle unsafe.
• ⚠️ Final tightening of control arm bushing bolts must be done at normal ride height to avoid tearing the new bushings.
• ⚠️ A wheel alignment is required after this repair.

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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
• Safety glasses
• Mechanic gloves
• Breaker bar 1/2-inch drive
• Torque wrench 1/2-inch drive
• Ratchet 1/2-inch drive
• Ratchet 3/8-inch drive
• 21mm socket
• 19mm socket
• 17mm socket
• 14mm socket
• 10mm socket
• 21mm wrench
• 19mm wrench
• 17mm wrench
• 14mm wrench
• Needle-nose pliers
• Ball joint separator (specialty)
• Pry bar 24-inch
• Dead blow hammer
• Paint marker
• Penetrating oil

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm assembly - Qty: 1 per side
• Front lower ball joint cotter pin - Qty: 1 per side
• Front lower control arm mounting hardware - Qty: 1 kit per side
• Front stabilizer bar link nut - Qty: 1 per side if removed

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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.
• 🔍 Compare the new control arm to the old side before removal. Make sure the shape, bushing positions, and ball joint location match.
• 💧 Spray penetrating oil on the control arm bolts, ball joint nut, and stabilizer link nut before starting.
• 🧭 Mark the bolt positions with a paint marker before removal. This helps keep alignment close enough to drive to the alignment shop.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Wheel Lug Nuts

• Use a 21mm socket and breaker bar 1/2-inch drive to loosen the front wheel lug nuts one turn while the tire is still on the ground.
• Do not remove the lug nuts yet.
• Loosen first, lift second.

Step 2: Lift and Support the Front of the Vehicle

• Use a floor jack (rated 3-ton minimum) under the front center jacking point to raise your Highlander.
• Place jack stands (rated 3-ton minimum) under the front side support points.
• Slowly lower the vehicle onto the jack stands and gently shake the vehicle to confirm it is stable.

Step 3: Remove the Front Wheel

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

Step 4: Remove Any Splash Shield Fasteners Blocking Access

• Use a 10mm socket and ratchet 3/8-inch drive to remove small splash shield bolts if they block the control arm mounting bolts.
• Set the fasteners aside in order so they go back in the same places.

Step 5: Disconnect the Stabilizer Bar Link from the Control Arm if Needed

• The stabilizer bar link connects the suspension arm to the anti-roll bar, which helps reduce body lean in turns.
• Use a 17mm socket and ratchet 1/2-inch drive to remove the stabilizer bar link nut from the lower control arm if it attaches to or blocks the arm.
• If the stud spins, hold it with a 17mm wrench while removing the nut with the 17mm socket.

Step 6: Remove the Ball Joint Cotter Pin and Nut

• A cotter pin is a small bent locking pin that keeps the nut from loosening.
• Use needle-nose pliers to straighten and pull out the cotter pin from the lower ball joint stud.
• Use a 19mm socket and ratchet 1/2-inch drive to loosen and remove the lower ball joint nut.
• If the nut is tight, use a breaker bar 1/2-inch drive with the 19mm socket.

Step 7: Separate the Ball Joint from the Steering Knuckle

• The steering knuckle is the metal part that holds the wheel hub and connects to the suspension.
• Use a ball joint separator (specialty) to separate the lower ball joint from the steering knuckle.
• Support the knuckle by hand as it separates so it does not pull on the brake hose or ABS wire.
• Use a dead blow hammer only on the separator tool if extra force is needed.
• Protect the brake hose.

Step 8: Mark the Control Arm Mounting Positions

• Use a paint marker to mark the position of the front and rear control arm mounting bolts and washers before removing them.
• This does not replace an alignment, but it helps keep the vehicle drivable afterward.

Step 9: Remove the Front Control Arm Mounting Bolt

• Use a 19mm socket and ratchet 1/2-inch drive on the bolt head.
• Use a 19mm wrench on the nut if the nut turns.
• Remove the front mounting bolt and nut.

Step 10: Remove the Rear Control Arm Mounting Bolt

• Use a 21mm socket and breaker bar 1/2-inch drive to loosen the rear control arm mounting bolt.
• Use a 21mm wrench if the nut must be held from the opposite side.
• Remove the rear mounting bolt and nut.

Step 11: Remove the Control Arm

• Use a pry bar 24-inch to gently work the control arm out of the subframe pockets.
• Do not pry against brake lines, ABS wiring, or the axle boot.
• Lower the control arm out of the vehicle.

Step 12: Install the New Control Arm

• Position the new front lower control arm assembly into the subframe pockets by hand.
• Use a pry bar 24-inch only if light alignment pressure is needed.
• Install the front and rear control arm bolts by hand first to avoid cross-threading.
• Snug the bolts with a 19mm socket, 21mm socket, and ratchet 1/2-inch drive, but do not final-tighten yet.

Step 13: Reconnect the Ball Joint

• Guide the ball joint stud into the steering knuckle by hand.
• Install the ball joint nut by hand.
• Use a 19mm socket and torque wrench 1/2-inch drive to tighten the ball joint nut to Torque to 103 Nm (76 ft-lbs).
• Install a new front lower ball joint cotter pin using needle-nose pliers. If the hole does not line up, tighten the nut slightly until it does.

Step 14: Reconnect the Stabilizer Bar Link if Removed

• Install the stabilizer bar link into the control arm by hand.
• Use a 17mm socket, 17mm wrench, and torque wrench 1/2-inch drive to tighten the stabilizer link nut to Torque to 74 Nm (55 ft-lbs).

Step 15: Reinstall Splash Shield Fasteners

• Use a 10mm socket and ratchet 3/8-inch drive to reinstall any splash shield bolts removed earlier.
• Tighten them snug only; small shield bolts can strip if overtightened.

Step 16: Load the Suspension Before Final Tightening

• Control arm bushings are rubber mounts that twist as the suspension moves.
• Use a floor jack (rated 3-ton minimum) under the outer control arm area to raise the suspension until it sits near normal ride height.
• Do not lift the vehicle off the jack stand while doing this.
• Final-tighten at ride height.

Step 17: Final-Tighten the Control Arm Mounting Bolts

• Use a 19mm socket, 21mm socket, 19mm wrench, 21mm wrench, and torque wrench 1/2-inch drive to tighten the control arm mounting bolts.
• Tighten the front control arm mounting bolt to Torque to 150 Nm (111 ft-lbs).
• Tighten the rear control arm mounting bolt to Torque to 180 Nm (133 ft-lbs).

Step 18: Reinstall the Wheel

• Install the wheel by hand and start all lug nuts by hand.
• Use a 21mm socket and ratchet 1/2-inch drive to snug the lug nuts in a star pattern.

Step 19: Lower the Vehicle and Torque the Lug Nuts

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

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✅ After Repair

• ✅ Turn the steering wheel lock-to-lock while parked and listen for rubbing, clunks, or binding.
• ✅ Test drive slowly at first. Listen for suspension noise over small bumps.
• ✅ Recheck that the cotter pin is installed and all fasteners are tight after the test drive.
• ✅ Get a professional wheel alignment as soon as possible. Driving without alignment can quickly wear out tires.
• ✅ If both control arms are worn, replace both sides as a pair for even handling.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,100 per side (parts + labor + alignment)

DIY Cost: $180-$400 per side (parts only, alignment extra)

You Save: $350-$650 per side by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3 hours per side.

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🎯 Ready to get started?

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