🔧 Control Arms - Front Lower Control Arm Replacement

Assumption: this is for the front lower control arms on your Yaris. The control arm holds the wheel assembly in place and helps the car steer straight and ride smoothly. If the bushings are torn or the ball joint is loose, the whole arm is usually replaced as an assembly.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• Work on level ground with the parking brake set and wheel chocks in place.
• Support the car with jack stands; never rely on a jack alone.
• The front suspension will be unloaded when the arm is removed, so keep hands clear of pinch points.
• If the ball joint is separated, the knuckle can move suddenly.
• No battery disconnect is required for 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
• Ratchet
• Socket set, metric
• 19mm socket
• 21mm socket
• 22mm socket
• Torque wrench
• Breaker bar
• Ball joint separator (specialty)
• Penetrating oil
• Paint marker
• Flat screwdriver

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm assembly - Replace in pairs if one side is worn - Qty: 1 or 2
• Front lower control arm hardware kit - Qty: 1
• Front wheel alignment - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Loosen the front wheel lug nuts before lifting the car.
• Spray penetrating oil on the control arm bolts and ball joint nut before starting.
• Mark the cam bolt positions with a paint marker if your arm uses adjustable alignment bolts.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and support the front of the car

• Use a floor jack to lift the front of the Yaris at the approved jacking point.
• Set the car securely on jack stands.
• Remove the front wheel with the lug wrench or 21mm socket.

Step 2: Free the ball joint from the steering knuckle

• Use a 19mm or 21mm socket to remove the ball joint nut.
• Use a ball joint separator to separate the ball joint stud from the knuckle.
• Do not hammer on the stud.

Step 3: Remove the control arm bolts

• Use a 21mm or 22mm socket and breaker bar to remove the rear bushing bolt and the front pivot bolt.
• If the bolts are tight, keep the arm supported with one hand while loosening them.
• Remove the control arm from the subframe.

Step 4: Install the new control arm

• Position the new control arm into the subframe mounts by hand.
• Start both mounting bolts by hand first using the ratchet and appropriate socket.
• Insert the ball joint stud into the knuckle and install the nut by hand.
• Tighten all fasteners to factory specification.

Step 5: Final tighten with the suspension at ride height

• Support the lower arm with a floor jack until it is near normal ride height.
• Use the torque wrench to final-tighten the control arm pivot bolts at ride height.
• Torque to factory specification for the pivot bolts and ball joint nut.
• Final torque at ride height protects the bushings.

Step 6: Reinstall the wheel and lower the car

• Reinstall the wheel and tighten the lug nuts by hand with the ratchet.
• Lower the car off the jack stands with the floor jack.
• Use the torque wrench to torque the lug nuts to factory specification in a star pattern.

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✅ After Repair

• Check that the steering wheel is centered and the car tracks straight.
• Listen for clunks or pops during a slow test drive.
• Get a professional front-end alignment right away.
• If you replaced only one side, inspect the other side soon.

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💰 DIY vs Shop Cost

Shop Cost: $450-$900 (parts + labor)

DIY Cost: $120-$280 (parts only)

You Save: $330-$620 by doing it yourself!

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

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🎯 Ready to get started?

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