🔧 Outback - Front Lower Control Arm Replacement

This repair replaces the front lower control arms, which connect the front suspension to the body and hold the wheel in the correct position. On your Outback, worn control arm bushings or ball joints can cause clunks, wandering steering, uneven tire wear, or vibration while braking.

Difficulty Level: Intermediate | Estimated Time: 3-5 hours

Assumption: This guide covers the front lower control arms, replaced as a left/right pair.

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⚠️ Safety & Precautions

• ⚠️ Support your Outback with jack stands before working underneath it. Never rely on a floor jack alone.
• ⚠️ The front coil spring is under load, but you do not need to remove the strut or spring for this job.
• ⚠️ Do not hammer directly on the ball joint stud threads. Damage can make the nut unsafe to reinstall.
• ⚠️ Final tightening of control arm bushing bolts must be done at normal ride height. This prevents twisting and early bushing failure.
• ⚠️ An alignment is required after replacing control arms.
• ⚠️ Battery disconnect is not 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
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench
• 3/8-inch drive ratchet
• 14mm socket
• 17mm socket
• 19mm socket
• 21mm socket
• 14mm wrench
• 17mm wrench
• 19mm wrench
• Needle-nose pliers
• Ball joint separator (specialty)
• Dead blow hammer
• Pry bar
• Paint marker
• Penetrating oil
• Wire brush

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm assembly - Left: 1, Right: 1
• Front lower control arm ball joint pinch bolt and nut - Qty: 2
• Front lower control arm mounting bolts and nuts - Qty: 4
• Stabilizer bar end link nuts - Qty: 2
• Anti-seize compound - Qty: 1

Note: Replace front control arms in pairs so handling and alignment stay even side to side.

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📋 Before You Begin

• 🚗 Park your Outback on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• 🔩 Loosen the front wheel lug nuts slightly before lifting the vehicle.
• 🧴 Spray penetrating oil on the control arm mounting bolts, ball joint pinch bolt, and sway bar end link nut.
• 📌 A ball joint separator is a tool that safely separates the ball joint from the steering knuckle without damaging the joint bore.
• 📌 A torque wrench is a tool that tightens bolts to an exact force so parts are secure without being over-tightened.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Wheel Lug Nuts

• Use a 19mm socket and 1/2-inch drive breaker bar to loosen each front lug nut about half a turn.
• Do not remove the lug nuts yet.
• Tip: Loosen wheels before lifting.

Step 2: Raise and Support the Front

• Use the floor jack to lift the front of your Outback at the front center jacking point.
• Place jack stands under the front pinch welds or front subframe support points.
• Gently lower the vehicle onto the jack stands.
• Shake the vehicle lightly to confirm it is stable before going underneath.

Step 3: Remove the Front Wheels

• Use the 19mm socket to remove the loosened lug nuts.
• Remove both front wheels and set them flat aside.

Step 4: Mark the Original Control Arm Position

• Use a paint marker to mark around the front and rear control arm mounting points.
• This helps you install the new arm close to the original position before alignment.
• Tip: Alignment is still required.

Step 5: Disconnect the Stabilizer Bar End Link

• Use a 14mm socket and 14mm wrench to remove the stabilizer bar end link nut from the control arm.
• If the end link stud spins, hold the stud with the correct wrench while turning the nut with the 14mm wrench.
• Move the end link aside gently.

Step 6: Remove the Ball Joint Pinch Bolt

• Use a 14mm socket and 14mm wrench to remove the ball joint pinch bolt and nut from the steering knuckle.
• The steering knuckle is the metal part that holds the wheel hub and connects to the suspension.
• Use a wire brush and penetrating oil if the bolt is rusty.

Step 7: Separate the Ball Joint from the Knuckle

• Use a ball joint separator to separate the ball joint from the steering knuckle.
• If needed, use a dead blow hammer to tap the control arm downward while applying pressure with the separator.
• Do not strike the axle, brake hose, or ball joint stud threads.

Step 8: Remove the Front Control Arm Mounting Bolt

• Use a 17mm socket and 17mm wrench to remove the front control arm mounting bolt and nut.
• Keep track of bolt direction for reassembly.

Step 9: Remove the Rear Control Arm Mounting Bolt

• Use a 19mm socket and 19mm wrench to remove the rear control arm mounting bolt and nut.
• Support the arm with one hand while removing the last bolt.
• Use a pry bar gently if the bushing sleeve is stuck in the bracket.

Step 10: Remove the Old Control Arm

• Pull the old control arm out of the subframe brackets by hand.
• Use a pry bar only on the metal bushing sleeve area if extra movement is needed.
• Compare the old and new control arms to confirm the shape, bushing locations, and ball joint position match.

Step 11: Install the New Control Arm

• Position the new control arm into the front and rear mounting brackets.
• Install the front and rear mounting bolts by hand first.
• Use a 17mm socket, 17mm wrench, 19mm socket, and 19mm wrench to snug the bolts only.
• Do not fully tighten the bushing bolts while the suspension is hanging.

Step 12: Insert the Ball Joint into the Knuckle

• Guide the ball joint stud into the steering knuckle by hand.
• Use a floor jack under the outer control arm to raise it slightly if needed.
• Make sure the ball joint stud seats fully in the knuckle slot.

Step 13: Install the Ball Joint Pinch Bolt

• Install a new ball joint pinch bolt and nut by hand.
• Use a 14mm socket, 14mm wrench, and torque wrench to tighten the pinch bolt.
• Torque to 50 Nm (37 ft-lbs)

Step 14: Reconnect the Stabilizer Bar End Link

• Install the stabilizer bar end link into the new control arm.
• Use a 14mm socket, 14mm wrench, and torque wrench to tighten the nut.
• Torque to 45 Nm (33 ft-lbs)

Step 15: Repeat on the Other Side

• Use the same tools and steps to replace the opposite front lower control arm.
• Keep the bolts only snug until the vehicle is at normal ride height.

Step 16: Set the Suspension at Ride Height

• Reinstall both front wheels by hand using the lug nuts.
• Use the floor jack to raise the vehicle slightly, remove the jack stands, and lower the vehicle onto ramps or onto the ground.
• If working on the ground, carefully reach the mounting bolts only if there is safe access.
• Do not crawl under a vehicle unless it is safely supported.

Step 17: Final-Tighten the Control Arm Mounting Bolts

• With the suspension at normal ride height, use a 17mm socket, 17mm wrench, 19mm socket, 19mm wrench, and torque wrench to tighten the control arm mounting bolts.
• Front control arm mounting bolt: Torque to 95 Nm (70 ft-lbs)
• Rear control arm mounting bolt: Torque to 140 Nm (103 ft-lbs)
• Tip: Ride-height tightening protects bushings.

Step 18: Torque the Wheels

• Use a 19mm socket and torque wrench to tighten the wheel lug nuts in a star pattern.
• Torque to 120 Nm (89 ft-lbs)

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✅ After Repair

• ✅ Turn the steering wheel left and right to make sure nothing binds or rubs.
• ✅ Test drive slowly first. Listen for clunks, pops, or steering pull.
• ✅ Schedule a 4-wheel alignment immediately after the repair.
• ✅ Recheck all accessible fasteners after the first short drive.
• ✅ If the steering wheel is off-center or the vehicle pulls, avoid highway driving until aligned.

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💰 DIY vs Shop Cost

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

DIY Cost: $220-$500 (parts only, alignment extra)

You Save: $350-$600 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2.5-4.0 hours.

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