🔧 Outback - Front Lower Control Arm Replacement

This repair replaces the front lower control arms on your Outback. The control arm holds the wheel in position and contains bushings and a ball joint; worn parts can cause clunks, wandering steering, uneven tire wear, or vibration.

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

Assumption: This guide covers the front lower control arms, replaced in pairs.

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⚠️ Safety & Precautions

• ⚠️ Never work under your Outback supported only by a jack; always use jack stands.
• ⚠️ The front suspension is heavy and can shift suddenly when bolts are removed.
• ⚠️ Do not loosen the axle nut or pull the axle outward unless needed; this can damage the front axle or CV joint.
• ⚠️ Do not use an impact tool on the ball joint stud nut if the stud spins.
• ⚠️ After replacement, a professional wheel alignment is required before normal driving.
• ⚠️ Final tightening of the control arm bushing bolts must be done at normal ride height to prevent bushing damage.

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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
• Torque wrench 3/8-inch drive
• 19mm socket
• 17mm socket
• 14mm socket
• 12mm socket
• 19mm wrench
• 17mm wrench
• 14mm wrench
• Ratchet 1/2-inch drive
• Ratchet 3/8-inch drive
• Socket extension 6-inch 1/2-inch drive
• Ball joint separator (specialty)
• Pickle fork ball joint separator (specialty)
• Pry bar 18-inch
• Dead blow hammer 2-lb
• Needle nose pliers
• Paint marker
• Penetrating oil
• Wire brush
• Shop towels
• Measuring tape

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm assembly, left - Qty: 1
• Front lower control arm assembly, right - Qty: 1
• Front lower ball joint pinch bolt and nut - Qty: 2
• Front lower control arm mounting bolts and nuts - Qty: 1 set
• Front sway bar end link nuts - Qty: 2

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📋 Before You Begin

• Park your Outback on flat, solid 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 bolts, ball joint pinch bolt area, and sway bar end link nuts.
• A ball joint separator is a tool that pops the tapered ball joint free from the steering knuckle without hammering directly on the joint.
• A pry bar is a strong lever used to gently move suspension parts into position.
• Plan for a wheel alignment immediately after this repair.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Wheels

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

Step 2: Raise and Support the Front

• Use the floor jack (rated 3-ton minimum) to lift the front of your Outback at the front center jacking point.
• Place jack stands (rated 3-ton minimum) under the approved front side support points.
• Lower the vehicle slowly onto the jack stands.
• Gently shake the vehicle by hand to confirm it is stable.

Step 3: Remove the Front Wheels

• Use a 19mm socket and ratchet 1/2-inch drive to remove the lug nuts.
• Remove both front wheels and set them flat on the ground.
• During installation, wheel lug nuts are tightened to Torque to 120 Nm (89 ft-lbs).

Step 4: Mark the Control Arm Position

• Use a paint marker to mark around the front and rear control arm mounting points.
• This does not replace an alignment, but it helps keep the vehicle close enough for a careful drive to the alignment shop.

Step 5: Disconnect the Front Sway Bar End Link

• The sway bar end link connects the control arm to the sway bar and helps reduce body roll while turning.
• Use a 17mm socket and 17mm wrench to remove the sway bar end link nut from the control arm.
• If the stud spins, hold the stud with the proper wrench surface and remove the nut with the 17mm wrench.
• Move the end link aside carefully.
• During installation, tighten the sway bar end link nut to Torque to 45 Nm (33 ft-lbs).

Step 6: Remove the Ball Joint Pinch Bolt

• The ball joint is the pivot joint between the control arm and the steering knuckle.
• Use a 14mm socket and 14mm wrench to remove the lower ball joint pinch bolt and nut at the steering knuckle.
• Use a wire brush and penetrating oil if the bolt is rusty.
• During installation, tighten the ball joint pinch bolt to Torque to 50 Nm (37 ft-lbs).

Step 7: Separate the Ball Joint from the Steering Knuckle

• Use a ball joint separator (specialty) to separate the ball joint from the steering knuckle.
• If needed, use a pickle fork ball joint separator (specialty), but only if replacing the control arm with a new ball joint included.
• Use a dead blow hammer 2-lb lightly on the separator tool if needed.
• Do not hammer directly on the steering knuckle, axle, or brake rotor.
• Protect the axle boot.

Step 8: Remove the Rear Control Arm Mounting Bolt

• Use a 19mm socket, 19mm wrench, and breaker bar 1/2-inch drive to loosen the rear control arm mounting bolt and nut.
• Remove the rear bolt while supporting the arm with one hand.
• During installation, final-tighten this bolt at ride height to Torque to 140 Nm (103 ft-lbs).

Step 9: Remove the Front Control Arm Mounting Bolt

• Use a 19mm socket, 19mm wrench, and breaker bar 1/2-inch drive to loosen the front control arm mounting bolt and nut.
• Remove the front bolt and guide the control arm out of the subframe.
• Use a pry bar 18-inch only if the arm is stuck in the mounting pocket.
• During installation, final-tighten this bolt at ride height to Torque to 140 Nm (103 ft-lbs).

Step 10: Compare the Old and New Control Arms

• Place the old and new control arms side by side.
• Use a measuring tape to confirm the ball joint location and bushing positions match.
• Make sure the left and right arms are not swapped.
• Match shape before installing.

Step 11: Install the New Control Arm

• Slide the new control arm into the front and rear mounting pockets.
• Use a pry bar 18-inch gently if the bushings need help lining up.
• Install the front and rear bolts by hand first to avoid cross-threading.
• Use a 19mm socket and 19mm wrench to snug the bolts, but do not final-tighten yet.

Step 12: Reconnect the Ball Joint

• Guide the ball joint stud fully into the steering knuckle by hand.
• Use a pry bar 18-inch carefully under the control arm if you need slight upward pressure.
• Install the new ball joint pinch bolt and nut.
• Use a 14mm socket, 14mm wrench, and torque wrench 3/8-inch drive to tighten the pinch bolt to Torque to 50 Nm (37 ft-lbs).

Step 13: Reconnect the Sway Bar End Link

• Place the sway bar end link back into the control arm bracket.
• Install the new nut by hand.
• Use a 17mm socket, 17mm wrench, and torque wrench 3/8-inch drive to tighten the nut to Torque to 45 Nm (33 ft-lbs).

Step 14: Repeat on the Other Side

• Repeat Steps 5 through 13 on the opposite front control arm.
• Use the same tools and torque specs.
• Replace front control arms in pairs for even handling.

Step 15: Load the Suspension to Ride Height

• Use the floor jack (rated 3-ton minimum) under the outer control arm area to gently raise the suspension until the vehicle just begins to lift off the jack stand.
• This simulates normal ride height so the rubber bushings are not twisted when tightened.
• Keep the jack stand in place for safety.

Step 16: Final-Tighten the Control Arm Bolts

• With the suspension loaded, use a 19mm socket, 19mm wrench, and torque wrench 1/2-inch drive to tighten the front control arm bolt to Torque to 140 Nm (103 ft-lbs).
• Use the 19mm socket, 19mm wrench, and torque wrench 1/2-inch drive to tighten the rear control arm bolt to Torque to 140 Nm (103 ft-lbs).
• Repeat this ride-height tightening on the other side.

Step 17: Reinstall the Wheels

• Install both front wheels by hand.
• Use a 19mm socket and ratchet 1/2-inch drive to snug the lug nuts in a star pattern.
• Use the floor jack (rated 3-ton minimum) to lift slightly, remove the jack stands (rated 3-ton minimum), and lower your Outback to the ground.
• Use a 19mm socket and torque wrench 1/2-inch drive to tighten the lug nuts to Torque to 120 Nm (89 ft-lbs).

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✅ After Repair

• ✅ Turn the steering wheel fully left and right while parked and listen for clunks or rubbing.
• ✅ Take a short, slow test drive around the block before highway driving.
• ✅ If the steering wheel is off-center, the vehicle pulls, or the tires squeal, stop driving except to reach an alignment shop.
• ✅ Get a professional four-wheel alignment as soon as possible.
• ✅ Recheck the lug nut torque after 25-50 miles: Torque to 120 Nm (89 ft-lbs).
• ✅ Inspect the ball joint boots and axle boots for any tears after the test drive.

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💰 DIY vs Shop Cost

Shop Cost: $850-$1,400 (parts + labor + alignment)

DIY Cost: $300-$650 (parts only, alignment extra)

You Save: $400-$750 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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