🔧 Focus - Front Ball Joint Replacement

On your Focus, the front lower ball joint is serviced with the complete front lower control arm assembly. That means you replace the lower control arm, which comes with a new ball joint already installed.

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

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⚠️ Safety & Precautions

• ⚠️ Support your Focus with jack stands before removing the wheel or suspension parts.
• ⚠️ Never work on a vehicle held up only by a floor jack.
• ⚠️ The ball joint holds the lower part of the wheel assembly in position. When it separates, parts can move suddenly.
• ⚠️ Do not let the steering knuckle hang by the brake hose or axle shaft.
• ⚠️ Replace the ball joint pinch bolt and nut if supplied with the new arm or if corroded.
• ⚠️ Final-tighten control arm bushing bolts at ride height to avoid damaging the rubber bushings.
• ⚠️ A wheel alignment is required after replacing a lower control arm.
• ⚠️ 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 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• 19mm lug nut socket
• 1/2-inch drive breaker bar
• 1/2-inch drive ratchet
• 3/8-inch drive ratchet
• 1/2-inch drive torque wrench
• 3/8-inch drive torque wrench
• 15mm socket
• 18mm socket
• 21mm socket
• 15mm wrench
• 18mm wrench
• 21mm wrench
• Ball joint separator tool (specialty)
• Pry bar 18-inch
• Ball peen hammer
• Paint marker
• Penetrating oil
• Bungee cord
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower control arm with ball joint - Left: Qty: 1
• Front lower control arm with ball joint - Right: Qty: 1
• Front lower ball joint pinch bolt and nut - Qty: 2
• Front lower control arm mounting bolts - Qty: 6

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📋 Before You Begin

• 🅿️ Park your Focus on flat, solid ground and set the parking brake.
• 🧱 Place wheel chocks behind the rear wheels.
• 💧 Spray penetrating oil on the ball joint pinch bolt and lower control arm mounting bolts.
• 📸 Take a photo of the control arm and bolt positions before removing anything.
• 📌 The steering knuckle is the large metal part behind the brake rotor that holds the wheel hub.
• 📌 The lower control arm is the metal arm that connects the bottom of the wheel area to the vehicle frame/subframe.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Lug Nuts

• Use a 19mm lug nut socket and 1/2-inch drive breaker bar to loosen the front wheel lug nuts about half a turn.
• Keep the tire on the ground while loosening so the wheel does not spin.
• Tip: Loosen only, remove later.

Step 2: Raise and Support the Vehicle

• Use a floor jack rated 2-ton minimum to lift the front of your Focus at the approved front jacking point.
• Place jack stands rated 2-ton minimum under the approved front support points.
• Lower your Focus gently onto the jack stands.
• Shake the vehicle gently by hand to confirm it is stable.

Step 3: Remove the Front Wheel

• Use a 19mm lug nut socket and 1/2-inch drive ratchet to remove the lug nuts.
• Remove the wheel and place it flat under the side of your Focus as a backup safety support.

Step 4: Support the Lower Control Arm

• Place the floor jack rated 2-ton minimum under the outer end of the lower control arm.
• Raise the jack just enough to support the arm. Do not lift the vehicle off the jack stand.

Step 5: Remove the Ball Joint Pinch Bolt

• Locate the ball joint where the lower control arm fits into the bottom of the steering knuckle.
• Use a 15mm socket or 18mm socket with a 3/8-inch drive ratchet to remove the pinch bolt nut.
• Use a 15mm wrench or 18mm wrench to hold the bolt head if it spins.
• Pull the pinch bolt out of the steering knuckle.
• If stuck, apply penetrating oil and gently tap the bolt with a ball peen hammer.

Step 6: Separate the Ball Joint from the Steering Knuckle

• Use a ball joint separator tool to separate the ball joint stud from the steering knuckle.
• A ball joint separator tool is a tool that pushes tight suspension joints apart safely.
• Use a pry bar 18-inch to gently push the lower control arm downward if needed.
• Use a bungee cord to support the steering knuckle so it does not hang by the brake hose or axle.
• Tip: Avoid pulling the axle outward.

Step 7: Mark the Control Arm Position

• Use a paint marker to mark where the lower control arm lines up with the subframe.
• This helps you install the new control arm close to the original position before alignment.

Step 8: Remove the Lower Control Arm Mounting Bolts

• Use an 18mm socket or 21mm socket with a 1/2-inch drive breaker bar to loosen the front control arm mounting bolt.
• Use an 18mm wrench or 21mm wrench if the nut turns on the opposite side.
• Use an 18mm socket or 21mm socket with a 1/2-inch drive breaker bar to loosen the rear control arm mounting bolts.
• Remove all control arm mounting bolts and keep track of their positions.

Step 9: Remove the Old Lower Control Arm

• Use a pry bar 18-inch to gently work the lower control arm out of the subframe pockets.
• Remove the arm by hand once it is loose.
• Compare the old arm to the new front lower control arm with ball joint before installation.

Step 10: Install the New Lower Control Arm

• Slide the new lower control arm into the subframe pockets by hand.
• Install the new mounting bolts by hand first to prevent cross-threading.
• Use an 18mm socket or 21mm socket with a 1/2-inch drive ratchet to snug the bolts only.
• Do not fully tighten the inner bolts yet.

Step 11: Seat the Ball Joint in the Steering Knuckle

• Use the floor jack rated 2-ton minimum to gently raise the lower control arm until the ball joint stud slides fully into the steering knuckle.
• Install the new ball joint pinch bolt and nut by hand.
• Use a 15mm socket or 18mm socket with a 3/8-inch drive torque wrench, while holding the bolt head with a 15mm wrench or 18mm wrench.
• Tighten the ball joint pinch bolt to Torque to 63 Nm (46 ft-lbs).

Step 12: Set the Control Arm Near Ride Height

• Use the floor jack rated 2-ton minimum under the outer end of the lower control arm.
• Raise the control arm until it sits close to its normal road position.
• Ride height means the suspension position when your Focus is sitting on its wheels.
• Tip: This prevents bushing twist.

Step 13: Torque the Control Arm Mounting Bolts

• Use an 18mm socket or 21mm socket with a 1/2-inch drive torque wrench to tighten the front control arm mounting bolt to Torque to 115 Nm (85 ft-lbs).
• Use an 18mm socket or 21mm socket with a 1/2-inch drive torque wrench to tighten the rear control arm mounting bolts to Torque to 115 Nm (85 ft-lbs).

Step 14: Reinstall the Wheel

• Place the wheel back onto the hub by hand.
• Start all lug nuts by hand.
• Use a 19mm lug nut socket and 1/2-inch drive ratchet to snug the lug nuts in a star pattern.

Step 15: Lower the Vehicle and Torque the Lug Nuts

• Use the floor jack rated 2-ton minimum to lift your Focus slightly off the jack stand.
• Remove the jack stands rated 2-ton minimum.
• Lower your Focus fully to the ground.
• Use a 19mm lug nut socket and 1/2-inch drive torque wrench to tighten the lug nuts to Torque to 135 Nm (100 ft-lbs).

Step 16: Repeat on the Other Side if Needed

• Repeat the same process on the opposite side if replacing both front lower control arms.
• Replace both sides if both ball joints are loose, boots are torn, or tire wear is uneven on both front tires.

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✅ After Repair

• ✅ Turn the steering wheel fully left and right while parked. Listen for clunks or rubbing.
• ✅ Take a slow test drive and stop immediately if steering feels loose or unstable.
• ✅ Recheck lug nut torque with a 19mm lug nut socket and 1/2-inch drive torque wrench.
• ✅ Get a wheel alignment as soon as possible after replacing the lower control arm.
• ✅ After alignment, confirm your Focus drives straight and the steering wheel is centered.

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💰 DIY vs Shop Cost

Shop Cost: $550-$950 (parts + labor)

DIY Cost: $160-$380 (parts only)

You Save: $390-$570 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-3.5 hours plus alignment time.

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🎯 Ready to get started?

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