🔧 Tucson - Front Lower Control Arm Replacement

This repair replaces the front lower control arms on your Tucson. The lower control arm connects the front wheel hub area to the vehicle body, and worn bushings or ball joints can cause clunking, wandering steering, uneven tire wear, or poor alignment.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours for both sides

---

⚠️ Safety & Precautions

• ⚠️ Support your Tucson with jack stands before working underneath. Never rely on a floor jack alone.
• ⚠️ Work on level, solid ground and chock the rear wheels.
• ⚠️ The front suspension is heavy. Keep hands clear when separating the ball joint.
• ⚠️ Do not hammer directly on the threaded ball joint stud. Damaged threads can make the vehicle unsafe.
• ⚠️ Final tightening of control arm bushing bolts should be done at normal ride height to prevent bushing twist and early failure.
• ⚠️ An alignment is required after replacement.

---

🔧 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
• 19mm lug nut socket
• Breaker bar 1/2-inch drive
• Ratchet 1/2-inch drive
• Ratchet 3/8-inch drive
• 17mm socket
• 19mm socket
• 21mm socket
• 17mm wrench
• 19mm wrench
• Torque wrench 1/2-inch drive
• Ball joint separator (specialty)
• Pickle fork ball joint separator (specialty)
• Dead blow hammer
• Pry bar 18-inch
• Needle-nose pliers
• Paint marker
• Penetrating oil spray

---

🔩 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
• Lower ball joint nut - Qty: 2
• Control arm mounting bolts and nuts - Qty: 1 kit
• Cotter pins - Qty: 2

Replace in pairs: For best handling and alignment, replace both front lower control arms together.

---

📋 Before You Begin

• Park your Tucson on level ground.
• Set the parking brake and place wheel chocks behind the rear tires.
• Loosen the front lug nuts slightly before lifting the vehicle.
• Spray penetrating oil on the control arm mounting bolts and ball joint nut. Let it soak for 10-15 minutes.
• A ball joint separator is a tool that separates the tapered ball joint stud from the steering knuckle without damaging nearby parts.
• A cotter pin is a small bent safety pin that prevents a castle nut from loosening.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Front Wheel Lug Nuts

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

Step 2: Raise and Support the Front of the Vehicle

• Use the floor jack (rated 3-ton minimum) to lift the front of your Tucson at the front center jacking point.
• Place jack stands (rated 3-ton minimum) under the approved front side support points.
• Lower the vehicle gently onto the jack stands.
• Keep the floor jack nearby as a secondary support, but do not work under a vehicle supported only by the jack.

Step 3: Remove the Front Wheels

• Use the 19mm lug nut socket and ratchet 1/2-inch drive to remove the lug nuts.
• Remove both front wheels and set them flat under the side of the vehicle as an extra safety backup.

Step 4: Mark the Control Arm Position

• Use a paint marker to mark the position of the control arm mounting washers and brackets.
• This helps keep the vehicle close enough to drive carefully to an alignment shop.
• Marks do not replace alignment.

Step 5: Remove the Lower Ball Joint Cotter Pin and Nut

• Use needle-nose pliers to straighten and remove the cotter pin from the lower ball joint stud.
• Use a 17mm socket or 19mm socket with the ratchet 1/2-inch drive to remove the lower ball joint nut.
• If the nut is tight, use the breaker bar 1/2-inch drive.
• Discard the old cotter pin.

Step 6: Separate the Lower Ball Joint from the Steering Knuckle

• Use the ball joint separator (specialty) to separate the lower ball joint from the steering knuckle.
• If using a pickle fork ball joint separator (specialty), tap it with a dead blow hammer until the joint releases.
• A pickle fork usually damages the ball joint boot, which is okay if the control arm assembly is being replaced.
• Support the steering knuckle by hand so it does not pull on the axle or brake hose.

Step 7: Remove the Rear Control Arm Mounting Bolt

• Use a 19mm socket and ratchet 1/2-inch drive on the bolt head.
• Use a 19mm wrench to hold the nut if it spins.
• Remove the rear control arm mounting bolt and nut.

Step 8: Remove the Front Control Arm Mounting Bolt

• Use a 21mm socket and breaker bar 1/2-inch drive to loosen the front control arm mounting bolt.
• Use a 21mm socket and ratchet 1/2-inch drive to remove the bolt fully.
• If access is tight, move slowly and keep the socket fully seated to avoid rounding the bolt head.

Step 9: Remove the Old Control Arm

• Use an 18-inch pry bar to gently work the control arm out of the subframe pockets.
• Pull the control arm down and away from the vehicle.
• Compare the old and new control arms before installation. The shape, bushing positions, and ball joint direction must match.

Step 10: Install the New Control Arm

• Guide the new control arm into the subframe pockets by hand.
• Use the 18-inch pry bar only as needed to line up the bolt holes.
• Install the front and rear mounting bolts by hand first. Do not fully tighten yet.
• Hand-starting bolts helps prevent cross-threading, which means damaging the threads by forcing the bolt in crooked.

Step 11: Connect the Lower Ball Joint

• Insert the lower ball joint stud into the steering knuckle.
• Install the new lower ball joint nut by hand.
• Use a 17mm socket or 19mm socket with the torque wrench 1/2-inch drive to tighten the ball joint nut to Torque to 59-78 Nm (44-58 ft-lbs).
• Install a new cotter pin using needle-nose pliers. If the hole does not line up, tighten the nut slightly until it does. Never loosen it to align the cotter pin.

Step 12: Lightly Snug the Control Arm Bolts

• Use the 19mm socket, 21mm socket, 19mm wrench, and ratchet 1/2-inch drive to snug the control arm mounting bolts.
• Do not final-torque the bushing bolts while the suspension is hanging.
• Final torque at ride height.

Step 13: Repeat on the Other Side

• Repeat Steps 5-12 on the opposite front lower control arm.
• Use the same tools and the same safety steps.

Step 14: Reinstall the Wheels

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

Step 15: Load the Suspension for Final Tightening

• Use the floor jack (rated 3-ton minimum) to raise the vehicle slightly and remove the jack stands.
• Lower your Tucson until the tires are on the ground and the suspension is carrying the vehicle weight.
• If bolt access is limited, use the floor jack (rated 3-ton minimum) under the lower control arm near the ball joint to raise the arm to normal ride height while the vehicle remains safely supported on jack stands (rated 3-ton minimum).

Step 16: Final-Torque the Control Arm Mounting Bolts

• Use the 19mm socket, 21mm socket, 19mm 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 156-176 Nm (115-130 ft-lbs).
• Tighten the rear control arm mounting bolt to Torque to 137-157 Nm (101-116 ft-lbs).

Step 17: Torque the Lug Nuts

• Use the 19mm lug nut socket and torque wrench 1/2-inch drive to tighten the lug nuts in a star pattern.
• Tighten each lug nut to Torque to 88-108 Nm (65-80 ft-lbs).

---

✅ After Repair

• ✅ Bounce the front of your Tucson gently a few times to settle the suspension.
• ✅ Check that both cotter pins are installed and bent over securely.
• ✅ Look behind both front wheels and confirm the brake hoses and ABS wires are not stretched, twisted, or rubbing.
• ✅ Test drive slowly at first. Listen for clunks, pops, or rubbing noises.
• ✅ Get a four-wheel alignment as soon as possible. AWD vehicles need correct alignment to protect tires and driveline components.
• ✅ Recheck lug nut torque after 25-50 miles.

---

💰 DIY vs Shop Cost

Shop Cost: $650-$1,050 (parts + labor + alignment)

DIY Cost: $220-$450 (parts only, alignment extra)

You Save: $300-$600 by doing it yourself!

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

---

🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.