🔧 BRZ - Front Lower Ball Joint Replacement

The front lower ball joints connect the lower control arm to the steering knuckle and allow the wheel to steer and move up/down smoothly. If they’re loose or torn, you can get clunks, wandering steering, and uneven tire wear.

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

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⚠️ Safety & Precautions

• ⚠️ Support the car on jack stands—never rely on a jack.
• ⚠️ Keep hands clear when separating the joint; it can “pop” loose suddenly.
• ⚠️ Do not pull or twist the ABS wheel speed sensor wire near the knuckle.
• ⚠️ If you use a pickle fork, it can tear the boot (OK if you’re replacing the joint).
• ⚠️ 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
• 17mm socket
• Breaker bar 1/2"
• Torque wrench 10-200 N·m
• 14mm socket
• 17mm socket
• 14mm wrench
• 17mm wrench
• Needle-nose pliers
• Hammer (16 oz)
• Ball joint separator tool (specialty)
• Pickle fork separator (specialty)
• Pry bar (18")
• Wire brush
• Penetrating oil

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front lower ball joint - Replace in pairs (left + right) - Qty: 2
• Cotter pins (ball joint stud) - Qty: 2
• Ball joint pinch bolt and nut - Replace if corroded/damaged - Qty: 2

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📋 Before You Begin

• Park on level ground, put the transmission in 1st gear, and set the parking brake.
• Chock both rear wheels with wheel chocks.
• Crack the front lug nuts loose with a 17mm socket and breaker bar before lifting.
• Plan on getting an alignment afterward (ball joint work can change alignment).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and remove the front wheel

• Use a floor jack to lift the front at the proper jacking point.
• Set the car down onto jack stands.
• Remove the wheel using a 17mm socket.

Step 2: Locate the lower ball joint and soak fasteners

• Find the ball joint at the bottom of the steering knuckle (right behind the brake rotor).
• Spray penetrating oil on the pinch bolt area and the ball joint stud nut area.
• Use a wire brush to clean exposed threads so nuts come off smoothly.
• Let penetrating oil soak 5–10 minutes.

Step 3: Remove the cotter pin and loosen the ball joint stud nut

• Straighten and remove the cotter pin using needle-nose pliers.
• Loosen and remove the ball joint stud nut using a 17mm socket (hold with a 17mm wrench if needed).

Step 4: Remove the ball joint pinch bolt from the knuckle

• Remove the pinch bolt/nut at the ball joint clamp area on the knuckle using a 14mm socket and 14mm wrench.
• Tap the bolt out gently with a hammer if it’s stuck.

Step 5: Separate the ball joint from the lower control arm

• Install a ball joint separator tool (specialty) between the control arm and the ball joint stud, then tighten until the stud pops free.
• If you don’t have that tool, use a pickle fork separator (specialty) and a hammer to drive it in until it separates.
• Keep the knuckle supported by hand.

Step 6: Remove the ball joint from the steering knuckle

• With the pinch bolt removed, wiggle and pull the ball joint housing out of the knuckle by hand.
• If it’s stuck, use a pry bar (18") carefully between the ball joint flange area and knuckle and work it out.
• Use a hammer to tap the knuckle ear lightly (do not hit the stud threads).

Step 7: Install the new ball joint into the knuckle

• Clean the ball joint bore in the knuckle with a wire brush.
• Slide the new ball joint housing fully into the knuckle by hand (it must seat squarely).
• Reinstall the pinch bolt and nut using a 14mm socket and 14mm wrench.
• Torque to 52 Nm (38 ft-lbs)

Step 8: Attach the ball joint stud to the lower control arm

• Guide the stud into the control arm and install the nut by hand first.
• Tighten using a 17mm socket.
• Torque to 49 Nm (36 ft-lbs)
• Install a new cotter pin using needle-nose pliers (tighten the nut slightly more only if needed to align the cotter hole).

Step 9: Reinstall the wheel

• Reinstall the wheel and hand-thread the lug nuts.
• Lower the car off the jack stands using the floor jack.
• Tighten lug nuts in a star pattern with a torque wrench.
• Torque to 120 Nm (89 ft-lbs)

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✅ After Repair

• Turn the steering wheel lock-to-lock while parked and listen for any clunks.
• Test drive at low speed first, then highway speed, and re-check for noise.
• Get a professional wheel alignment as soon as possible.
• Recheck lug nut torque with a torque wrench after 25-50 miles.

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💰 DIY vs Shop Cost

Shop Cost: $350-$700 (parts + labor)

DIY Cost: $80-$220 (parts only)

You Save: $270-$480 by doing it yourself!

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

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🎯 Ready to get started?

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