Replace the upper control arm ball joint on a 2018-2024 Toyota Camry 2.5L I4. This procedure involves separating the upper ball joint from the steering knuckle and replacing it with a new assembly.

Warnings

Tools required

Parts

• Upper ball joint assembly × 1 — Use OEM specification
• Cotter pin × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and engage parking brake
2. Loosen wheel lug nuts while vehicle is on ground
3. Lift front of vehicle with floor jack at manufacturer-designated jacking points
4. Support vehicle securely on jack stands under frame rails
5. Remove wheel and tire assembly
6. Clean area around upper ball joint and steering knuckle with wire brush to remove dirt and corrosion

Procedure

1. 1

   Remove cotter pin from ball joint nut
   Locate the upper ball joint castle nut on top of the steering knuckle. Use needle nose pliers to straighten and remove the cotter pin. Discard the old cotter pin as it cannot be reused.
2. 2

   Loosen ball joint castle nut
   Using a 19mm socket, loosen but do not fully remove the ball joint castle nut. Leave the nut threaded on by 2-3 turns to protect threads and prevent the knuckle from dropping when the ball joint releases.
3. 3

   Separate ball joint from steering knuckle
   Insert a ball joint separator tool or pickle fork between the upper control arm and steering knuckle at the ball joint taper. Strike the tool firmly with a hammer or use the mechanical separator to break the taper. Once the taper breaks free, remove the castle nut completely.
   ⚠️Keep hands and body clear of the knuckle assembly when separating the ball joint as it may drop suddenly.
4. 4

   Support steering knuckle
   Once the ball joint is separated, support the steering knuckle and brake assembly with a bungee cord or wire to prevent stress on the brake hose and ABS sensor wiring. Do not let the knuckle hang freely.
5. 5

   Remove old ball joint from control arm
   If the ball joint is pressed into the upper control arm, mark the orientation of the ball joint before removal. Use an appropriate ball joint press tool or take the control arm to a machine shop for press-out service. If the ball joint is bolted on, remove the mounting bolts. Clean the mounting area thoroughly.
6. 6

   Install new ball joint
   Install the new ball joint into the upper control arm using a ball joint press tool, ensuring proper alignment and orientation matching your earlier marks. If bolted design, install new mounting bolts and torque per manufacturer specifications. Verify the ball joint stud moves freely and boot is not damaged.
7. 7

   Reinstall ball joint into steering knuckle
   Remove the support from the steering knuckle. Align the ball joint stud with the hole in the top of the steering knuckle. Insert the stud through the knuckle. Thread the new castle nut onto the ball joint stud by hand to ensure threads are not cross-threaded.
8. 8

   Torque ball joint nut and install cotter pin
   Using a torque wrench and 19mm socket, torque the ball joint castle nut to specification. If the cotter pin hole does not align with a castle slot, tighten the nut further (never loosen) until alignment is achieved. Install a new cotter pin through the castle nut and stud, then bend the ends to secure.
   ⚠Never loosen the castle nut to align cotter pin holes. Only tighten further within 1/6 turn maximum.
   Torque spec

   Ball Joint Nut88 Nm (65 lb-ft)
9. 9

   Reinstall wheel and lower vehicle
   Install the wheel and tire assembly. Thread lug nuts by hand to prevent cross-threading. Lower the vehicle until the tire just contacts the ground but weight is still on jack stands. Torque lug nuts in a star pattern to specification using a torque wrench.
   Torque spec

   Wheel Lug Nuts136 Nm (100 lb-ft)
10. 10

    Final torque verification
    Fully lower the vehicle to the ground and remove jack stands. With vehicle weight on suspension, perform a final verification of the ball joint castle nut torque. Rock the vehicle slightly to settle the suspension before final checks.

Reassembly

1. Ensure all fasteners are torqued to specification
2. Verify new cotter pin is properly installed and bent to prevent removal
3. Check that no tools or parts were left in the wheel well
4. Verify steering knuckle moves freely through full range of motion

Verification

• Test drive vehicle at low speed in a safe area and verify no unusual noises from front suspension
• Check for proper steering response and alignment
• Perform visual inspection of ball joint installation to ensure proper seating and no leaks from boot
• Schedule a professional wheel alignment as suspension geometry may have changed
• Recheck ball joint castle nut torque after 50-100 miles of driving

More procedures for this vehicle