This procedure covers the removal and replacement of the lower control arm on a 2018-2024 Toyota Camry with the 2.5L I4 engine, including disconnection of the ball joint and control arm mounting points.

Warnings

Tools required

Parts

• Lower control arm assembly × 1 — Use OEM specification
• Cotter pin for ball joint × 1 — Use OEM specification
• Control arm mounting hardware (if corroded) × 1 — Use OEM specification

Preparation

1. Park vehicle on level surface and apply parking brake
2. Place wheel chocks behind rear wheels
3. Loosen wheel lug nuts 1/4 turn while vehicle is on ground
4. Raise front of vehicle with floor jack at recommended jacking point
5. Support vehicle securely on jack stands placed at proper support points on frame rails
6. Remove front wheel on side being serviced
7. Spray penetrating lubricant on control arm bolts and ball joint nut, allow to soak while gathering tools

Procedure

1. 1

   Remove ball joint cotter pin
   Locate the ball joint castle nut where the lower control arm connects to the steering knuckle. Straighten and remove the cotter pin using pliers. If the cotter pin is corroded, it may need to be cut or drilled out. Discard the old cotter pin.
2. 2

   Loosen ball joint nut
   Using a 17mm socket, loosen the ball joint castle nut but do not remove it completely yet. Leave it threaded on 2-3 turns to protect the threads and prevent the knuckle from dropping suddenly when the taper breaks free.
   ⚠Do not fully remove the nut until the ball joint taper is separated. The knuckle can drop suddenly and cause injury or damage.
3. 3

   Separate ball joint from knuckle
   Install a ball joint separator tool between the control arm and steering knuckle. Tighten the tool to apply pressure to separate the tapered ball joint stud from the knuckle. You may need to tap the knuckle boss with a hammer while applying pressure. Once the taper breaks free, remove the castle nut completely and separate the ball joint from the knuckle.
4. 4

   Remove front control arm mounting bolt
   Locate the front control arm mounting bolt that connects the control arm to the front subframe. This is a large bolt typically 19mm. Use a breaker bar to loosen and remove this bolt completely. Note the orientation of any washers or spacers for reinstallation.
   ℹ️The control arm may be under slight tension. Support it with your hand as you remove the final threads of the bolt.
5. 5

   Remove rear control arm mounting bolt
   Locate the rear control arm mounting bolt that connects the control arm to the rear subframe mount. Use a breaker bar and 19mm socket to loosen and remove this bolt. The control arm should now be free to remove from the vehicle. Maneuver it out from between the subframe and knuckle.
   ℹ️You may need to use a pry bar to slightly shift the control arm position to clear all mounting points during removal.
6. 6

   Inspect and clean mounting points
   With the control arm removed, inspect the ball joint taper in the knuckle for damage or excessive wear. Clean the bolt holes in the subframe mounts with a wire brush. Check for rust, damage, or elongated holes that could indicate prior impact damage. Inspect the new control arm for shipping damage and verify the ball joint boot is intact.
   ℹ️If subframe bolt holes show elongation or damage, further structural inspection is required before proceeding.
7. 7

   Install new control arm
   Position the new lower control arm into place, aligning the mounting points with the subframe. Insert the front and rear mounting bolts through the control arm bushings and into the subframe. Thread the bolts in by hand to ensure proper alignment. Do NOT torque these bolts yet - they must be torqued at normal ride height.
   ⚠Control arm bolts must only be snugged at this stage. Final torque must be applied with vehicle weight on suspension.
8. 8

   Connect ball joint to knuckle
   Lift the control arm ball joint stud up into the tapered hole in the steering knuckle. You may need to use a pry bar to align the holes. Install the castle nut and tighten it to specification. Ensure the castle nut slots align with the hole in the ball joint stud for cotter pin installation. If needed, tighten slightly more (never loosen) to align the slots.
   Torque spec

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

   Install new cotter pin
   Insert a new cotter pin through the castle nut slots and ball joint stud hole. Bend the ends of the cotter pin in opposite directions to secure it. Ensure the cotter pin cannot back out. Verify the ball joint has no vertical play by attempting to move the knuckle up and down relative to the control arm.
   ℹ️Never reuse a cotter pin. Always install a new one to ensure proper retention.
10. 10

    Reinstall wheel and lower vehicle
    Reinstall the wheel onto the hub, threading lug nuts on by hand. Lower the vehicle from the jack stands using the floor jack until the suspension is at normal ride height with full vehicle weight on the wheels, but keep the jack in place for support. Torque the lug nuts in a star pattern to specification.
    Torque spec

    Wheel Lug Nuts136 Nm (100 lb-ft)
11. 11

    Torque control arm bolts at ride height
    With the vehicle weight on the suspension at normal ride height, torque both the front and rear control arm mounting bolts to specification. This is critical - torquing these bolts with the suspension hanging will preload the bushings incorrectly and cause premature failure. Use a torque wrench capable of 165 Nm.
    ⚠This is the most critical step. Control arm bolts MUST be torqued at normal ride height with vehicle weight on wheels. Incorrect procedure will destroy bushings within weeks.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)
12. 12

    Final lowering and verification
    Fully lower the vehicle to the ground and remove the jack. Rock the vehicle side to side several times to settle the suspension. Recheck the torque on all fasteners including lug nuts, control arm bolts, and ball joint nut. Verify the cotter pin is properly installed and secure.
    ℹ️A final torque check after settling the suspension ensures all fasteners remain properly tightened.

Reassembly

1. Control arm mounting bolts must be torqued with vehicle at normal ride height
2. Always use a new cotter pin on the ball joint castle nut
3. Verify all torque specifications are met before test driving
4. If replacing both sides, repeat entire procedure for opposite side

Verification

• Test drive vehicle at low speed and verify no clunking or abnormal noises from front suspension
• Check for proper steering response and straight-line tracking
• Perform visual inspection under vehicle to verify all fasteners are tight and cotter pin is secure
• Schedule alignment check within 50 miles - control arm replacement will affect camber and toe settings
• After 50-100 miles, recheck all fastener torque values as a final verification

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