Ball Joint - Lower

This procedure covers removal and replacement of the lower ball joint on the 2016-2021 Honda Civic with 1.5L turbo engine, including separation from the knuckle and control arm.

Warnings

Tools required

Parts

• Lower ball joint × 1 — 51220-TBA-A01 or aftermarket equivalent
• Pinch bolt (knuckle to ball joint) × 1 — Use OEM specification - one-time use
• Cotter pin × 1 — Use OEM specification

Preparation

1. Park vehicle on level ground and engage parking brake
2. Loosen wheel lug nuts while vehicle is on the ground
3. Raise front of vehicle and support securely on jack stands at designated jacking points
4. Remove wheel and tire assembly
5. Spray penetrating oil on ball joint nut, pinch bolt, and control arm bolts if corrosion is present

Procedure

1. 1

   Remove cotter pin and loosen ball joint nut
   Straighten and remove the cotter pin from the ball joint castle nut using pliers or a cotter pin removal tool. Loosen the ball joint nut but do not remove it completely at this time. Leaving it partially threaded protects the threads and prevents sudden separation.
2. 2

   Remove knuckle pinch bolt
   Locate the pinch bolt that secures the ball joint stud to the lower portion of the steering knuckle. Remove the 14mm pinch bolt completely. Note that this is a one-time use bolt and must be replaced. Discard the old bolt.
   ℹ️The pinch bolt must be replaced with a new one during reassembly.
3. 3

   Separate ball joint from knuckle
   With the pinch bolt removed, spread the knuckle pinch joint slightly using a pry bar if needed. If the ball joint does not separate easily from the knuckle, use a ball joint separator tool or pickle fork at the base of the ball joint stud. Strike the tool firmly with a hammer to separate. Once movement begins, remove the castle nut completely and separate the ball joint stud from the knuckle.
   ⚠Ball joint may separate suddenly. Ensure area is clear and knuckle is supported.
4. 4

   Support lower control arm
   Place a floor jack under the lower control arm near the ball joint mounting location to support the control arm weight and relieve tension. This prevents the control arm from dropping when the ball joint is removed.
5. 5

   Remove ball joint mounting bolts
   Locate the bolts securing the ball joint to the lower control arm (typically 2-3 bolts accessed from below). Remove these bolts completely and carefully lower the old ball joint from the control arm. Clean the mounting surface on the control arm with a wire brush to ensure proper seating of the new ball joint.
6. 6

   Install new ball joint to control arm
   Position the new ball joint onto the lower control arm, aligning all bolt holes. Install the ball joint mounting bolts and tighten to manufacturer specifications. Ensure the ball joint is fully seated against the control arm before final torquing.
7. 7

   Connect ball joint to knuckle
   Raise the lower control arm using the floor jack to align the ball joint stud with the hole in the steering knuckle. Insert the ball joint stud through the knuckle. Thread the castle nut onto the ball joint stud hand-tight.
8. 8

   Install new pinch bolt
   Install the new pinch bolt through the knuckle pinch joint, ensuring it passes through both sides of the knuckle and the ball joint stud slot. Torque the pinch bolt to specification.
   Torque spec

   Pinch Bolt58 Nm (43 lb-ft)
9. 9

   Torque ball joint castle nut and install cotter pin
   Torque the ball joint castle nut to 97 Nm (71 lb-ft). Align the castle nut slots with the cotter pin hole in the ball joint stud. If necessary, tighten the nut slightly (never loosen) to align the slots. Insert a new cotter pin through the hole and bend the ends to secure.
   ⚠Only tighten the castle nut to align cotter pin holes, never loosen it below torque specification.
   Torque spec

   Ball Joint Nut97 Nm (71 lb-ft)
10. 10

    Reinstall wheel and lower vehicle
    Reinstall the wheel and tire assembly. Thread lug nuts by hand, then tighten in a star pattern. Lower the vehicle until the tire just contacts the ground but suspension is not fully loaded. Torque wheel lug nuts to specification in a star pattern.
    Torque spec

    Wheel Lug Nuts129 Nm (95 lb-ft)
11. 11

    Final torque with vehicle weight on suspension
    Lower the vehicle completely to the ground so the full weight is on the suspension. If control arm bolts were loosened or removed during this procedure, torque them to specification with the vehicle at normal ride height. This ensures proper bushing alignment and longevity.
    ⚠Control arm bolts must be torqued at normal ride height to prevent premature bushing failure.
    Torque spec

    Control Arm Bolts165 Nm (122 lb-ft)

Reassembly

1. Ensure all fasteners are torqued to specification
2. Verify cotter pin is properly installed and bent to prevent removal
3. Check that pinch bolt is fully tightened and new bolt was used
4. Confirm no tools or parts were left in wheel well area

Verification

• Test drive vehicle at low speed in a safe area and verify no clunking or unusual noises from suspension
• Check for proper steering response and no pulling to either side
• Perform a post-repair inspection of all fasteners after 50-100 miles
• Schedule a professional alignment check as ball joint replacement affects suspension geometry

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