Audi Cars 1999-05

Lower Ball Joint


Removal & Installation

The Audi A4 front suspension is equipped with 2 separate upper ball joints that are not replaceable, therefore the upper link (front or rear) must be replaced. To remove this link, perform the following procedures.

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  3. Remove or disconnect the following:

    Front wheels
    Pinch bolt and pull both control arms upward and out

  5. Cover the steering gear boot.
  7. Remove or disconnect the following:

    Guide link ball joint and press off the joint
    Anti-lock Brake System (ABS) wheel speed sensor wire from the brake caliper bracket

  9. Support the suspension from excessive rebound travel.
  11. Remove or disconnect the following:

    Lower strut bolt and swing the wheel bearing housing aside
    Rubber grommets from the plenum chamber
    Upper strut-to-body nuts
    Strut together with the mounting bracket

  13. Clamp the strut in a vise with the protective jaw covers.
  15. Remove or disconnect the following:

    Upper link bolts and detach both of the links
    Bracket-to-strut nuts, then separate


To install:

  1. Install or connect the following:

    Brackets and links, as shown. Torque the bracket-to-strut mounting nuts to 15 ft. lbs. (20 Nm)
    Links by aligning them, as shown. Torque to 37 ft. lbs. (50 Nm) plus a 1 / 4 (90 degree) turn
    Strut with mounting bracket. Torque the upper strut-to-body nuts to 48 ft. lbs. (75 Nm)
    Lower strut bolt. Torque it to 66 ft. lbs. (90 Nm)
    Nut on the ball joint. Torque to 74 ft. lbs. (100 Nm)
    Upper links to the wheel bearing housing. Torque the pinch bolt to 30 ft. lbs. (40 Nm)
    ABS wiring to the brake caliper bracket

  3. Check the front suspension alignment.

    Click image to see an enlarged view

    Fig. Exploded view of the front suspension-A4 models