Air springs are a type of suspension system that uses air pressure and compression to improve handling. Usually installed in trucks, these springs can easily wear out because of the uneven roads trucks are designed to go through.
This is a repair guide for the front air spring of an Audi allroad. Other models might have variations in the steps.
Difficulty level: Moderate
- Floor jack and jack stand
- Lug wrench
- Socket and wrench set
- Screwdriver set
- Torx bit
- Replacement air spring
Step 1: Raise the vehicle using a floor jack and secure with jack stands. Remove the front wheel(s) using a lug wrench.
Step 2: Let the air out of the old air spring by disconnecting the air fitting on the top.
Step 3: Remove the bolt holding the springs from the control arms. Also remove the ball joints from the suspension link. Secure the hub assembly to avoid pressing on the brake lines and drive shafts.
Step 4: Take out the three bolts securing the spring under the hood. Before removing the last bolt, ask a helper to hold the spring before you completely loosen the bolt.
Step 5: Use a torx bit to remove the six mounting bolts on top.
Step 6: Detach the center flange nut from the shock. Set aside the rubber upper mount and washer. These will still be used for the new assembly.
Step 7: Separate the old air spring from the shock. You may need to tap the shock down if it's too tight.
Step 8: With the new air spring on hand, throw the old o-ring connecting the spring to the shock and replace it with a new, lubricated o-ring. Insert the new spring to the shock absorber.
Step 9: Return the top washer, rubber mount, flange nut and the other new o-ring (lubricated as well) to the assembly.
Step 10: Replace the shock caps and return the six torx bolts.
Step 11: Reverse the procedure to finish the repair.
This is a simple replacement job that will take about 1 hour.