For 1990-2009 cars

1. Locate the leaking area with soap and water or a stethoscope.
2. Cut and remove the leaking line (2) section.
3. Remove the plastic retainer pin from one of the nuts.
4. Slide the air line tube onto the nut until the line bottoms in the rubber seal (5).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Hold the air line tube in position.

Tighten
Tighten the air line tube repair nut to 8 N·m (70 lb in).

6. Install the air line tube to the other end of the coupling.
7. Repeat Steps 3 through 5.

Important: Ensure that the repaired air line tube is secured in a location where the line is not pinched, or kinked, and will not contact the exhaust system.

8. Install the air line tube to the vehicle.
9. Inflate the automatic level control system and inspect for leaks.
10. Lower the vehicle.