For 1990-2009 cars

### Removal Procedure

1. Drain all of the air from the air supply system.
2. Mark the lines to the air suspension relief valve.
3. Disconnect the electrical connector (3) at the air suspension relief valve.
4. Remove the following components:

• | The air suspension relief valve mounting bolts (1)

• | The washers (2)

• | The air suspension relief valve

### Installation Procedure

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.

1. Install the following components:

• | The air suspension relief valve

• | The washers (2)

• | The air suspension relief valve mounting bolts (1)

Tighten
Tighten the bolts to 18 N·m (13 lb ft).

2. Connect the electrical connector (3) to the air suspension relief valve.
3. Connect the air lines of the air suspension relief valve to the correct ports on the air suspension relief valve.
4. Operate the vehicle in order to charge the air supply system and to ensure that the valve does not leak.