How to Install a Land Rover Discovery 3 or 4 Air Compressor – In Under 30 minutes.

Introduction

Once you’ve tested your Land Rover Discovery 3 air compressor, it’s time for installation. Following the correct steps ensures a smooth, error-free replacement. Here’s a full guide to removing and installing a Discovery 3 air compressor safely.

Removing the Old Compressor

1. Remove the bottom cover
   • Two 10mm bolts at either end.
2. Disconnect air lines and electrical connections
   • Rear intake line requires a 19mm spanner.
   • Disconnect motor power and solenoid plugs.
3. Remove the exhaust push-fit connector
4. Remove noise-isolating bolts
5. Slide out the compressor
   • Lift the top half of the compressor cover and slide the unit toward the rear.

Installing the New Compressor

Installation is the reverse of removal:

1. Slide the compressor into place, lifting the top cover as needed.
2. Reattach noise-isolating bolts.
3. Reconnect the exhaust push-fit connector.
4. Reattach air lines and electrical plugs.
5. Secure the bottom cover with 10mm bolts.

Tips for a Smooth Installation

• Double-check all plugs and air lines before securing.
• Avoid stretching or twisting air lines.
• Cycle the air suspension after installation to ensure proper operation.