The drain separator is installed to the model with the drain separator.
1. Lift up the vehicle.
2. Remove the rear differential. 
3. Disconnect the drain hose from the connector.
4. Remove the drain separator from the vehicle.
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO 1.5) > Drain Separator
The drain separator is installed to the model with the drain separator.
1. Lift up the vehicle.
2. Remove the rear differential.
3. Disconnect the drain hose from the connector.
4. Remove the drain separator from the vehicle.