Reducing Agent Active Tank And Attachments Overview

WARNING: This page is about a different variant/trim than selected.

NOTE:

Installed location: under the wheel housing liner in right rear wheel housing

Fig 1: Reducing Agent Active Tank And Attachments Overview

Courtesy of AUDI OF AMERICA, LLC

Union Nut
- Replace
- Use a Wrench - Union Nut T50014 for Removing and Installing.
- Tightening, refer to REDUCING AGENT DELIVERY UNIT, REMOVING AND INSTALLING (See Figure).
Reducing Agent Delivery Unit
- With Reducing Agent Tank Sensor -G684-.
- With Reducing Agent Temperature Sensor -G685-.
- With Reducing Agent Tank Heater (Heating Circuit 1) -Z102-.
- With filter
- Removing and Installing. Refer to REDUCING AGENT DELIVERY UNIT, REMOVING AND INSTALLING .
Seal
- Replace
- Install dry
Bolt
- Tightening specification: 9 Nm
Active Tank
- For the reducing agent.
- Removing and Installing. Refer to REDUCING AGENT ACTIVE TANK, REMOVING AND INSTALLING .
Transfer Line
- From the Reducing Agent Temperature Sensor -G685- to the active tank.
- Clipped in on fuel tank.
Cover
Filling Line
- From the active tank to the passive tank.
- Clipped in on fuel tank.
Reducing Agent Pump -V437-
- With Reducing Agent Pump Heater (Heating Circuit 2) -Z103-
- With Reducing Agent Metering System Pressure Sensor -G686-
- Removing and Installing. Refer to Reducing Agent Pump -V437-, REMOVING AND INSTALLING .
  WARNING:
  Danger due to reducing agent leaking out.
  - To prevent large amounts of reducing agent when opening the metering line, wait for the recirculation process to complete, refer to WORKING ON REDUCING AGENT METERING SYSTEM, VEHICLES WITH SCR CATALYTIC CONVERTER .
Metering Line
- from the Reducing Agent Pump -V437- to the Reducing Agent Injector -N474-
- with Reducing Agent Line Heater (Heating Circuit 2) -Z104-
- Clipped in on fuel tank
  WARNING:
  Danger due to reducing agent leaking out.
  - To prevent large amounts of reducing agent when opening the metering line, wait for the recirculation process to complete, refer to WORKING ON REDUCING AGENT METERING SYSTEM, VEHICLES WITH SCR CATALYTIC CONVERTER .
Bolt
- Tightening specification: 1.8 Nm
Return Line
- with Reducing Agent Line Heater (Heating Circuit 2) -Z104-
- Clip onto the active tank.
Supply Line
- with Reducing Agent Line Heater (Heating Circuit 2) -Z104-
- Clip onto the active tank.