Reducing Agent Injector -N474-, REMOVING AND INSTALLING, VEHICLES WITH ENGINE CODES CTBA AND CTBC: Removing

WARNING: This page is about a different car, the 2016 Audi Q5, 2015 Audi Q5, and 2014 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

WARNING:

When working on the whole exhaust system:

Follow the safety precautions when working on the exhaust system, refer to EXHAUST SYSTEM SAFETY PRECAUTIONS .

WARNING:

The reducing agent can cause skin irritation.

Always observe the safety precautions when working with reducing agent, refer to SCR SYSTEM SAFETY PRECAUTIONS .
Wear protective eyewear.

Follow the guidelines for clean working conditions, refer to CLEAN WORKING CONDITIONS .

-- Remove the engine cover, refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Remove the tower brace, refer to TOWER BRACE, REMOVING AND INSTALLING .

-- Remove the connector -arrow- from the bracket, disconnect, and free up.

Fig 1: Identifying Connector

Courtesy of AUDI OF AMERICA, LLC

NOTE:

To catch escaping reducing agent place a clean cloth under the separation point.

Fig 2: Disconnecting Metering Line -1- From Reducing Agent Injector -N474- By Pressing Release Buttons -Arrows-

Courtesy of AUDI OF AMERICA, LLC

-- Disconnect the metering line -1- from the Reducing Agent Injector -N474- by pressing the release buttons -arrows-.

-- Fold back the heat shields at the coolant hoses.

Fig 3: Identifying Reducing Agent Injector -N474-

Courtesy of AUDI OF AMERICA, LLC

-- Clamp off the coolant hoses -2- with Hose Clamps - Up To 25mm 3094 and remove.

-- Loosen the clamp -1- and remove the Reducing Agent Injector -N474-.