The SCR system
The SCR system reduces nitrogen oxide emissions in the exhaust gas. A reducing agent quality sensor and a
second NOx sender allow fast and precise monitoring of the SCR system. Furthermore the reducing agent tank
has a filling shut-off device.
Filler cap
Reducing agent tank with
approximately 12 litres capacity
Breather line
Filler pipe
Float
S571_007
Heater for reducing
agent tank Z102
Pump for
reducing agent V437
Delivery unit for
reducing agent
Reducing agent line
connection
metering system GX19
Reducing
agent quality
sensor G849
Electrical connection
Temperature sender for
reducing agent G685
Tank sender for reducing agent G684
You will find further information on the design and function of the SCR system in Self-study
Programme no. 540 “SCR Exhaust Gas Treatment in the Passat 2015”.
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