2017-2021 Volkswagen Polo SUV Power units -> The SCR system User Manual
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Power units -> The SCR system for Your Volkswagen Polo SUV Sixth Generation (2017-2021)

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”.  
23  

Related Topics

Power units
Engine and gearbox combinations The 1.0-l 48-kW/55-kW MPI engines The 1.0-l 70-kW/85-kW TSI engines The 2.0-l 147-kW TSI engine The 1.0-l 66-kW TGI engine (natural gas) The 1.6-l 59-kW/70-kW TDI engines Filling shut-off device Reducing agent quality sensor G849 Nitrogen oxide sensors

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