The 2009 Audi A6 has a new heater water valve. Do you need to match it?

No need.

There is no need to match the heater control motor after replacing it in the Audi A6. It is a DC motor and can be used normally by just plugging in the plug.

The heater control motor of the Audi A6 is a motor used to switch on and off the operation of the Audi A4 heater. The click has its own limit point inside, that is, when the angle of the heater reaches this point during operation, it will Stop automatically.