Passive tank with recirculating pump unit
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.
The passive tank is connected to the active tank by a line. The recirculating pump unit is located in this line.
The recirculating pump unit pumps AdBlue from the passive tank to the active tank. The recirculating pump unit is activated by the SCR control unit. Fluid levels are determined by fill level sensors in the active tank and passive tank.
| Item | Explanation |
|---|---|
| 1 | Passive tank |
| 2 | Transfer pump |
| 3 | two-pin plug connection |
| 4 | Recirculating pump unit line |
| 5 | three-pin plug connection |
| 6 | Fill level sensor |