0B5 (DL501), 0BH (DQ500): N440 - valve no. 4 for pressure regulation in sub-gearbox 2 and N436 - valve no. 4 for pressure regulation in sub-gearbox 1 - according to the manufacturer this solenoid is typically used with V6 and higher.
Mechatronic N436 Sub Transmission 1 Valve 4 (for pressure regulation in sub-gearbox 1) N440 Sub Transmission 2 Valve 4 (for pressure regulation in sub-gearbox 2)