Looking for a supplier, Toyota Australia want over $80 aud each for these. They say to replace every 42 months so now due. Part No's are: 17344-51040 Hose Air No. 4 ; 17343-51040 Hose Air No. 3 ; 17342-51040 Hose Air No.2 ; 17341-51050 Hose Air No. 1 . They are about 200mm long 10mm dia with assorted little bends and check the DPF air pressure at the diesel particulate filter. VDJ 4.5 litre Diesel twin Turbo 2017 model.