A4 Mk1
| Hose connection diagram for exhaust gas recirculation |
| 1 - | Vacuum hose |
| q | From mechanical exhaust gas recirculation valve to exhaust gas recirculation valve -N18- |
| 2 - | Mechanical exhaust gas recirculation valve |
| q | Checking → Chapter |
| 3 - | To charge pressure control solenoid valve -N75- |
| 4 - | To breather connection at air cleaner housing |
| 5 - | Non-return valve |
| q | Installation position (light side/dark side): as shown in illustration |
| 6 - | Brake servo |
| 7 - | Exhauster pump |
| q | For brake servo |
| 8 - | Exhaust gas recirculation valve -N18- |
| q | Checking → Chapter |
| 9 - | To vacuum reservoir |
