A3 Mk1
| Diagram of coolant hose connections |
| 1 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 2 - | Oil cooler |
| q | Removing and installing → Item |
| 3 - | Coolant pump |
| q | Removing and installing → Chapter |
| 4 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 5 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → Anchor |
| 6 - | Intake manifold |
| 7 - | Heating for throttle valve housing |
| 8 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
| 9 - | Heating valve |
| 10 - | ATF cooler |
| q | Vehicles with automatic gearbox only |
| 11 - | Thermostat for map-controlled engine cooling system |
| q | Removing and installing → Chapter |
| q | Checking → Chapter |
