A4 Mk2
| Diagram of coolant hose connections |
| Engine codes AVB, AVF, AWX |
| 1 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 2 - | Coolant pipe (top) |
| q | Removing and installing → Chapter |
| 3 - | Connection |
| q | For thermostat |
| q | Removing and installing thermostat → Chapter |
| q | Checking → Anchor |
| 4 - | Coolant pump |
| q | Removing and installing → Chapter |
| 5 - | Connection |
| q | with coolant temperature sender -G62- |
| 6 - | Heat exchanger for heater |
| q | If renewed, refill system with fresh coolant |
| 7 - | Bleeder hole |
| 8 - | Coolant pipe (bottom) |
| q | Removing and installing → Chapter |
| 9 - | Engine oil cooler |
| q | If renewed, refill system with fresh coolant |
| 10 - | Filler cap |
| q | With pressure relief valve |
| q | Checking pressure relief valve → Anchor |
| 11 - | Expansion tank |
| Engine codes BKE, BPW, BRB, BRC |
| 1 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 2 - | Coolant pipe (top) |
| q | Removing and installing → Chapter |
| 3 - | Connection |
| q | For thermostat |
| q | Removing and installing thermostat → Chapter |
| q | Checking → Anchor |
| 4 - | Coolant pump |
| q | Removing and installing → Chapter |
| 5 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 6 - | Exhaust gas recirculation cooler |
| q | If renewed, refill system with fresh coolant |
| q | Removing and installing → Rep. Gr.23 |
| 7 - | Hose connection with coolant temperature sender -G62- |
| 8 - | Heat exchanger for heater |
| q | If renewed, refill system with fresh coolant |
| 9 - | Bleeder hole |
| 10 - | Coolant pipe (bottom) |
| q | Removing and installing → Chapter |
| 11 - | Engine oil cooler |
| q | If renewed, refill system with fresh coolant |
| 12 - | Expansion tank |
| q | With filler cap |
| q | Checking pressure relief valve in filler cap → Anchor |
