A3 Mk2
| Parts of cooling system (on engine) - exploded view, engine code AXW, BLX, BHD, BLY, BLR, BMB |
| 1 - | Spring-type clip |
| 2 - | Connecting hose |
| 3 - | O-ring |
| q | Renew |
| 4 - | Coolant temperature sender -G62- |
| 5 - | Retaining clip |
| 6 - | Connection |
| 7 - | To top of radiator |
| 8 - | 10 Nm |
| 9 - | Throttle valve module -J338- |
| q | Heated by coolant |
| 10 - | 15 Nm |
| 11 - | Coolant pipe |
| 12 - | Connecting hose |
| 13 - | To oil cooler |
| 14 - | Coolant pipe |
| 15 - | 15 Nm |
| 16 - | To expansion tank |
| 17 - | 10 Nm |
| 18 - | Hose to bottom of radiator |
| 19 - | 15 Nm |
| 20 - | Coolant distributor housing |
| q | With map-controlled engine cooling thermostat -F265- |
| q | Dismantling → Chapter |
| 21 - | Coolant pump |
| q | Removing and installing → Chapter |
| 22 - | 15 Nm |
| 23 - | To heat exchanger (for heating system) |
| 24 - | To coolant hose (going to top of radiator) |
| 25 - | Exhaust gas recirculation valve -N18- |
| q | Water-cooled |
