Leon Mk2
| Fitting locations overview: Engine codes APF, AUR |
| 1 - | Activated charcoal filter solenoid valve 1 -N80- |
| q | Location: activated charcoal filter |
| q | Activated charcoal filter system → Chapter |
| 2 - | Return pipe |
| q | Immobiliser with strip clamps |
| q | Goes to the fuel transport unit in the tank → Chapter |
| 3 - | Supply pipe |
| q | Immobiliser with strip clamps |
| q | Comes from the fuel filter → Chapter |
| 4 - | Hall sender -G40- |
| q | Beneath the upper cover of the toothed belt |
| 5 - | Variable intake manifold change-over valve -N156- |
| 6 - | Decompression actuator |
| 7 - | Upper element of the intake manifold |
| q | Remove and install → Chapter |
| 8 - | Lower element of the intake manifold |
| 9 - | Throttle valve control unit -J338- |
| q | In case of replacement, adapt the engine control unit → Chapter |
| q | Without an accelerator control cable pulley, because it is an electronic accelerator |
| q | 6-pin connector |
| q | Golden contacts |
| 10 - | Exhaust gas recirculation valve -N18- |
| q | With potentiometer |
| q | 6-pin connector |
| q | In case of replacement, adapt the engine control unit → Chapter |
| 11 - | Combined valve |
| q | Secondary air system → Chapter |
| 12 - | Secondary air injection valve -N112- |
| q | Secondary air system → Chapter |
| 13 - | Coolant temperature sender -G62- |
| q | Green |
| q | For engine control unit |
| q | With coolant temperature gauge sender -G2- |
| q | Before removing, reduce cooling system pressure |
| 14 - | 81-pin connector |
| q | Remove or connect the connector with the ignition switched off |
| q | Unblock to remove |
| 15 - | Engine control unit (Simos control unit -J361-) |
| q | Location: in plenum chamber |
| q | Replace → Chapter |
| 16 - | 40-pin connector |
| q | Remove or connect the connector with the ignition switched off |
| q | Unblock to remove |
| 17 - | Air mass meter -G70- with intake air temperature sender -G42- |
| q | Golden contacts on sensor and connector |
| 18 - | Air filter |
| q | Remove and install → Chapter |
| 19 - | Ignition coils (-N-, -N128-) |
| q | With final output stage -N122- |
| 20 - | Engine speed sender -G28- |
| 21 - | Injector (-N30-…-N33-) |
| 22 - | Secondary air pump motor -V101- |
| q | Secondary air system → Chapter |
| 23 - | Knocking sensor 1 -G61- |
| q | Golden contacts on sensor and connector |
| 24 - | Fuel pressure adjuster |
| q | Check → Chapter |
| 25 - | 4-pin connector |
| q | Brown |
| q | For lambda probe 2 after catalyst -G130- and heater for the lambda probe -Z29- |
| 26 - | Lambda probe 2 after catalyst -G130-, 50 Nm |
| q | In case of replacement, adapt the engine control unit → Chapter |
| q | Only grease the groove with -G 052 112 A3-. The -G 052 112 A3- should not be in contact with the grooves in the body of the probe |
| 27 - | 6-pin connector |
| q | Black, for lambda probe 1 before catalyst -G39- and lambda probe heater -Z19- |
| 28 - | Lambda probe 1 before catalyst -G39-, 50 Nm |
| q | In case of replacement, adapt the engine control unit → Chapter |
| q | Lambda probe linear |
| q | Location: in the exhaust manifold |
| q | Only grease the groove with -G 052 112 A3-. The -G 052 112 A3- should not be in contact with the grooves in the body of the probe |
| q | Probe heater voltage supply through the fuel pump relay -J17- |
