Golf Mk4
| Assembly overview - air filter |
| 1 - | With heating resistor for crankcase breather -N79- |
| q | For crankcase ventilation. |
| 2 - | Connector |
| q | Black, 2-pin |
| q | For heater element for crankcase breather -N79- |
| q | Check power supply for heating resistor between contacts 1 and 2 with engine running. Specification: at least 11.5 V |
| 3 - | Connecting hose |
| q | For air scavenging in injectors |
| q | Not for engine codes BFH, BJS and BML |
| 4 - | Air mass meter -G70- with intake air temperature sender -G42- |
| q | Gold-plated contacts on sensor and connector. |
| 5 - | Connector |
| q | Black, 5-pin |
| q | Gold-plated contacts on sensor and connector. |
| 6 - | Seal |
| q | Renew if damaged. |
| 7 - | Air filter upper part |
| 8 - | 6 Nm |
| 9 - | Filter element |
| 10 - | Air filter lower part |
| 11 - | Air duct |
| 12 - | 10 Nm |
| 13 - | Intake hose |
| q | For crankcase ventilation. |
| q | From breather housing on cylinder head cover |
| q | Check for secure seating. |
| q | Press together at front to release. |
| 14 - | From cylinder head cover |
| 15 - | To crankcase breather valve |
| q | Under heater resistor |
| 16 - | To throttle valve module -J338-. |
