2. Fuel Supply System E46: Notes
2.1 Description Of Parts
FUEL SUPPLY SYSTEM E46 DESCRIPTION
| 1. Fuel tank (plastic) | 18. Rollover valve |
| 2. Electric fuel delivery pump | 19. Float valve (USA only) |
| 3. Surge chamber | 20. Fuel filter |
| 4. Pressure relief valve | 21. Pressure regulator |
| 5. Overflow protection valve | 22. 3/2-way valve (M52 USA only, M73) |
| 6. Suction jet pump | 23. Fuel rail |
| 7. Tank expansion line | 24. Engine control unit |
| 8. Non-return flap | 25. Intake manifold |
| 9. Filler neck | 26. Fuel evaporation control valve |
| 10. Fuel filler cap | 27. Flush line |
| 11. Refuelling vent line (all countries) | 29. Vacuum line (leak diagnosis pump USA only) |
| 12. Fuel feed line | 30. Breather pipe |
| 13. Fuel return line | 31. Activated carbon filter |
| 14. Operating vent line | 32. Activated carbon filter (USA only) |
| 15. Refuelling vent line (USA only) | 33. Leak diagnosis pump (USA only) |
| 15. Auxiliary vent line (Japan) | 34. Dust filter (USA only) |
| 16. Operating vent line | 35. Tank leak diagnosis module (USA only) |
| 17. Expansion tank |