Vacuum hose connection diagram (aTL, BHC engines):
1. Vacuum receiver
2. Throttle valve "N₂11"
3. EGR valve "N18" (only VIS)
4. Check valve. White connector to the boost pressure limiting solenoid valve "N75"
5. Boost pressure limitation solenoid valve "N75"
6. To the brake booster
7. Check valve
8. Power vacuum pneumatic element for regulating boost pressure
9. To the turbocharger
10. Intercooler
11. Intake manifold
12. Tandem fuel and vacuum pump
13. Cylinder head
14. Power vacuum pneumatic element of the intake manifold flap (only BHC)
15. Mechanical EGR valve, intake manifold fitting element can only be replaced as a set with the intake manifold fitting
16. Air filter