For the '74-'79 fuel-injected Bay Window bus (T2b)

Vacuum hose identification

No. Part No. Description Inside diameter Outside diameter Length Material Notes
1 n/a Hose (brake booster) — 13 mm — Hard tubing, black —
2 022 133 083 D Elbow — — — — —
3 071 133 086 Hose (decel valve to brake booster) 13 mm 15 mm 250 mm Hard tubing, transparent, vinyl Vanagon part number, but same hose
4 N 90402301 Hose (decel valve to brake booster) 14 mm 19 mm 65 mm Braided rubber In some fiches the outside diameter is 18 mm
5 022 201 919 Molded hose (decel valve to S-boot) 19 mm 24.5 mm 370 mm Braided rubber  
6 022 133 215 A Y-piece — — — —  
7 N 0202903 Hose (S-boot to aux. air regulator) braided 12 mm 19 mm 210 mm Braided rubber  
8 N 10123801 Hose (intake manifold to aux.air regulator) 13 mm 20 mm — Braided rubber  
9 022 129 637 Elbow 12 mm 16 mm 47 mm Rubber 90° elbow
9a n/a Intermediate piece n/a 13 mm 30 mm Steel Not in the picture
10 N 10098001 Clamp n/a n/a n/a n/a 18.5 x 7 x 0.60
11 N 0245223 Clamp n/a n/a n/a n/a 60-80 x 9 x 0.50
12 029 129 967 AC Hose (S-boot) n/a n/a n/a    
13 025 133 199 Intermediate piece TBD 22 mm 38 mm Steel or nylon More info
14 022 129 973 C Hose (crankcase breather) 21 mm 26 mm 350mm Braided rubber  
15 039 133 241 Connecting hose — — — —  
16 022 129 707 F Seal — — — —  
17 311 133 261 A Injector locator bush (inner) — — — —  

Vacuum control hose identification

No. Part No. Description Inside diameter Outside diameter Length Material Notes
- N 020 291 1 Hose connector 3.5 mm 5.5 mm 40 mm Braided rubber hose Alternative: N 0203122, 4x1.75 rubber hose
1 " " " " 40 mm " "
2 " " " " 120 mm " "
3 113 201 943 B T.piece - 4 mm - - -
4 N 0201391 Ported vacuum tube 2 mm 4 mm Variable n/a  
5 7M0 955 961 B Manifold vacuum tube 3 mm 5 mm Variable PA 6 nylon (hard tubing, white) Alternative: 867 955 961 A is the same part, just different length

Vacuum control hose routing