Routing diagram for vehicles with diesel engine — VW
Routing diagram for vehicles with diesel engine on VW: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
Notes:
The lengths of the hoses/pipes are not shown to scale.
Select hoses/pipes from parts catalogue. Before installing cut to length and mark hose/pipe with coloured adhesive tape, if necessary.
Select securing elements from parts catalogue.
I -
Engine compartment and under floor
II -
Rear final drive and under floor
Model with ABS/freewheel lock and differential lock
A -
Differential lock valve
Removing and installing
=>Page
34-30
G -
Frame
H -
Freewheel lock connector
J -
Differential lock connector
K -
Differential lock actuator
Removing and installing
=>Page
34-32
L -
Freewheel lock actuator
Removing and installing
=>Page
34-34
M -
Rear final drive air vent
N -
Non-return valve
P -
Vacuum pump
Hoses 3.5 x 2
No. · Length / (mm) · Colour · Qty.
1 · 40 · 9
15 · 200 · Black/yellow · 1
16 · 200 · Brown · 1
17 · 450 · Black/yellow · 2
21 · 50 · Light green · 1
22 · 60 · Blue · 1
Other hose connections
No. · Designation · Qty.
19 · Angled piece · 1
Pipes 4 x 1
No. · Length / (mm) · Colour · Qty.
2 · 916 · Blue · 1
3 · 916 · Brown · 1
4 · 935 · Light green · 1
51) · 5040/5440 · Blue · 1
52) · 5220/5620 · Blue · 1
61) · 5000/5400 · Light green · 1
62) · 5180/5580 · Light green · 1
71) · 4870/5270 · Brown · 1
72) · 5150/5550 · Brown · 1
18 · 260 · Black · 1
20 · 360 · Black · 1
23 · 400 · White · 1
1)
Van, short/long wheel base
2)
Dropside, short/long wheel base
Other pipe connections
No. · Designation · Qty.
8 · Distribution piece · 1
Model with differential lock
A -
Differential lock valve
Removing and installing
=>Page
34-30
G -
Frame
J -
Differential lock connector
K -
Differential lock actuator
Removing and installing
=>Page
34-32
M -
Rear final drive air vent
N -
Non-return valve
P -
Vacuum pump
Hoses 3.5 x 2
No. · Length / (mm) · Colour · Qty.
1 · 40 · 7
17 · 450 · Black/yellow · 1
21 · 50 · Light green · 1
22 · 60 · Blue · 1
Other hose connections
No. · Designation · Qty.
19 · Angled piece · 1
Pipes 4 x 1
No. · Length / (mm) · Colour · Qty.
2 · 916 · Blue · 1
3 · 916 · Brown · 1
4 · 935 · Light green · 1
51) · 5040/5440 · Blue · 1
52) · 5220/5620 · Blue · 1
61) · 5000/5400 · Light green · 1
62) · 5180/5580 · Light green · 1
18 · 260 · Black · 1
23 · 400 · White · 1
1)
Van, short/long wheel base
2)
Dropside, short/long wheel base
Model with ABS/freewheel lock
G -
Frame
H -
Freewheel lock connector
L -
Freewheel lock actuator
Removing and installing
=>Page
34-34
M -
Rear final drive air vent
N -
Non-return valve
P -
Vacuum pump
Hoses 3.5 x 2
No. · Length / (mm) · Colour · Qty.
1 · 40 · 1
15 · 200 · Black/yellow · 1
16 · 200 · Brown · 1
17 · 450 · Black/yellow · 2
Other hose connections
No. · Designation · Qty.
19 · Angled piece · 1
Pipes 4 x 1
No. · Length / (mm) · Colour · Qty.
18 · 260 · Black · 1
20 · 360 · Black · 1
24 · 5358/57501) · Brown · 1
1)
Short/long wheel base
On vehicles with rear axle housing of aluminium (brilliant metallic) the following modifications must be noted:
The pipes -1- to operate differential lock -2- have been lengthened to 450 mm.
They must be fitted before installing the final drive.
The subsequent pipes have been shortened respectively.
When a freewheel lock actuator -3- has been fitted, the ventilation is connected with rear axle housing ventilation by a "T" piece -4-.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.