Routing of pipes/hoses (inside fuel tank) - exploded view — AUDI
Routing of pipes/hoses (inside fuel tank) - exploded view on Audi: factory workshop procedure for engines ASN, AUK, BBJ, BDX.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📐 20 workshop diagrams for ASN
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
Routing of pipes/hoses (inside fuel tank) - exploded view
Note
The illustration shows the correct routing of pipes/hoses inside the fuel tank (schematic view).
It is not necessary to route the pipes/hoses in exactly the same way as shown in the illustration, except for pipes/hoses shown in
Fig.
. However it is essential to fit the pipes/hoses with sufficient space in relation to each other and to prevent rattling noises.
The
arrow
points in direction of travel.
Fuel delivery unit (left-side) with
fuel system pressurisation pump
G6
Fuel supply line
From suction-jet pump (left-side) to fuel delivery unit (right-side)
Supply line for suction-jet pump
From fuel pump (right-side) to suction-jet pump (left-side)
Suction-jet pump (left-side)
Supply line for suction-jet pump
For fuel delivery unit (left-side)
Expansion tank
With suction-jet pump to extract fuel from expansion tank
Non-return flap
For fuel filler pipe
Primary filler pipe
To fuel delivery unit (right-side).
Ensures that a small amount of fuel is delivered immediately to the fuel delivery unit when the tank is filled for the first time.
Supply line for suction-jet pump
For fuel delivery unit (right-side)
Suction-jet pump (right-side)
Supply line for suction-jet pump
From fuel pump (left-side) to suction-jet pump (right-side)
Fuel supply line
From suction-jet pump (right-side) to fuel delivery unit (left-side)
Fuel delivery unit (right-side) with
fuel pump
G23
Fuel supply line
From fuel pumps (left and right) to flange
Breather line
To breather connection at top of fuel filler neck
Breather line
To activated charcoal filter at bottom of spare wheel well on underbody
Fuel return line
From flange to fuel delivery unit (right-side)
Fitted loosely in fuel delivery unit (right-side)
Fuel filler pipe
From fuel filler neck to non-return flap in fuel tank
Supply line for suction-jet pump
To suction-jet pump in expansion tank
Balance pipe
Between fuel delivery units
Installation position of fuel supply lines
The fuel supply lines
1
and
3
must be routed below the fuel filler pipe
2
at the left fuel tank opening.
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.