Removing and installing fuel delivery unit from approx. 11.98 — AUDI
Removing and installing fuel delivery unit from approx. 11.98 on Audi: factory workshop procedure for engines ACK, AEB, AFY, AGA.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
🔧 Engine codes this applies to
📐 28 workshop diagrams for ACK
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
AEB AFY AGA AGE AJG AJK AJL AJP ALF ALG ALT ALW AML AMM AMX ANB ANK APC APR APS APU APZ AQD AQE AQJ ARE ARH ARJ ARK ARN ARS ART ASG ASM ASN ATX AWT AZA BAS BBJ BCY BDV BES
Special tools and workshop equipment required
Union nut spanner 3217
Removing
Observe safety precautions=> Page
20-1
.
Observe rules for cleanliness => Page
20-4
.
The fuel tank must not be more than 3/4 full when removing the fuel delivery unit. Drain tank if necessary => Page
20-13
.
Obtain code on vehicles with coded radio/integrated radio and navigation system.
With ignition switched off disconnect battery earth strap.
Unbolt cover for flange on fuel tank under floor trim in luggage compartment.
Note:
On Avant models, first remove luggage compartment floor covering
=> General body repairs, Interior; Repair group 70; Trim panels - Avant
General body repairs, Interior
Trim panels - Avant
Carefully release 4-pin connector -arrow- and unplug.
Warning
Fuel system is under pressure. Before opening the system place a cloth around the connection. Then release pressure by carefully loosening the connection.
Mark supply pipe -2- and return pipe -1-, and disconnect from flange.
Warning!
The fuel tank must not be more than 3/4 full when removing the fuel delivery unit.
Remove union nut with spanner 3217.
Pull fuel delivery unit and seal out of the opening in fuel tank.
Installing
Install in reverse sequence; note the following points:
Notes:
Fit new seal for flange (dry) in opening in fuel tank.
Secure all hose connections with the correct hose clips (same as original equipment)
=> Parts catalogue
Fit fuel delivery unit in fuel tank. Note correct position:
Marking on flange -1- must coincide with marking on fuel tank -2-.
Notes:
Black arrow points in direction of travel.
The marking "TDI" on the fuel tank can be disregarded.
Tighten union nut on flange to 80 Nm.
Connect 4-pin connector.
Install supply pipe -2- and return pipe -1- (as marked on removal).
Notes:
When the battery is reconnected, re-activate electrical equipment (radio/radio and navigation system, clock, electric windows) as described in the Owner's Manual.
Further procedures after reconnecting the voltage supply:
=> Motronic injection and ignition system; Repair group 24
Motronic injection and ignition system
Tightening torques
Component · Nm
Union nut for fuel delivery unit · 80
Battery terminal to terminal post · 5
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.