Removing and installing fuel pump control unit J538, vehicles with high-voltage system — VW
Removing and installing fuel pump control unit J538, vehicles with high-voltage system on VW: factory workshop procedure for engines CUKB.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
🔧 Engine codes this applies to
📋 Procedure
Removing and installing
fuel pump control unit
J538
, vehicles with high-voltage system
Removing
Move front seats to foremost position.
Switch off ignition.
Remove rear shelf
General body repairs, interior
Rep. gr.
70
Trims, interior; Removing and installing rear shelf
.
Fold down rear seat backrest
General body repairs, interior
Rep. gr.
72
Rear seats; Removing and installing bench seat/individual seats
.
Remove luggage compartment floor
General body repairs, interior
Rep. gr.
70
Luggage compartment trims; Removing and installing luggage compartment floor
.
Remove trims under luggage compartment floor
General body repairs, interior
Rep. gr.
70
Luggage compartment trims; Assembly overview - luggage compartment floor
.
Fold down rear seat backrests.
Remove battery
Electrical system
Rep. gr.
27
Battery; Removing and installing battery
.
Remove subwoofer
Communication
Rep. gr.
91
Sound system; Removing and installing
subwoofer
R211
.
Unscrew nuts
1
to
5
.
Take off cover
6
.
Unclip sealing grommet downwards from cover
6
.
Move cover
6
towards rear along wiring harness.
Using a screwdriver, carefully release retaining hooks
2
and
4
.
At the same time, carefully pull fuel pump control unit
3
out of mounting.
Disconnect connector
1
. To do this, release connector catches.
Installing
Note
Make sure that connectors are attached properly; pull to check that they are correctly engaged.
Insert
fuel pump control unit
J538
into mounting, and push it in until it engages audibly.
Further installation steps are carried out in the reverse order; note the following:
Connect battery. Observe required procedures after connecting battery
Electrical system
Rep. gr.
27
Battery; Disconnecting and connecting battery
.
Install luggage compartment floor
General body repairs, interior
Rep. gr.
70
Luggage compartment trims; Removing and installing luggage compartment floor
.
Install rear shelf
General body repairs, interior
Rep. gr.
70
Trims, interior; Removing and installing rear shelf
.
Specified torques
Chapter
“
Assembly overview - fuel delivery unit and fuel gauge sender
”
Communication
Rep. gr.
91
Sound system; Overview of fitting locations - sound system
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.