Removing and installing parts of the injection system for AGU engine — VW
Removing and installing parts of the injection system for AGU engine on VW: factory workshop procedure for engines AGN, AGU, AQA, ARZ.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📐 46 workshop diagrams for AGN
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.
Removing and installing parts of the injection system for AGU engine
Removing and installing parts of the injection system for ARZ, AUM, AUQ engines
Chapter
.
Removing and installing parts of the injection system for AGN engine
Chapter
.
Removing and installing parts of the injection system for AQA engine
Chapter
.
Air cleaner
Dismantling and assembling
Chapter
.
10 Nm
6 Nm
Vacuum union
To intake manifold.
28-pin connector
Only disconnect or connect with ignition switched off.
Release to disconnect.
52-pin connector
Only disconnect or connect with ignition switched off.
Release to disconnect.
Motronic control unit
J220
Location: in plenum chamber.
4-pin connector
Black.
For
Lambda probe
G39
and
Lambda probe heating
Z19
.
Location
Chapter
.
Lambda probe
G39
, 50 Nm
Location: in front exhaust pipe.
Grease threads only with
hot bolt paste
G 052 112 A3
,
hot bolt paste
G 052 112 A3
must not get into the slots of probe body.
Probe heating voltage supply via
fuel pump relay
J17
.
Location
Chapter
.
10 Nm
Engine speed sender
G28
3-pin connector
Grey
For
engine speed sender
G28
.
Location
Chapter
.
O-ring
Bracket
For engine cover.
10 Nm
Support
Between intake manifold and engine block.
20 Nm
10 Nm
Support bracket
For accelerator cable.
Gasket
Renew.
10 Nm
Active charcoal filter solenoid valve 1
N80
Throttle valve module
J338
Intake manifold
Return line
Secure with spring-type clips.
Check for secure seating.
Supply line
Secure with spring-type clips.
Check for secure seating.
10 Nm
Fuel rail with injectors
Dismantling and assembling
Chapter
.
Intake air temperature sender
G42
10 Nm
To pipe between turbocharger and charge air cooler
Securing clip
Check for secure seating.
O-ring
Renew if damaged.
Coolant temperature sender
G62
Blue
For
Motronic control unit
J220
.
With
coolant temperature gauge sender
G2
.
If necessary, release pressure in cooling system before removing.
Connector
Blue, 4 pin
For
coolant temperature sender
G62
.
To pressure actuator on turbocharger
To turbocharger
From crankcase breather
Gasket
Renew.
Charge pressure control solenoid valve
N75
Air mass meter
G70
5-pin connector.
Intake hose
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.
Ask about my car →Other VW procedures
- Testing solenoid valve for camshaft adjustment – Audi 1.8 AGN
- Removing and installing crankshaft
- Removing and installing parts of cooling system
- Removing and installing parts of injection system for ARZ, AUM, AUQ engines
- Testing intake manifold change-over valve
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 torque figures
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.