Servicing the Ignition Unit: VW 2.3 (AGL)
Step-by-step servicing the Ignition Unit for the VW 2.3 (AGL): factory workshop text. What to remove, in what order, and what to check after.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
🔧 Engine codes this applies to
📐 10 workshop diagrams for AGL
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.
Notes:
Only the components which specifically concern the ignition are dealt with here. Other components of the injection and ignition system:
=> Repair Group 24.
Motronic Injection and Ignition System (4-Valve)
The control unit for the injection and ignition system is equipped with a self-diagnosis.
Components marked with* are checked by self-diagnosis.
Before repairs and for trouble-shooting, the fault memory should be retrieved => Page
01-8
, Retrieving and deleting the fault memory.
So that the electrical components function perfectly, a voltage of at least 11.0 V is required.
With some tests, it can occur that a fault is detected by the control unit and this is then stored. For this reason, on completion of all tests and repairs, retrieve the fault memory and delete if necessary => Page
01-8
, Retrieving and deleting the fault memory.
Safety measures => Page
28-6
.
Test data, spark plugs => Page
28-7
.
Ignition cable with spark plug connectors, cyl. 1 and 3
approx. 2 kω
Ignition cable duct
Ignition transformer (N222)*
for cylinders 2 and 3
Checking => Page
28-8
Cable connector
10 Nm
Ignition transformer (N223)*
for cylinders 1 and 4
Checking => Page
28-8
Spark plug connectors
approx. 2 kω
Spark plug, 30 Nm
Use 3122B to remove and fit
Type and electrode gap
=> Page
28-7
, test data, spark plugs
Resistance for mapping adjustment (N221)*
Motronic control unit (J220)*
Installation point: beneath battery case
Page
24-14
, item
26
for fuel injection system, throttle valve control unit, lambda control, solenoid valve 1 for activated carbon container, solenoid valve for exhaust flap, speed limitation, ignition and self-diagnosis
in the event of replacement and disconnection from vehicle electrical system, carry out Basic Setting
=> Page
24-32
Check power supply => Page
24-75
Follow connection sequence of plugs=> Page
01-71
, Connecting test box V.A.G 1598, Connecting control unit
Cable connector
Engine speed sender (G28)*
Checking => Page
24-68
Hexagon socket-head screw
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
- Checking the Coolant Temperature Sender – VW AGL/AUH
- Checking the Operating States of the Engine – VW 2.3 AGL
- Checking the Intake Air Temperature Sender – VW 2.3 AGL
- Checking the Power Supply for the Control Unit – VW 2.3 AGL
- Checking the Intake System for Leaks (Unmetered Air) – VW 2.3
- 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.