Removing and installing alternator C, 2.5 l, 125 kW petrol engine — VW
Removing and installing alternator C, 2.5 l, 125 kW petrol engine on VW: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
Removing and installing
alternator
C
, 2.5 l, 125 kW petrol engine
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Torque wrench
V.A.G 1332
Caution
When disconnecting or reconnecting the
battery
A
, adhere strictly to the procedure described in the workshop manual
Chapter
.
Removing
Disconnect
battery
A
Chapter
.
Remove engine cover
Rep. gr.
10
Engine cover ; Removing and installing engine cover
.
Move lock carrier to service position
General body repairs, exterior
Rep. gr.
50
Lock carrier; Moving to service position
.
Caution
Prior to removal, mark top side and direction of rotation of poly V-belt. When installing, ensure correct fitting position and direction of rotation. If the belt is installed in the wrong position or against direction of rotation, the belt will be destroyed!
Remove poly V-belt
Rep. gr.
13
Cylinder block on pulley side; Removing and installing poly V-belt
.
Release and detach connector (DF wire)
1
and remove protective cap
2
.
Unscrew B+ wire
arrow
from
alternator
C
.
Remove upper idler roller, lower idler roller and the poly V-belt tensioner for
alternator
C
and coolant pump
Rep. gr.
13
Cylinder block, belt pulley end; Assembly overview - poly V-belt drive
.
Undo bolts
arrows
holding
alternator
C
in place.
Unscrew wire holder
arrow
from
alternator
C
.
Remove
alternator
C
.
Installing
Install in the reverse order of removal. When doing this, note the following:
Caution
When fitting used poly V-belts observe the direction of rotation marked on removal!
Before installing poly V-belt, make sure that all ancillaries (
alternator
C
, air conditioner compressor, power assisted steering vane pump) are secured tightly.
When fitting poly V-belt, make sure it is properly seated on the pulleys.
Drive threaded sleeves
A
roughly 4 mm in direction of arrow out of
alternator
C
housing.
Secure wiring retainer
arrow
on back of
alternator
C
in 9 o'clock position.
Tighten threaded connections to specified torque
Chapter
.
Reconnect
battery
A
Chapter
.
Start engine and check belt running.
Stop engine.
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.