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Draining and filling hydraulic fluid — VW

Draining and filling hydraulic fluid on VW: factory workshop procedure. Full factory text, tools and checks.

Workshop procedure for VW — the factory write-up, straight from real workshop data.

factory workshop text

📋 Procedure

ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.

Draining and filling hydraulic fluid
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Draining
Carry out the function
“Relieving pressure, gearbox hydraulics”
Vehicle diagnostic tester
.
Remove securing bolts
2
and pull cover
1
downwards out of holder
arrow
.
Separate connector
arrow
.
Note
Separating connector
arrow
will prevent unintentional starting of
hydraulic pump for gearbox
V387
.
Remove hydraulic fluid filler plug
2
and hydraulic fluid drain plug
1
.
Catch hydraulic fluid which may run out in a commercially available container.
Screw in hydraulic fluid filler plug
2
and hydraulic fluid drain plug
1
with new seals
4
and
5
.
Filling
Remove bolt
2
from securing clamp.
Pull return hose
A
off connection pipe
1
.
Note
When return hose
A
is pulled off, the sealing boot may remain in the hose.
Then pull the sealing boot out of the return hose
A
and push the boot onto the connection pipe.
1
.
Push a commercially available funnel into the pulled off return hose
A
and add the specified quantity of
hydraulic fluid
G 004 000
arrow
.
Note
Maintain the hydraulic fluid level exactly.
Filling quantity 0.5 litre.
Specifications for hydraulic fluid
Maintenance
Booklet
10.2
.
Place return hose
A
on connecting pipe
1
.
Rejoin separated connector
arrow
for
gearbox hydraulic pump
V387
.
Carry out the function
“Learn gearbox shift position”
Vehicle diagnostic tester
.
Separate connector
arrow
again.
Unscrew inspection plug
3
.
Pull return hose
A
off connection pipe
1
.
Note
When return hose
A
is pulled off, the sealing boot may remain in the hose.
Then pull the sealing boot out of the return hose
A
and push the boot onto the connection pipe.
1
.
Unscrew inspection plug
3
.
Add
hydraulic fluid
Electronic parts catalogue
until it begins to run out through hole for fluid inspection plug
3
.
Screw in inspection plug
3
with new seal.
Place return hose
A
on connecting pipe
1
.
Screw in bolt
2
for securing clamp.
Now rejoin separated connector
arrow
for
gearbox hydraulic pump
V387
.
Then clear event memory entries
Vehicle diagnostic tester
.
Specified torque
Component
Specified torque
Hydraulic fluid inspection plug
35 Nm
Hydraulic fluid filler plug
35 Nm
Oil drain plug
35 Nm

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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.

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Workshop data on this page last updated 20 Sep 2026.