Assembly overview - exhaust manifold, front exhaust pipe with catalytic converters and front silencers — VW
Assembly overview - exhaust manifold, front exhaust pipe with catalytic converters and front silencers on VW: factory workshop procedure for engines AXZ.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📋 Procedure
ℹ️ Torque figures below come verbatim from workshop data — always cross-check against your vehicle's factory manual before final tightening.
Assembly overview - exhaust manifold, front exhaust pipe with catalytic converters and front silencers
Note
On some vehicles an additional Lambda probe is installed after the catalytic converters
Item
and
Item
. Whilst these two probes are connected, they have no function.
Connector
Black, 6-pin.
Lambda probe
G39
, 50 Nm
Bank 1, probe 1
Installed in exhaust gas stream of cylinders 1, 2 and 3
Grease only thread with
G 052 112 A3
.
G 052 112 A3
must not get into slots in probe body.
Removing and installing using
Lambda probe ring spanner set
3337
Chapter
Lambda probe 2
G108
, 50 Nm
Bank 2, probe 1
Installed in exhaust gas stream of cylinders 4, 5 and 6
Grease only thread with
G 052 112 A3
.
G 052 112 A3
must not get into slots in probe body.
Removing and installing using
Lambda probe ring spanner set
3337
Chapter
Connector
Brown, 6-pin
Securing nut
Renew.
M8: 25 Nm.
M10: 40 Nm.
Lambda probe 2 after catalytic converter
G131
, 50 Nm
Bank 2, probe 2
Installed in exhaust gas stream of cylinders 4, 5 and 6
Grease only thread with
G 052 112 A3
.
G 052 112 A3
must not get into slots in probe body.
Remove and install with
Lambda probe open ring spanner set
3337
.
Connector
Brown, 4-pin
Secured to underbody.
Lambda probe after catalytic converter
G130
, 50 Nm
Bank 1, probe 2.
Installed in exhaust gas stream of cylinders 1, 2 and 3
Grease only thread with
G 052 112 A3
.
G 052 112 A3
must not get into slots in probe body.
Remove and install with
Lambda probe open ring spanner set
3337
.
Connector
Black, 4-pin.
Secured to underbody.
Heat shield
Rear intake manifold support
20 Nm
Gasket
Renew.
20 Nm
Exhaust manifold
Removing and installing
Chapter
.
25 Nm
Renew.
Front silencer
To centre silencer
25 Nm
Mounting
For front exhaust pipes, left and right.
Catalytic converters
See note
Chapter
.
Installed in exhaust gas stream of cylinders 1, 2, 3 right and 4, 5 and 6 left
Removing and installing
Chapter
.
Front exhaust pipes
With decoupling element.
Do not bend flexible connections more than 20° - otherwise they can be damaged.
Installed in exhaust gas stream of cylinders 1, 2, 3 right and 4, 5 and 6 left
Removing and installing
Chapter
.
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
- Removing and installing camshaft drive timing chain, vehicles with vacuum pump · 2 torque figures
- Installing fuel pump unit – VW Passat B6 · 2 torque figures
- Removing and installing intake manifold lower part with fuel rail · 1 torque figures
- Removing and installing ignition coils with output stage · 1 torque figures
- Separating centre and rear silencers · 2 torque figures
- 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.