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Intake manifold, front exhaust pipe with catalytic converter and accessories. — VW

Intake manifold, front exhaust pipe with catalytic converter and accessories. on VW: factory workshop procedure for engines AZN, BAH, BNW, BPA.

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

factory workshop text 8 engine codes engine codes merged from 2 documented variants

🔧 Engine codes this applies to

📋 Procedure

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

Intake manifold, front exhaust pipe with catalytic converter and accessories.
BAH and BPA engines
Heat deflector from the exhaust manifold
12 Nm
Exhaust manifold
Gasket
Replace.
Self-locking nut
25.0 Nm
Replace after each removal.
To intermediate muffler
Front exhaust tube with catalytic converter
Insulator
For the catalytic converter.
Lifting tackle
Replace in case of faults.
25 Nm
Connector
Black, 4 poles.
To the
Lambda probe
G39
and
Lambda probe heating
Z19
.
Lambda probe
G39
, 50 Nm
Remove and install with the
Set of sockets for Lambda probe
3337
.
Lubricate the thread only with
High temperature paste
G 052 112 A3
. The
High temperature paste
G 052 112 A3
must not reach the grooves on the body of the probe.
In case of leakage, cut and replace the sealing ring.
Self-locking nut
40 Nm.
Replace after each removal.
Fastening clip
Support
For the electric cable.
CCRA and CFZA engines
WARNING
Always replace self-locking nuts and screws subject to angular torque
Heat deflector
12 Nm
Exhaust manifold with catalyser
For removal, remove heat deflector and loosen front exhaust tube.
Fastening self-locking nuts torque 25.0 Nm. Replace after each removal.
Lambda probe
G39
before the catalytic converter, 50 Nm
Lubricate only the thread with
High-temperature paste
G 052 112 A3
;
High-temperature paste
G 052 112 A3
cannot reach the grooves on the body of the probe.
Remove and install with the
Set of sockets for Lambda probe
3337
.
Remove sealing rind in case of leaks and replace it.
Sealing gasket
Replace.
Catalytic converter
Integrated to exhaust manifold.
To intermediate muffler
Front tube
25 Nm
Lifting tackle
Replace in case of faults.
Lambda probe after the catalyser
G130
, 50 Nm
(Engine CFZA for Argentina). For CCRA motorization, from as of 10/2010 with the OBD BR2.
Lubricate only the thread with
High-temperature paste
G 052 112 A3
;
High-temperature paste
G 052 112 A3
cannot reach the grooves on the body of the probe.
Remove and install with the
Set of sockets for Lambda probe
3337
.
Remove sealing rind in case of leaks and replace it.
Self-locking nut
40 Nm.
Replace after each removal.
Sealing gasket
Replace.

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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.