Removing and installing Lambda probe 2 after catalytic converter G131 — VW
Removing and installing Lambda probe 2 after catalytic converter G131 on VW: 14 steps, 1 torque figure, engines BAN, BAP, BRN, BRP.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Phaeton (3D)
🔩 Torque settings
Values can differ between engine variants — check the code stamped on your block.
| Torque | Fastener / step |
|---|---|
| 50 Nm (37 lb-ft) | Screw in Lambda probe by hand and tighten hand-tight |
ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.
📋 Procedure
- Remove engine cover panels.
- Undo fastenings for coolant hose and vacuum line (arrows). Pull connector (A) off activated charcoal filter solenoid valve 1N80.
- Unscrew and remove fastenings (arrows) for the fuel pipes (A).
- Remove coolant pipe (A) and take off cover (B).
- Unscrew clip for Lambda probe cable (arrow).
- Detach connector for Lambda probe to be removed. Overview of Lambda probe connectors .
- Remove rear noise insulation 50.
- Remove catalytic converter with front silencer (cylinder bank 1) .
- Remove front right wheel.
- Remove right heat shield of the drive shaft (arrows). The third bolt is not visible on illustration.
- Remove front right exhaust pipe (cylinder bank 1).
- Detach Lambda probe cable from clamps.
- Unscrew Lambda probe 2 after catalytic converter G131 using an open ring spanner (A), joint and extension.
- Screw in Lambda probe by hand and tighten hand-tight. Tighten joint and an extension to 50 Nm, using an open-end ring spanner (A). — 50 Nm (37 lb-ft)
Other VW procedures
- Assembly overview - cylinder bank 2 exhaust manifold with starter catalytic converters and attachments
- Removing and installing sealing flange and drive plate
- Assembly overview - upper part of intake manifold (vehicles with engine codes BRN, BRP and BTT)
- Supporting engine in installation position · 8 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.