Removing and installing front exhaust pipe — VW

Removing and installing front exhaust pipe on VW: 14 steps, engines CAVA, CAVD, CAWB, CBFA. What to remove, in what order, and what to check after.

This covers the front exhaust pipe with catalytic converter on the platform codes listed below (5C7 and 5C1), across a long list of petrol engine codes running from CAVA through to CUUB. The pipe is bolted to the turbocharger outlet with nuts reached partly from above and partly from below, so the work alternates between the engine bay and the underside. Expect to unplug and route aside the Lambda probe G39 wiring, separate further connectors on the underbody, drop the underbody cover slightly, remove the exhaust bracket and the front tunnel bridge, then free the clamp and lower the assembly. What decides the outcome is the decoupling element: it must never be bent more than 10°, its wire mesh is easily damaged, and it must sit free of tension when refitted.

14 steps 40 engine codes engine codes merged from 20 documented variants

🧭 Before you start

Unplug the Lambda probe G39 and remove the upper turbocharger nuts from above. Underneath, take off the noise insulation, remove the lower turbo nuts, ease the underbody cover down, separate the probe and underbody connectors and unbolt the exhaust bracket and front tunnel bridge. Loosen the clamp, push it rearwards and lower the front pipe complete with the catalytic converter. Refit in reverse, leaving the decoupling element unstressed.

Fits: platform codes 5C7, 5C1

Don't miss

Do not bend the decoupling element more than 10°, and keep it supported while the pipe is loose.
Protect the wire mesh on the decoupling element; damage there means a replacement.
Lay the Lambda probe wiring clear before lowering the pipe so it is not stretched.
Install the decoupling element with no tension in it; align the system before final tightening.
Turbocharger flange nuts are usually renewed as standard practice because they are exposed to high heat.

Written for this job from the workshop steps below · TorqFix editorial.

🔧 Engine codes this applies to

CAVA CAVD CAWB CBFA CCTA CCZA CDGA CDLA CDLC CDLG CDLK CFNA CFNB CKFC CKMA CLHA CLHB CLHC CLRA CNWA CRBC CRGA CRKA CRKB CRLB CRMB CRNB CRUA CRVA CTHA CTHD CTKA CUAA CUNA CUPA CUSA CUSB CUTA CUUA CUUB

📐 60 workshop diagrams for CAVA

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

Removing and installing front exhaust pipe — CAVA · diagram 1

Removing and installing front exhaust pipe — CAVA · diagram 2

Removing and installing front exhaust pipe — CAVA · diagram 3

Removing and installing front exhaust pipe — CAVA · diagram 4

Removing and installing front exhaust pipe — CAVA · diagram 5

Removing and installing front exhaust pipe — CAVA · diagram 6

Removing and installing front exhaust pipe — CAVA · diagram 7

Removing and installing front exhaust pipe — CAVA · diagram 8

+ 52 more diagrams

🔒 60 workshop diagrams for this job Ask about your VW CAVA — free or sign up free to see the drawings

📋 Procedure

Observe safety instructions .
Observe repair instructions .
Disconnect connector for Lambda probe G39(arrow) and lay wiring harness to side.
Remove nuts (accessible from above) (arrows) securing front exhaust pipe to turbocharger.
Remove noise insulation General body repairs, exterior66Noise insulation; Assembly overview - noise insulation.

CAVA? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →

Unscrew nuts (accessible from below) securing front exhaust pipe to turbocharger.
Unscrew nuts (arrows) and pull underbody cover down slightly.
Unclip lines (arrows), pull off retainer (2) and separate electrical connectors (1 and 3).
Separate electrical connection (arrow) on underbody.
Remove electrical connector from bracket and lay electrical line to Lambda probe to side.
Unbolt bracket for exhaust system (arrows).
Remove tunnel bridge for underbody at front (arrows).
⚠ Danger of damage to decoupling element:Do not bend decoupling element more than 10°.Install decoupling element so that it is not under tension.Take care not to damage wire mesh on decoupling element. — Loosen clamp (1) and push to rear.
Remove front exhaust pipe with catalytic converter.

Workshop diagrams

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Workshop data on this page last updated 20 Sep 2026.