Removing and installing catalytic converter (engine codes BJJ, BJK, BJL, BJM) — VW
Removing and installing catalytic converter (engine codes BJJ, BJK, BJL, BJM) on VW: factory workshop procedure for engines BJJ, BJK, BJL, BJM.
Workshop procedure for VW — the factory write-up, straight from real workshop data.
📐 16 workshop diagrams for BJJ
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
Removing and installing catalytic converter (engine codes BJJ, BJK, BJL, BJM)
Special tools and workshop equipment required
Torque wrench
V.A.G 1331
Torque wrench
V.A.G 1332
Caution
The particulate filter bellows element is sensitive to kinking. During transport or removal and installation, ensure that no stress is transferred to bellows element area
arrow
.
Bellows element
Removing
WARNING
Risk of burns.
Parts of the exhaust system may be hot.
Allow exhaust system to cool before removing.
With the ignition switched off, disconnect battery earth strap
Rep. gr.
27
.
Remove heater air duct.
Remove silencer and exhaust tailpipe
Chapter
.
Loosen clamp
Item
.
Unscrew supports
1
and
2
from catalytic converter.
Note
If the catalytic converter is re-used, the supports
1
and
2
must be detached from the engine mounting or cylinder block to avoid damaging the bellows element.
Remove bracket
Item
from catalytic converter and gearbox, and remove catalytic converter downwards.
Installing
Installation is carried out in the reverse order; note the following:
Caution
It is essential to observe the specified installation sequence to avoid damaging the catalytic converter.
Loosen securing nut on engine bracket support.
Loosen securing bolts on cylinder block support.
Fit new gasket to catalytic converter.
Insert catalytic converter.
Bolt bracket
Item
to gearbox.
Locate catalytic converter on turbocharger.
Start catalytic converter securing bolts on bracket
Item
.
Fit new clip.
Locate catalytic converter securing bolts on supports
1
and
2
.
Tighten clamp screw.
Tighten securing nut for engine bracket support.
Tighten securing nut for cylinder block support.
Tighten catalytic converter securing bolts at supports.
Tighten catalytic converter securing bolts at bracket.
Install silencer and exhaust tailpipe
Chapter
.
Specified torques
Chapter
“
Assembly overview - diesel particulate filter (engine codes BJJ, BJK, BJL, BJM)
”
Chapter
“
Assembly overview - silencer (engine codes BJJ, BJK, BJL, BJM)
”
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.
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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.