NOTE: If the warm up TWC is damaged internally, inspect the under-floor TWC for debris.
Raise the vehicle on a lift.
Remove the bolts (A).

Lower the vehicle.
Remove the A/F sensor (Sensor 1).
Remove the EGR pipe.
Remove the cover (A).

Remove the bolts (B) and the nuts (C).
Remove the WU-TWC (D).
Install the parts in the reverse order of removal with new gaskets (E).
Instrument Panel
Gauges/Information Display/System Indicators
Lights Reminders
System Indicators
System Indicators
System Indicators
System Indicators
...
Front Passenger's Weight Sensor Replacement (Part-2)
When tightening the TORX nuts (A), begin with ?, and tighten them in a
crisscross pattern in two or more steps.
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"Honda_SymbolMarke ...
Carbon Monoxide Hazard
Your vehicle’s exhaust contains carbon monoxide gas. Carbon monoxide should not
enter the vehicle in normal driving if you maintain your vehicle properly and follow
the information on this page. ...