Catalytic Converter System
Warm Up Three Way Catalytic Converter (WU-TWC) and Under-floor Three Way Catalytic Converter (Under-floor TWC)
The WU-TWC and the under-floor TWC convert hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) in the exhaust gas to carbon dioxide (CO2), nitrogen (N2), and water vapor.
WU-TWC (ATTACHED TO THE CYLINDER HEAD)

UNDER-FLOOR TWC

Radiator Connecting Pipe Replacement
Drain the engine coolant.
Remove the thermostat housing.
Remove the connecting pipe (A).
Install the connecting pipe with a new O-ring (B).
...
Washer Reservoir Replacement
Remove the front bumper.
Disconnect the 2P connector (A) and tubes (B) from the washer motor (C)
and the washer fluid level switch (Canada models).
...
Floor Mats
If you remove a floor mat, make sure to re-anchor it when you put it back in
your vehicle.
A non-Honda floor mat may not fit your vehicle properly. This could prevent the
proper operation of th ...