Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2012 Honda Insight BaseFACTORY OEM SERVICE PROCEDURE

Warm Up TWC Removal/Installation

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, B).

Fig 1: Mounting Bolts On Warm Up TWC With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the cowl cover and the under-cowl panel (see COWL COVER REPLACEMENT ).
Remove the EGR pipe (see EGR PIPE REMOVAL AND INSTALLATION ).
Remove the A/F sensor (Sensor 1) (see A/F SENSOR REPLACEMENT ).
Remove the cover (A).

Fig 2: WU-TWC, Cover, Bolts And Nuts With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
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).

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.