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

Under-Floor TWC Removal/Installation

Raise the vehicle on a lift.
Remove secondary HO2S (Sensor 2) (see A/F SENSOR REPLACEMENT ).
Remove the nuts (A) and the bolts (B).

Fig 1: Under-Floor TWC, Cover, Nuts And Bolts With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the under-floor TWC (C).
Remove the cover (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.