Toyota 17140-0P090 Right Exhaust Manifold Sub-Assembly

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The catalytic converter is an emission control device added to the exhaust system to reduce pollutants from the exhaust gas stream. There are two types of converters: the conventional oxidation catalyst, which reduces hydrocarbons (HC) and carbon monoxide (CO), and the three-way catalyst, which lowers the levels of oxides of nitrogen (Nox), hydrocarbons (HC), and carbon monoxide (CO). For models from 2001 to 2006, there are three catalytic converters: a warm-up three-way catalytic converter (WU-TWC) in the front exhaust manifold, another in the pipe from the rear manifold, and the final three-way converter in the main exhaust pipe.

Disconnect any interfering wire clamps.

Disconnect the negative cable from the battery.