Genuine Toyota Avalon Catalytic Converter

Toyota Avalon Catalytic Converter Parts Questions & Answers

• Front Exhaust Pipe Assembly
  17410-0A220
  Q: What is a catalytic converter and how is it checked and replaced?

  A: The catalytic converter is an emission control device in the exhaust system that reduces pollutants. There are two types: oxidation catalyst, which reduces HC and CO levels, and three-way catalyst, which also decreases NOx. Checking the converter requires expensive equipment. During underbody servicing, inspect for leaks, corrosion, and damage. If any damage is found, replace the converter. To diagnose a restricted converter, use a vacuum gauge to assess the impact of a blocked exhaust on the intake vacuum. Connect the gauge to a vacuum source, warm the engine, and note the vacuum reading at idle and after opening the throttle. If the reading is more than one in-Hg lower after the fourth test, there may be a restriction. When replacing the converter, spray the nuts on the exhaust flange studs before removing them, and then proceed to remove the nuts and separate the converter from the exhaust system. The installation process is the reverse of the removal procedure.
• Right Exhaust Manifold Sub-Assembly
  17140-0P041
  Q: How to replace the exhaust manifold and catalytic converter?

  A: Because of a Federally mandated extended warranty that covers emissions related components such as the catalytic converter, check with a dealer service department before replacing the converter at your own expense. The catalytic converter(s) are incorporated into the exhaust manifold(s). Exhaust manifold replacement procedure. Remove the upstream Oxygen Sensor(s). Remove the exhaust manifold(s). The catalytic converter(s) is an integral part of the exhaust manifold and cannot be replaced separately. If the catalytic converter(s) is bad, the exhaust manifold must be replaced. Installation is the reverse of removal.