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How do you replace the catalytic converter on a 2001 Mazda millenia S?

Replacing the catalytic converter on a 2001 Mazda Millenia S may be a complex task if you do not have prior car repair experience. It's best to take the car to a professional mechanic. However, if you're determined to do it yourself, here are some general instructions:

Tools:

- Wrench set

- Socket set

- Jack and jack stands

- Safety glasses

- Gloves

- Safety mask

Replacement Guide:

1. Prepare the Car:

- Ensure the engine is cool and the car is parked on flat ground.

- Wear safety gear (glasses, gloves, mask) as exhaust parts may have residues.

- Disconnect the car battery to avoid any electrical issues during the process.

2. Lift Up the Car:

- Safely lift the car using a jack and place it on jack stands to access the undercarriage.

3. Locate the Catalytic Converter:

- Follow the exhaust pipe from the engine towards the rear of the car. The catalytic converter is typically located in the center of the vehicle, under the car. It's a bulky metal cylinder.

4. Disconnect the Oxygen Sensors:

- The catalytic converter will have one or two oxygen sensors. Disconnect them by unplugging the electrical connectors and unscrewing them with a wrench.

5. Disconnect the Exhaust Pipes:

- Unbolt the exhaust pipes that connect to the catalytic converter. Some may have bolts or nuts that need a socket wrench to loosen.

6. Remove the Catalytic Converter:

- Once all the connections to the catalytic converter are loose, you can remove it. Be careful as it may be heavy. It may be secured by a bracket that needs to be removed as well.

7. Install the New Catalytic Converter:

- Fit the new catalytic converter in place. Connect all the components in the reverse order of disassembly. Tighten all bolts securely.

8. Reinstall Oxygen Sensors:

- Screw in oxygen sensors and reconnect the electrical connectors you disconnected earlier.

9. Lower the Car:

- Carefully lower the car off the jack stands and remove them.

10. Reconnect Battery:

- Reconnect the car's battery.

Remember, this is just a general guide. Your model may have specific instructions or different components to remove or install. It's always recommended to refer to a repair manual specific to your vehicle or take it to a qualified mechanic if you're not comfortable performing this task yourself.