LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2003 >> Protege L4-2.0L DOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Catalytic Converter >> Service and Repair
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Catalytic Converter: Service and Repair

WARNING: Hot engine and exhaust system can cause serious burn. Turn off the engine and wait until it and the exhaust system are cool before removing the exhaust system.

1. Disconnect the battery negative cable.

Exhaust System - ZM:




Exhaust System - FS:




2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.




Exhaust Manifold Removal Note
1. Remove the air cleaner and air hose.
2. Remove bolt A on the water bypass pipe before removing the exhaust manifold.

Tightening torque: 64 - 89 N.m {6.5 - 9.1 kgf.m, 48 - 65 ft.lbf}




Exhaust Manifold Gasket Installation Note
1. To install the exhaust manifold gasket, make sure that the bead side of the gasket is facing the exhaust manifold side.