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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA2001626 ES V6-2.5L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSCATALYTIC CONVERTERSERVICE AND REPAIR
2001 Mazda 626 ES V6-2.5L DOHC
Catalytic Converter: Service and Repair
2001 Mazda 626 ES V6-2.5L DOHCSECTION Service and Repair
EXHAUST SYSTEM REMOVAL/INSTALLATION [FS]
WARNING: When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait until they are cool before removing or installing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
EXHAUST SYSTEM REMOVAL/INSTALLATION [KL]
WARNING: When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait until they are cool before removing or installing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
Heated Oxygen Sensor (Front RH), Heated Oxygen Sensor (Front LH) Removal Note
1. Use the SST to remove the HO2S.
Warm Up Three Way Catalytic Converter (RH), Warm Up Three Way Catalytic Converter (LH) installation Note
1. Tighten the bolts and nuts in the order shown.
Heated Oxygen Sensor (Front RH), Heated Oxygen Sensor (Front LH) Installation Note
1. Use the SST to install the HO2S.
WARNING: When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait until they are cool before removing or installing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
EXHAUST SYSTEM REMOVAL/INSTALLATION [KL]
WARNING: When the engine and exhaust system are hot, they can badly burn. Turn off the engine and wait until they are cool before removing or installing the exhaust system.
1. Disconnect the negative battery cable.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
Heated Oxygen Sensor (Front RH), Heated Oxygen Sensor (Front LH) Removal Note
1. Use the SST to remove the HO2S.
Warm Up Three Way Catalytic Converter (RH), Warm Up Three Way Catalytic Converter (LH) installation Note
1. Tighten the bolts and nuts in the order shown.
Heated Oxygen Sensor (Front RH), Heated Oxygen Sensor (Front LH) Installation Note
1. Use the SST to install the HO2S.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.