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.
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HOMESERVICE MANUALSMAZDA1990626 L4-2184CC 2.2L SOHC F2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIR
1990 Mazda 626 L4-2184cc 2.2L SOHC F2
Oxygen Sensor: Service and Repair
1990 Mazda 626 L4-2184cc 2.2L SOHC F2SECTION Service and Repair
Oxygen Sensor:
REMOVAL
1. Disconnect harness terminal.
2. Remove sensor with suitable socket or wrench.
INSTALLATION
1. Apply a thin coating of anti-seize compound to the threads.
NOTE: Do not contaminate sensing tip with compound.
2. Install sensor and torque it to 22 - 36 ft lb (29 - 49 Nm).
3. Apply a thin coating of dielectric compound to the connector.
4. Connect harness terminal.
RENDER: 1.0x
NO RELATED
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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.