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 MANUALSMERCURY1998SABLE V6-3.0L DOHC VIN SREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIR

1998 Mercury Sable V6-3.0L DOHC VIN S

Oxygen Sensor: Service and Repair

1998 Mercury Sable V6-3.0L DOHC VIN SSECTION Service and Repair

SPECIAL SERVICE TOOL(S) REQUIRED

Description
- Oxygen Sensor Wrench

Tool Number
- 303-476 (T94P-9472-A)

REMOVAL
1. Disconnect battery ground cable.
2. Remove cowl extension and right side of leaf screen.
3. Raise vehicle on hoist.
4. Disconnect engine control sensor wiring from Heated Oxygen Sensors (HO2S). Do not remove harness connectors from the brackets.
5. Remove heated oxygen sensors from exhaust manifolds using Oxygen Sensor Wrench 303-476 (T94P-9472-A).

NOTE: If excessive force is needed to remove a heated oxygen sensor, lubricate with penetrating oil prior to removal.

INSTALLATION
1. Follow removal procedure in reverse order.
2. Apply a coating of anti-seize compound to threads of heated oxygen sensor. Tighten heated oxygen sensors to 34-46 Nm (26-33 lb-ft).

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.