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.
2021 Hyundai Elantra N Line, Standard TransFACTORY OEM SERVICE PROCEDURE
Repair Procedures: Removal: Notes
- Turn ignition switch OFF and disconnect the battery negative (-) terminal.
- Disconnect the heated oxygen sensor connector (A).
- Remove the heated oxygen sensor (B).
Tightening Torque:
39.2 - 49.0 N.m (4.0 - 5.0 kgf.m, 28.9 - 36.1 lb-ft)
NOTE:- Note that the SST (Part No.: 09392-2H100 or 09392-1Y100) is useful when removing the heated oxygen sensor.
Factory Service Tools
Use the Manual With the Right Hardware
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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.