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 Kia Niro Plug-In Hybrid EX PremiumFACTORY OEM SERVICE PROCEDURE
Repair Procedures: Removal
- Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
- Disconnect the mass air flow sensor connector (A) and the installation clamp (B).
- Remove the mass air flow sensor (C).
Mass air flow sensor mounting bolt:
3.9 - 5.8 N.m (0.4 - 0.6 kgf.m, 2.8 - 4.3 lb.ft)
Mass air flow sensor clamp mounting screw:
2.9 - 4.9 N.m (0.3 - 0.5 kgf.m, 2.2 - 3.6 lb.ft)
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.