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 Sonata N LineFACTORY OEM SERVICE PROCEDURE
Repair Procedures: Removal
- Turn ignition switch OFF and disconnect the battery negative (-) cable.
- Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "AIR CLEANER ")
- Disconnector the ECM connector (A).
- Loosening the fixing hook (A), remove the ECM (B).
- After removing the installation bolts (A), remove the ECM (B) from the braket.
Tightening torque:
9.8 - 11.7 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.6 lb-ft)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.