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 Accent SELFACTORY OEM SERVICE PROCEDURE
Engine Control System
ENGINE CONTROL SYSTEM - TIGHTENING TORQUES SPECIFICATION
| Item | kgf.m | N.m | lb-ft |
|---|---|---|---|
| ECM installation nuts [A/T] | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| ECM installation screws [M/T] | 0.092 ~ 0.096 | 0.9 ~ 0.95 | 0.6 ~ 0.7 |
| ECM bracket installation bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| ECM bracket installation nut | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| Manifold absolute pressure sensor installation bolt | 0.7 ~ 0.9 | 6.9 ~ 8.8 | 5.1 ~6.5 |
| Engine coolant temperature sensor installation | 3.0 ~ 4.0 | 29.4 ~ 39.2 | 21.7 ~ 28.9 |
| Crankshaft position sensor installation bolt | 0.8 ~ 1.2 | 7.8 ~ 11.8 | 5.8 ~ 8.7 |
| Camshaft position sensor (Bank 1/Intake) installation bolt | 0.8 ~ 1.2 | 7.8 ~ 11.8 | 5.8 ~ 8.7 |
| Camshaft position sensor (Bank 1/Exhaust) installation bolt | 0.8 ~ 1.2 | 7.8 ~ 11.8 | 5.8 ~ 8.7 |
| Knock sensor installation bolt | 1.9 ~ 2.5 | 18.6 ~ 24.5 | 13.7 ~ 18.1 |
| Heated oxygen sensor (Bank 1/Sensor 1) installation | 4.0 ~ 5.0 | 39.2 ~ 49.1 | 28.9 ~ 36.2 |
| Heated oxygen sensor (Bank 1/Sensor 2) installation | 4.0 ~ 5.0 | 39.2 ~ 49.1 | 28.9 ~ 36.2 |
| ETC (Electronic Throttle Control) module installation bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| CVVT oil control valve (Bank 1/Intake) installation bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| CVVT oil control valve (Bank 1/Exhaust) installation bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| Ignition coil installation bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
| Variable intake solenoid valve bracket installtion bolt | 1.0 ~ 1.2 | 9.8 ~ 11.8 | 7.2 ~ 8.7 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.