For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for your vehicle.

All specifications (sizes and pressures) can be found on a label attached to the driver's side center pillar.
Tires and Wheels
Recommended Cold Tire Inflation PressuresHyundai Elantra AD (2016-2020) Service Manual: Side Impact Sensor (SIS) Components and Components Location
Components
1. Front Pressure Side Impact Sensor (P-SIS)2. Front Gravity Side Impact Sensor (G-SIS)
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Hyundai Elantra AD (2016-2020) Service Manual: Engine Control Module (ECM) Repair procedures
Removal
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When replacing the ECM, the vehicle equipped withthe immobilizer must be performed procedure asbelow.
[In the case of installing used ECM]
1) Perform "ECM Neutral mode" procedure with GDS.
(Refer to Body Electrical System - "Immobilizer System")
2) After ...