See also:

Air bag inflation conditions
Front air bags Front air bags are designed to inflate in a frontal collision depending on the intensity, speed or angles of impact of the front collision. ...

Spark plugs
Make sure to install new spark plugs of the correct heat range. ...

40 MPG POWERTRAIN
Under the hood, the Hyundai Elantra is powered by an all-new 1.8-liter Nu four-cylinder engine with 148 horsepower and 131 lb-ft of torque (145 horsepower and 130 lb-ft of torque for Elantra PZEV) ...