power steering
US /ˈpaʊər ˌstɪrɪŋ/
UK /ˈpaʊər ˌstɪrɪŋ/

1.
servosterzo
a system in a vehicle that uses a hydraulic or electric mechanism to reduce the effort needed to steer the wheels
:
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Modern cars usually come equipped with power steering.
Le auto moderne sono solitamente dotate di servosterzo.
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My old truck doesn't have power steering, so it's harder to turn.
Il mio vecchio camion non ha il servosterzo, quindi è più difficile da girare.