A steering wheel assembly for a vehicle includes a steering wheel and an airbag that is supported by the steering wheel. The airbag is inflatable away from the steering wheel in an inflation direction. An airbag tether includes a first end coupled to the steering wheel, and a second end spaced from the first end and coupled to the steering wheel. The airbag is disposed between the steering wheel and the airbag tether. During a frontal impact of the vehicle, the airbag tether may be positioned independent of steering wheel position to restrict inflation of the airbag adjacent a thorax of a driver of the vehicle.