America’s love affair between the automobile and AM radio — a century-long romance that provided the soundtrack for lovers’ lanes, kept the lonely company with ballgames and chat shows, sparked family singalongs and defined road trips — is on the verge of collapse, a victim of galloping technological change and swiftly shifting consumer tastes.

The breakup is entirely one-sided, a move by major automakers to eliminate AM radios from new vehicles despite protests from station owners, listeners, first-responders and politicians from both major parties.

Automakers, such as BMW, Volkswagen, Mazda and Tesla, are removing AM radios from new electric vehicles because electric engines can interfere with the sound of AM stations. And Ford, one of the nation’s top-three auto sellers, is taking a bigger step, eliminating AM from all of its vehicles, electric or gas-operated.

Some station owners and advertisers contend that losing access to the car dashboard will indeed be a death blow to many of the nation’s 4,185 AM stations — the possible demise of a core element of the nation’s delivery system […]