Football Federation Australia is bracing for the prospect of losing its biggest sponsor, with Hyundai prepared to walk away from a 15-year affiliation with Australian soccer when their current deal expires in June.

The Korean car manufacturer's naming rights sponsorship deal is worth $6 million a year and while FFA are desperately trying to negotiate an extension, it is looking increasingly likely that they will have to find a new major sponsor.

Hyundai is preparing to walk away from its long association with Australian soccer. Credit:AAP

Sources close to the negotiations suggest Hyundai Australia have informed FFA of their intention not to renew their deal when it expires in just four months.

However, there remains a chance they may extend their sponsorship for one more year until June 2021. FFA are hoping to at least negotiate a short-term agreement that will provide them with enough time to find another major sponsor without copping an immediate and significant hit to their bottom line.