The sound comes from the long-running advertising for O'Reilly Auto Parts, a major American auto parts retailer whose catchy store jingle has played in television and radio commercials for years. Online, creators lifted the short chorus from those ads and turned it into a meme, using it to introduce repairs, car content, and surprise arrivals in short videos. Its appeal lies in instant recognition, since many viewers have heard the tune in real commercials, so a few seconds are enough to set up the joke without explanation.