The Los Angeles Times described Pierce Brosnan as "a dashing Bond-like character" in the late 1980s Diet Coke commercials he appeared in. The 21st February 1988 edition reported that Brosnan appeared in "Diet Coke commercials in which he portrays a dashing Bond-like character"
According to James Bond Wiki website, on 25th January 1987, "Pierce Brosnan stars in a US James Bond-like Diet Coke® commercial premiering during Super Bowl XXI."
This Bond like commercial predates in eight years the future role of Pierce Brosnan as 007.