The original James Bond car is an Aston Martin DB5, driven by Sean Connery in Goldfinger and Thunderball. When the action shifted to Japan for You Only Live Twice he hopped a ride in a one-off Toyota 2000GT convertible.
George Lazenby drove an Aston Martin DBS in On Her Majesty's Secret Service.
In Diamonds Are Forever Sean Connery drove a 1970 Mustang Mach 1 through downtown Las Vegas.
Roger Moore drove a Lotus Esprit in The Spy Who Loved Me and For Your Eyes Only.
Timothy Dalton drove an Aston Martin V8 Vantage and V8 Volante in The Living Daylights.
Eon Productions, the company that makes the Bond movies, struck a deal with BMW for the first three Pierce Brosnan movies.
But, the iconic Bond car has always been the Aston Martin DB5. Ford knew this, and signed a deal with Eon to have Bond drive an Aston in Die Another Day. And with this corporate sponsorship, pretty much every single vehicle to get any screen time in the movie was from some Ford brand or another. Halle Berry had a pink Thunderbird, there were lots of Volvos and Range Rovers and everything else from the Ford stables.
So for the next couple movies, or for however many more are made that Ford sponsors, I'd say it's a solid bet that Bond will drive an Aston of some sort or another, and any other Ford vehicle featured prominently will be driven by someone else.
So, about that Jaguar XK...