Yvan Muller
The season saw the Astra challenged by Honda and MG throughout the year, however Yvan Muller and James Thompson again challenged each other for the title. In the end Yvan Muller secured the title. Triple Eight again won the teams and manufacturers award. 2004 would be the final season for the Astra Coupe. Yvan Muller and James Thompson were joined by 2003 Production class champion Luke Hines. The Astra Coupe faced a huge challenge against Honda, MG and newcomers Seat who had Jason Plato returning to the championship. Despite the Astra Coupe at times during the season not the quickest car its consistency allowed Yvan Muller and James Thompson for the third year in a row fight for the title. In the end James Thompson won the title by one point from Yvan Muller. The Astra Coupe would be known as the most successful car to race in the BTCC. For the fourth year in a row Triple Eight won the teams and manufacturers award.