Red Bull's Mark Webber will have to overcome a five place grid penalty at the start of the Belgian Grand Prix in Spa on Sunday, after being handed a penalty for changing his gearbox out-of-sequence after he finished last month's Hungarian Grand Prix.

The official FIA statement regarding Webber's penalty was released on Friday evening, and read: "The above driver [Webber] did finish the last race in Budapest and this gearbox change was before the five consecutive events expired."

Webber previously had to change his gearbox at the German Grand Prix, which means the latest gearbox swap falls far short of making the required lifespan of five consecutive races.

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Michael Schumacher and Kamui Kobayashi will also need new gearboxes this weekend, but as they have already run five races with their previous units they will not face a similar starting grid demotion to Webber's.

Webber had also been served a penalty for his previous gearbox swap at Hockenheim. That was also for failing to comply with Article 28.6a of the 2012 Formula One Sporting Regulations.

Although the turnover in gearboxes suggests a potential reliability issue in that part of the 2012 Red Bull car, Webber himself has actually enjoyed a remarkably good record this season and has yet to retire from any of the 11 races.

The penalty means that the best Webber can manage is to start from the third row of the grid for the Belgian Grand Prix, assuming that he sets the fastest time in Saturday's qualifying session.