This all depends on whether the 2005 Focus is a Mark 1 or Mark 2 version of the Focus. So that's the first thing to ascertain. If they're both Mark 2 cars, then there's a very good chance that the boot release will be the same in either (and, therefore, interchangeable) as we're talking about the same car.But even if the 2005 Focus is a Mark 1 model, it would still be worth physically checking to see if the release latches are the same. That's because even though the Mark 1 and Mark 2 Focuses were different cars, many manufacturers (Ford included) carried over some mechanical parts (such as latches and cables) from previous models to save on development costs. A good example of Ford doing this was the succession of 1980s Falcons including the XD, XE and XF models which all used the same exterior door handles. So compare the latch you have with the latch on offer and make sure it operates in the same way and direction, uses the same mounting points and will connect to the same cable. If so, you might just be lucky.