You’d better measure the battery before you buy one. The 151R size is the only battery in the world manufactured just for the Honda Fit. Honda is the only supplier of this size. Some people have altered their battery compartments in 2007 and 2008 Fits to fit the 51R or other snowmobile sealed batteries. But, do you really want the headache? I have a 2008 and 2009 Fit. I know that the 2009 cannot fit a 51R battery by almost an inch. I haven’t looked into the 2008 model which would be the same as your 2007. Measure before you buy is my suggestion.