As this was a built in fridge, the only tricky part was removing the old hinges. If you are replacing hinges and don't want to, or can't, completely remove the fridge easily from its housing, then get yourself a right angled screw driver before starting.
Once you have access, the replacement was really simple and these hinges, which are excellent quality, fitted perfectly. The fridge was a De Dietrich model which was 30 years old and had had a snapped hinge. We couldn't find a replacement fridge of the same size, so replacement hinges were invaluable.