In 2010 the producer used simple belts and RF7J motors were quite effective with it. Every 30 000 miles make sure you change in Mazda 5 timing belt. When servicing 5 2.0 buy original Mazda timing belt – it’s not so expensive. You’ll though need exact dimensions of it in 2.0 engine for 5. First thing to look at is 150 number of teeth and also important width of 30 mm.
In any case go to other than 30 mm wide belt for MZR-CD20 motor code. Actually, there are plenty of analog parts for Mazda 5 with 2.0 engine. Check if your parts for service of 2007 Mazda 5 are of good quality.