Nevertheless, you need optimal size for 1.6 motors installed in 3. Every 30 000 miles make sure you change in Mazda 3 timing belt. 137 of teeth are used in original part and it has 25 mm width. In 2004 the producer used simple belts and Y603 motors were quite effective with it. Wise decision is to buy Mazda’s factory timing belt for 3 1.6 to service. Also look at profile type – it’s CPPN, gap division should be 9.525 N/mm.
Always buy toothed belt for Y603 engine code with recommended width at 25 mm. It’s impossible to provide 9.525 N/mm gap division with other than CPPN type of belt profile. You may find lots of good analog Mazda 3 parts made specially for 1.6 motor. So, during servicing your 2009 Mazda 3 purchase quality materials.