Part Type: Engine Coolant Reservoir. Manufacturer: Dorman. 2004 Mazda 3 Engine: 2.0LL L4 Naturally Aspirated; Position: Front;. 2004 Mazda 3 Engine: 2.3LL L4 Naturally Aspirated; Position: Front;. 2005 Mazda 3 Engine: 2.0LL L4 Naturally Aspirated; Position: Front;.