Your Mazda 3's cooling system is critical to keep your engine functioning at an optimal temperature. The radiator cap is a protective cap that acts as a pressure valve. It acts as a release valve to open at a maximum pressure in order to allow heat to escape from the radiator and to also allow excess coolant fluid to overflow into the tanks. A properly functioning radiator cap will help protect your car's engine from overheating.
FITS: 2004/2005/2006/2007/2008/2009/2010/2011/2012/2013 Mazda 3
2004/2005/2006/2007/2008/2009/2010/2011/2012/2013 Mazda 3 Sport
2007/2008/2009/2010/2011/2012/2013 Mazdaspeed 3
Part #: LF50-15-205A