Compatible For: Mazda 3 2004-2013 OE Numbers: LF5015350, LF5015350A, LF5015350B, LF5015350C, LF8B15350A, LF8B15350B, LF8B15360A, LFR515360, 603-043 Product overview - Function: Coolant radiator reservoir tank designed to convert the cooling system into a permanent closed system to reduce coolant loss. - Compatibility: Specifically fits Mazda 3 models from 2004 to 2013. - Material and durability: Made with high strength material for long service life. Key benefits - Reduces coolant loss by maintaining a closed system. - Improves reliability and reduces the need for frequent top-ups. - Durable construction for lasting performance in the cooling system. Use scenarios - Replacing a worn or leaking reservoir on a Mazda 3 2004-2013 to restore coolant containment during daily driving. - On long highway trips to minimize coolant top-ups and lower the risk of overheating. - In hot climates or under heavy engine load where stable coolant retention supports consistent engine cooling. Notes - This is the coolant radiator reservoir tank compatible with the listed OE numbers and Mazda 3 years.