This product is specifically designed for the BYD Qin PLUS DM-i super hybrid system. The coolant reservoir tank (expansion tank) is used to store and replenish coolant in the cooling system. When the engine temperature rises, the expanding coolant flows into the tank; when the temperature drops, the coolant is drawn back into the radiator, maintaining pressure balance in the cooling system and preventing coolant loss or overflow.

This product features a square structural design and is made of PP high-strength, high-temperature resistant plastic with excellent corrosion resistance and anti-aging properties. The translucent/semi-transparent body allows for easy fluid level monitoring, with clear MAX and MIN markings on the tank for routine inspection. As a professional manufacturer of automotive cooling system parts, we develop and produce strictly according to BYD OEM technical standards, with IATF 16949 quality system certification.