【OE Standard】17137787039 Coolant expansion tank Replaceable Part OE No.: 17117573781 17132247553 17111436413 17111468077 17111712669 17117573751 603-535 FRT1901C BM3014102 EPT0018 376755111 EPK0018 S49002 603535 coolant tank. Our reservoir tank meet or exceed OE standards for form,fit and function,Ideal for automotive replacement engine coolant recovery kits. 100% brand new and high quality auto parts with OE grade durability for the ultimate comfortable driving experience. 【Vehicle Fitment】Coolant overflow tank compatible with BMW 323i 1999-2000 2.5L l6, compatible with BMW 328i 1999-2000 2.8L l6, compatible with BMW 323Ci 2000 2.5L 16, compatible with BMW 328Ci 2000 2.8L 16, compatible with BMW 320i 2001-2005 2.2L 16, compatible with BMW 325i 325xi 2001-2005 2.5L 16, compatible with BMW 330i 330xi 2001-2005 3.0L l6, compatible with BMW X3 2004-2010 2.5L 3.0L 16, compatible with BMW 325Ci 330Ci X5 2001-2006. You can check your vehicle's suitability in the Amazon Suitability Filter in the upper left corner. For more information, please check the pictures or the item detail page. 【Material & Function】The overflow tank reservoir is made of safe, high-quality PP plastic material, which can withstand excessive heat and vibration, and its function is to store excess coolant when needed, which helps to reduce oil dilution, fuel consumption, cylinder bore wear, and tailpipe emissions, and improves the efficiency of the heating system. The level of antifreeze inside can be seen directly without opening the radiator cap, avoiding damage to car parts. 【How it works】 Automobile expansion tank is commonly known as the antifreeze reservoir tank, water reservoir tank, is an important part of the cooling system. It contains coolant discharged from the engine cooling system. When the coolant is at a high temperature and expands through the radiator, or there is an excess of coolant, pressure builds up and is released. After the engine cools, the excess fluid flows from the vehicle's coolant tank back to the radiator. 【After-Sales service】 SYKRSS This well-crafted coolant tank reservoir comes with a 12-month warranty and top-notch customer service. If you have any questions about this coolant reservoir, please feel free to contact us and we will get back to you within 48 hours. Note: The package includes 1* Coolant Overflow Tank & 1* Cap & 1* Sensor & 1* Clamp. 【Material & Function】The overflow tank reservoir is made of safe, high-quality PP plastic material, which can withstand excessive heat and vibration, and its function is to store excess coolant when needed, which helps to reduce oil dilution, fuel consumption, cylinder bore wear, and tailpipe emissions, and improves the efficiency of the heating system. The level of antifreeze inside can be seen directly without opening the radiator cap, avoiding damage to car parts.