PPNZQAUT 17111436381 Engine Coolant Reservoir Tank With Cap Compatible With 2001 - 2003 BMW 525i L6 2.5L / 530i L6 3.0L, 1999 - 2000 BMW 528i / 528it L6 2.8L | Overflow Reservoir?603-536

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• What Does a Coolant Reservoir Do? - A coolant reservoir is a small plastic tank that is connected to the radiator of a car’s cooling system. Its primary function is to provide a space for excess coolant to expand and contract as the engine heats up and cools down. Keep the engine operating at a normal temperature.
• Part Numbers - 603-536, 603536, 17111436381. This radiator surge tank matches the fit and function of the original part. This is NOT a genuine part, it's an aftermarket replacement part.
• Compatible with Select BMW Models - This radiator overflow tank is compatible with BMW E38 E39 series -- 2001 - 2003 BMW 525i L6 2.5L, 1999 - 2000 BMW 528i L6 2.8L, 1999 - 2000 BMW 528it L6 2.8L, 2001 - 2003 BMW 530i L6 3.0L. Please check the description or enter Year/Make/Model on Amazon's Fitment Filter system to confirm your compatibility.
• Replacement Instruction - Turn off and cool down the car, disconnect the drain line, remove the retaining bolts and swap in the new reservoir tank. Professional installation is highly recommended.
• Durable and Long Lasting - This Coolant Recovery Tank is manufactured from quality materials, durable and long lasting. It is thoroughly tested to ensure optimum fit and performance on specific vehicle applications.