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 - 17138614293, 17137649733, 17137619189. 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 2012 - 2016 BMW 528i L4 2.0L Petrol Turbocharged, 2012 - 2016 BMW 528i xDrive L4 2.0L Petrol Turbocharged. 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. Features -
Premium material.
Direct replacement.
Keeps the engine operating at a normal temperature.

Specifications-
Part Numbers: 17138614293, 17137649733, 17137619189.
Color: Black and Clear
Sensor Included: Yes
Cap Included: Yes
Mounting Bracket included:Yes
Cap Type: Spring Loaded Twist
Material: Quality Plastic
Pressurized: Yes

Compatible with Select BMW Models -

2012 - 2016 BMW 528i L4 2.0L Petrol Turbocharged

2012 - 2016 BMW 528i xDrive L4 2.0L Petrol Turbocharged

1 x Coolant Radiator Reservoir Tank
1 x Cap 1 x Mounting Bracket