Replacement Radiator Coolant Expansion Tank - The coolant tank contains coolant fluid that is discharged from the cooling system attached to the engine. Pressure builds up and released when the coolant is hot and expanding through the radiator and when the engine cools down, the excess fluid flows back into the radiator from the coolant tank of your vehicle. If you are experiencing leaks, low levels of coolant, and an overheating engine then you may have a problem with your coolant tank. Compatible Replacement for BMW Vehicles - 2004-2005 BMW 525i Base 2.5L
2006-2007 525i 3.0L
2006-2007 525xi 3.0L
2008-2010 528i 3.0L
2009-2010 528i xDrive 3.0L
2008 528xi 3.0L
2004, 2005, 2006, 2007 530i 3.0L
2006-2007 530xi 3.0L
2008, 2009, 2010 535i 3.0L
2009-2010 535i xDrive 3.0L
2008 535xi 3.0L
2004-2005 545i 4.4L
2006-2010 550i 4.8L
2004-2005 645Ci 4.4L
2006-2010 650i 4.8L
. Replaces Part#17-13-7-519-219, 17 13 7 519 219, 17137519219, 376789731, CRT205000S, 17137542986, 17-13-7-542-986, 17 13 7 542 986, 17117639021, 17137516004, 603-351, 603351 commonly found on popular 330i, X3, X5, 38iC, 325xi vehicles including models 04, 05, 06, 07, 08, 09, 10. The radiator coolant overflow expansion tank can easily be located on the engine bay mounted on the engine near and connected to the radiator. OEM Fit, Quality, Finish - While this is not a genuine OEM part, it is a direct replacement and will look, fit, and work exactly like the factory part. The radiator coolant overflow expansion tank's common issue is leakage which can cause an overheated engine. Safely turn off the engine and let the temperature drop before opening the radiator's cap or the coolant tank to reduce and release the pressure safely. Lifetime Warranty - This radiator coolant overflow expansion tank comes complete with a lifetime warranty. If the part ever fails on your 525i, 525xi, 528i, 528i xDrive, 528xi, 530i, 530xi, 535i xDrive, 535xi, 545i, 550i, 645Ci or 650i simply contact us for a replacement. Save time and money off of dealer prices by purchasing this part and taking advantage of our warranty. See our website for full details. The radiator coolant overflow expansion tank contains coolant fluid that is discharged from the cooling system attached to the engine. Pressure builds up and releases when the coolant is hot and expands through the radiator and when the engine cools down, the excess fluid flows back into the radiator from the coolant tank of your vehicle. If you are experiencing leaks, low levels of coolant, and overheating engine then you may have a problem with your coolant reservoir tank. The radiator coolant overflow expansion tank can easily be located on the engine bay mounted on the engine near and connected to the radiator. Compatible with the Following Vehicles: 2004-2005 525i 2.5L 2006-2007 525i 3.0L 2006-2007 525xi 3.0L 2008-2010 528i 3.0L 2009-2010 528i xDrive 3.0L 2008 528xi Base 3.0L 2004-2007 530i 3.0L 2006-2007 530xi 3.0L 2008-2010 535i 3.0L 2010 535i GT 3.0L 2009-2010 535i xDrive 3.0L 2008 535xi 3.0L 2004-2005 545i 4.4L 2006-2010 550i 4.8L 2004-2005 645Ci 4.4L 2006-2010 650i 4.8L Replaces Part Numbers: 17-13-7-519-219, 17 13 7 519 219, 17137519219, 376789731, CRT205000S, 17137542986, 17-13-7-542-986, 17 13 7 542 986, 603-351 This is a compatible replacement part manufactured by AA Ignition. This coolant reservoir tank is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this radiator coolant overflow expansion tank fits.