How To replace a bmw x5 e70 expansion tank full diy

In this video I show you how to easily replace the expansion tank on a BMW X5 E70 with the N55 6 cylinder engine. I also demonstrate how to correctly vacuum bleed the system to ensure no air pockets remain in the system. 


Parts required And Recommended Tools

BMW X5 E70 With The N55 Engine: Expansion Tank

BMW Expansion Tank Part 17137552646 BMW X5 E70

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OEM Quality.  Precision-molded to OE dimensions to ensure compatibility with original sensors and connections.  Quality materials resist engine heat and harsh cooling system environment.  24-Month / Unlimited Mileage Warranty 

BMW Part Number:


Vacuum Bleeder Kit


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 Utilizing an air compressor you can perform a leak test, eliminate airlocks and refill the entire system including the heater core in less than two minutes.

OEM Recommend Tool

BMW Coolant

BMW OE Coolant Anti Freeze Coolant

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BMW OEM Blue Cooant

Coolant Must Be Mixed  50/50

BMW X5 Expansion Tank Cap


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BMW Expansion Tank Cap

OEM Part  17137516004