Coolant Expansion Tank - E39 M5 (2000-2003)

Original BMW plastic antifreeze reservior with level sensor

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This part is listed by BMW as BMW part number 17112229114 (17-11-2-229-114) and is described as Coolant Expansion Tank for all E39 M5, which includes 2000, 2001, 2002, and 2003 model year M5. 

This expansion tank is a high failure item on the E39 M5. The plastic gets brittle with age and constant heat cycling from hot to cold. Cracks occur and if you're lucky it will fail with just a slight leak. In many cases an expansion tank failure on the E39 M5 can be quite dramatic, dumping a large amount of coolant rapidly, sending your S62 V8 into an overheating condition without warning. This is why on any E39 M5 with the original expansion tank we recommend replacement with your next cooling system service. This is the Genuine BMW coolant expansion tank with the most upgraded design available. 

Expansion Tank Cap Sold Separately

For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648.

BMW Fitments:

5 Series
E39 (97-03) > M5 (00-03)
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