Features: 1.According to the original factory specifications, replacing OE number is 11538648791 for reference. 2.The thermostat could perfectly fit for 228i 2014?2016, for 320i 2013?2016 and other models. 3.Follow the original standard strictly, design to have the same form, fit and function as original one. 4.Match for the original car well, you can directly replace the broken or old one, greatly saving your time. 5.Manufactured by superior quality ABS materials with stable performance and high reliability and strength. Specification: Item Type: Engine Coolant Thermostat Material: ABS OEM: 11538648791, 11537633476, 11537633477, 11538636595 Fitment: For 228i 2014-2016 For 320i 2013-2016 For 328i 2012-2016 For 328i GT 2014-2016 For 428i 2014-2016 For 528i 2012-2016 For X1 2013-2015 For X3 2013-2016 For X4 2015-2016 For X5 2016-2016 For Z4 2012-2016 PackageList: 1 x Engine Coolant Thermostat Note: 1. Please double check the part number of your item, matching information is for reference only. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks! 3. Please note that the new type and old type of this product will be sent randomly,and make sure you will not mind before ordering.