【Cross Reference】This filter Installed Inside the cabin, Compatible with select bmw cabin air filter, Replacement for 64119237159, 9237159, CU1721-2, Always check fitment using the vehicle filter. 【Compatible Vehicle】Fits X3 xDrive28i (2012-2017), X3 xDrive28i (2011-2012), X3 xDrive35i (2011-2017), X4 xDrive28i (2015-2018), X4 xDrive35i (2015-2016), X4 M40i (2016-2018). 【Premium Protection】Made of premium fibre, which can multiple filtration and double-layer purification for the air, enhance air quality and ventilation in your vehicle cabin, provide clean air for driver and passengers. 【Recommend to Replace】 Recommend by changing your vehicle's cabin air filter at least every 10000 miles (or as recommended in your car owner's manual), to ensure your vehicle's cabin has the clean air. Compatible Vehicle and Year List:
X3 (F25)
X3 xDrive28i 2012→2017 2.0L
X3 xDrive28i 2011→2012 3.0L
X3 xDrive35i 2011→2017 3.0L
X4 (F26)
X4 xDrive28i 2015→2018 2.0L
X4 xDrive35i 2015→2016 3.0L
X4 M40i 2016→2018 3.0L