This genuine BMW engine seal is a must-have for any BMW 1, 2, 3, 4 X1, X2, X3, or X4 owner looking to replace their diesel engine PCV breather. Made with high-quality materials and designed to fit perfectly, this engine seal ensures a proper seal for your engine. The manufacturer part number and reference OE/OEM number for this engine seal are 11127823944. Whether you're replacing a worn-out engine seal or upgrading your engine, this genuine BMW engine seal is the perfect choice. Buy now and enjoy a reliable and high-performing engine seal for your BMW.