In your 2012 N20 powered B. M. Ws, valve cover is a plastic design. This means that with age, mileage, and thousands of heat cycles, the plastic valve cover will become brittle and frail, and will likely develop cracks. You have to repalce the plastic valve cover every 100K miles This performance aluminum valve cover and gasket kit is a premium upgrade version to be of an impressive manufacturing quality. And this UPGRADE ALUMINUM Cylinder Head Cover kit installs and functions more durable than the OEM plastic kit Valve Cover For BMW 2012-2016 528i 528i xDrive, 2012-2016 328i, 2014-2016 328i GT xDrive, 2013-2016 328i xDrive, 2013-2018 320i 320i xDrive, 2016-2017 x5, 2013-2017 x3, 2013-2015 X1 2014-2016 428i 428i xDrive, 2015-2016 428i xDrive Gran Coupe 428i Gran Coupe, 2012-2016 z4, 2014-2016 228i, 2015-2016 228i xDrive, 2015-2018 X4 OE Reference Replaces part numbers 11127588412 offering a trustworthy and exact replacement for your engine valve cover needs Notes: Valve Cover PCV Valve is part of this valve cover.; Includes : Valve Cover Gasket Set , Valve Cover Bolts , Oil Cap Friendly Reminder: Please do not tighten the valve cover bolts too much during installation Notes: Valve Cover PCV Valve is part of this valve cover.; Includes: 1 Valve Cover Gasket Set , Valve Cover Bolts , Oil Cap Material : Aluminum Fitment N20 2.0L Compatible with 2012-2016 BMW 328i Compatible with 2014-2016 BMW 328i GT xDrive Compatible with 2013-2016 BMW 328i xDrive Compatible with 2012-2016 BMW 528i Compatible with 2012-2016 BMW 528i xDrive Compatible with 2016-2017 BMW X5 xDrive40e Compatible with 2012-2016 BMW Z4 sDrive28i Compatible with 2013-2017 BMW 320i xDrive Compatible with 2013-2018 BMW 320i Compatible with 2015-2016 BMW 228i xDrive Compatible with 2014-2016 BMW 228i Compatible with 2014-2016 BMW 428i Compatible with 2015-2016 BMW 428i Gran Coupe Compatible with 2015-2016 BMW 428i xDrive Gran Coupe Compatible with 2014-2016 BMW 428i xDrive Compatible with 2013-2017 BMW X3 Compatible with 2015-2018 BMW X4 Compatible with 2013-2015 BMW X1