Shop Nilight Ignition Coil UF592 C1638 Automotive Replacement Ignition Coils Fit for BMW 325i 325Ci 328i 330Ci 335i 525i 528i 530i 535i 545i 745Li X3 X5 M5 M6 Z4-2.5 3.0 4.4 4.8L Engine 0221504470-6 Pack in high quality, support 2 Years Warranty. The silicone rubber boot of Nilight ignition coils packs contains silicone oil to make it easier for you to replace and install.