I=40:11=3,64 Final drive (front axle) Teilegruppe Front axle, front suspension Spring strut, add-on parts BMW Genuine Part 31 50 1 428 688 Product 31-50-1-428-688 Manufacturer number 1 428 688 supply number 1-428-688 installation location: Front Axle Front Suspension/ Spring Strut Add-On Parts