BMW i8 Forums BMW i8 General Discussion How to replace the door struts in the BMW i8 Thread Tools Bookmarks twitter Facebook Digg Google StumbleUpon del.icio.us My Yahoo! BMW shut down NewTIS. DIY'ers beware! If your door struts are weak, and your door doesn't open all the way up on your BMW i8, you can use these instructions in order to replace the door struts. This Genuine BMW Genuine BMW Gas Door Strut (Mfg#51227465481) fits BMW I12 i8. Shop Struts for BMW i8 with eBay Guaranteed Fit. Great deals. Massive selection from top brands on eBay.com. Find the right Genuine Strut Assembly for your 2014-2020 BMW i8 with BMW Direct Parts. Part# 51. When these struts fail, your door will have issues staying open. Replace these and get your beloved I8 back to its best form. Not For Sale Not For Sale 2 Lower Pad 31-33-6-775-582 BMW Lower Insulator, Left MSRP $14.76 $11.44 Add to Cart MSRP $14.76 $11.44 Add to Cart 3 Dust Shield 31-30-6-865-999 BMW Boot, Left. This part is listed by BMW as BMW part number 51227465481 (51-22-7-465-481) and is described as Genuine BMW Support Shock (gas-pressurized spring) for driver or passenger door on I12 i8 Coupe and I15 i8 Spyder (2015-2021). Fits left or right. Sold individually. Supersedes obsolete BMW part number 51217404764 (51-21-7-404-764). Front right spring strut. Door, suspension, shocks. Bmw i8. Genuine Bmw Part - 31316786024 (31-31-6-786-024, 31316782858). Ships from BMW Northwest, Tacoma WA. If your door struts are weak, and your door doesn't open all the way up on your BMW i8, you can use these instructions in order to replace the door struts. All you need is a set of pliars to remove the metal pin locks, a replacement set of door struts and someone (or something) to hold the door up.