2020 BMW X3 X4 M40i Easiest Air Filter Replacement Install Tutorial B58 Engine fujijikou 4年前 2020 BMW X3 X4 M40i B58 G01 Easiest Air Filter Replacement Install Tutorial This may also apply to other B58 engine models. Tools Needed: E14 Inverted Torx 16MM Wrench T25 Torx Optional: Micro Fiber Towel