Gas Ta nk Fuel Do or Cap For BM W 1 3 5 6 series F20 X1 X6 X3 X5 MINI F56 R56 R57. Tank cap tank cap retaining strap for BMW 1 series F20 E82 3 series E90 4 series F33 5 series F10 6 series F12. For BMW 1 series F20 125 i: 2010 / 11-.