MINI 2014 -2023 Mk3 (F55/F56/F57) Battery lead negative IBS. MINI 2006 -2015 Mk2 (R55/R56/R57) Battery lead negative IBS. MINI (BMW) MINI Petrol 24796 Miles. Engines This warranty is limited to defects of the engine block, heads, valves, rockers, lifters, pistons, crank and cam shafts and other internal lubricated parts.