For BMW N40, N42, N45, N45T, N46, N46T, N52, N53, N54 Engines. Crankshaft Front Oil Seal Disassembly Tool Kit for BMW N40 42 45 46 52 53 54. Crankshaft front oil seal disassembler INSTALLATION KIT· Special designed to install and remove the front oil seal of crankshaft.