The CTA BMW Crankshaft Front and Rear Seal Removal and Installer Kit, No. 7643, removes and installs front and rear crankshafts on chassis models N40, N42, N45T, N46T, N52, N52K, N53, N54 and N55. This kit comes in an durable and easy to stow case for storage. This set is comparable to BMW Factor tools Nos. 11920, 119230, 119235 and 110370, the company says.