This shop manual covers the proper disassembly, inspection, rework, assembly, and installation of the 454191-12 turbocharger (including the variable vane system) found on the BMW 530D & 730D diesel cars. Written by an industry professional, this book contains full-color photos, diagrams, torque specs, and best practices. Repairing your 454191-12 turbocharger is easy and cost effective-if you know how