BK21-6C315-BA Engine System Crankshaft Position Sensor for Ford Transit V348 The BK21-6C315-BA Crankshaft Position Sensor is designed for the Ford Transit V348 with 2.2 diesel engine. It is an important component of the engine management system, used to detect crankshaft position and rotational speed and provide signal information to the engine control system. Accurate crankshaft position signals help the engine control system manage fuel injection and engine operation. This