Identifying a 24X Reluctor Wheel: 24X Reluctor wheels were primary used on 1997-2005, and some 2006's. Double check by looking at the Crankshaft Sensor. All 24x wheels are detected by a black crankshaft sensor, while 58x use a grey sensor. This sensor is located at the back of the block, near the oil pan, on the passenger side of the engine, just above the starter.