Diamond S-604-01A Crankshaft Position Sensor for Subaru

The Diamond S-604-01A is a direct replacement crankshaft position sensor designed for Subaru vehicles including Forester, Impreza, and Legacy models. This critical engine management component monitors the position and rotational speed of the crankshaft, sending vital timing information to the engine control module (ECM) to ensure proper fuel injection and ignition timing.

Key Features:

• Direct replacement for OEM crankshaft position sensor
• Monitors crankshaft position and rotational speed for precise engine timing
• Located at the front of the engine block, below the alternator and above the timing belt cover
• Essential for proper engine starting and smooth operation
• Helps prevent no-start conditions and intermittent stalling issues

A faulty crankshaft position sensor can cause your engine to crank without starting, result in poor performance, or cause intermittent stalling. This sensor works in conjunction with the camshaft position sensor to ensure the ECM maintains proper synchronization of engine timing events. Regular replacement of a failing CKP sensor helps maintain reliable engine operation and prevents potential check engine light codes.