The crankshaft impulse sender, also known as a crankshaft position sensor, plays a crucial role in your vehicle's engine management system. It detects the rotational speed and position of the crankshaft, sending this vital information to the engine control unit (ECU). This data is essential for the ECU to precisely control fuel injection timing and ignition timing, ensuring optimal engine performance, fuel efficiency, and emissions control. A malfunctioning sensor can lead to various drivability issues, including rough idling, stalling, or even a no-start condition. TOPRAN is a reputable brand known for producing reliable automotive components. This 623 104 impulse sender is manufactured to meet or exceed original equipment specifications, offering a dependable solution for replacing a faulty sensor.