Wells 5S12739 Ignition Knock Detonation Sensor

The Wells 5S12739 Ignition Knock Detonation Sensor is a precision-engineered replacement component designed to detect and monitor engine knock or detonation. This sensor listens for specific harmonic frequencies associated with engine knock or ping and sends a voltage signal to the Engine Control Module (ECM) when abnormal combustion is detected.

Key Features:

• Designed and manufactured to meet or exceed OEM specifications for performance and durability
• Detects preignition and detonation to protect engine components from damage
• Enables ECM to calculate and adjust proper ignition spark timing and injection pulse width
• Prevents Check Engine Light (CEL), Service Engine Soon (SES), or Malfunction Indicator Lamp (MIL) illumination caused by faulty knock detection
• Direct replacement for proper fit and function

A malfunctioning knock sensor can allow engine knock to occur unchecked, potentially causing reduced fuel mileage, decreased performance under load, increased emissions, and internal engine damage from piston slap against cylinder walls. The Wells 5S12739 restores proper engine management system operation to prevent these issues.

OEM Cross-Reference: 30530-R1A-A01, SU14152, KS398, EKS898, A10289, DKS838, EKA1002, ESA90047