Wells 5S12485 Ignition Knock Detonation Sensor

The Wells 5S12485 is a direct-fit ignition knock (detonation) sensor designed to restore proper engine management function. Knock sensors monitor engine vibrations and alert the powertrain control module (PCM) when detonation — commonly known as engine knock or ping — is detected, allowing the ECM to retard ignition timing and protect the engine from damage.

Key Features:

• Direct OEM replacement for the original knock sensor
• Detects abnormal combustion (detonation/pre-ignition) and signals the ECM
• Helps prevent engine damage caused by sustained knock events
• Engineered to meet or exceed original equipment specifications
• Manufactured by Wells Vehicle Electronics, a trusted supplier of ignition and electronic engine management components

A failed knock sensor will typically trigger a Check Engine Light and may cause the ECM to default to conservative ignition timing, resulting in reduced power and fuel economy. Replacing the sensor with a quality unit like the Wells 5S12485 restores closed-loop knock control and optimal engine performance.