Bosch 0261231118 Engine Knock Sensor

The Bosch 0261231118 is an Original Equipment (OE) quality engine knock sensor designed to detect and prevent harmful engine detonation. This precision sensor monitors engine vibrations using a piezoelectric measuring element, identifying the characteristic high-frequency sounds of knocking and transmitting critical data to the engine control unit (ECU) for immediate ignition timing adjustment.

How It Works:

Mounted directly on the engine crankcase, this knock sensor detects structure-borne vibrations caused when the air-fuel mixture ignites prematurely. When knocking is detected, the sensor sends a signal to the ECU, which adjusts ignition timing to prevent engine damage. This intelligent knock control system allows the engine to operate at optimal ignition timing for maximum power and efficiency while protecting critical components like the cylinder head gasket and cylinder head from damage caused by sustained detonation.

Key Features:

• Original Equipment quality construction built to Bosch OE specifications
• Piezoelectric measuring element for precise knock detection
• 3-terminal design for reliable signal transmission
• Enables use of multiple fuel grades with varying anti-knock properties
• Operates reliably even at extreme engine temperatures
• Helps reduce fuel consumption and increase engine torque
• Delivers precision operation and long service life
• Replaces OE number 99360614100

Symptoms of Failure:

A failing knock sensor may cause a Check Engine Light, engine misfire or hesitation, burning exhaust smell, reduced performance, and audible engine knocking. Replacing a faulty knock sensor restores proper engine management, optimizes fuel efficiency, and protects your engine from potentially catastrophic detonation damage.