Bosch 0261231176 OE Quality Engine Knock Sensor

The Bosch 0261231176 is an OE-quality engine knock sensor (also known as a detonation sensor) engineered to detect and help prevent damaging engine knock. Bosch is the world's leading original equipment supplier of knock sensors, and this unit is built to the same specifications as the sensors installed by vehicle manufacturers at the factory.

The knock sensor mounts directly to the engine block and uses a piezoelectric measuring element to detect the high-frequency structure-borne vibrations characteristic of engine knock (detonation/pinging). When knocking is detected, the sensor transmits a signal to the ECU, which then adjusts ignition timing to eliminate the damaging condition and restore optimal combustion.

Key Features:

• OE-quality construction for optimum engine protection and long service life
• Helps improve combustion efficiency and reduce fuel consumption up to 9%
• Can increase engine torque output up to 5%
• Compatible with multiple fuel qualities and various anti-knock fuel properties
• Wide operating temperature range: -40°C to 130°C (-40°F to 266°F)
• Highly accurate and sensitive knock detection for superior engine protection

Cross-Reference Part Numbers: 55186669 (Fiat), 93399899 (Chevrolet / GMC / Opel), PW911134, 409043855000, 2413713 (Indian / Polaris)

A failed or failing knock sensor may trigger a Check Engine Light, cause engine hesitation or misfire, produce a burning exhaust smell, or allow audible engine knock to go undetected — potentially leading to serious engine damage. Replacing a worn sensor with a genuine Bosch unit restores proper engine management system function and helps protect engine longevity.