Bosch 0261231045 knock sensor

The Bosch 0261231045 is a precision knock sensor designed to detect engine knock and detonation in spark ignition engines. This OE-quality sensor monitors high-frequency engine vibrations characteristic of abnormal combustion, transmitting critical data to the engine control unit to optimize ignition timing and prevent engine damage.

Key Features:

• Piezoelectric measuring element detects structure-borne vibrations from 1-20 kHz
• Sensitivity at 5 kHz: 26 ± 8 mV/g for accurate knock detection
• Operating temperature range: -40°C to 130°C for reliable performance in extreme conditions
• Integrated EV1-style electrical connector for easy installation
• M8 mounting bolt/stud fitment for secure attachment to engine block
• Impedance greater than 1 MΩ ensures clean signal transmission
• Maximum vibration tolerance up to 800 m/s²

By detecting knock early, this sensor helps improve combustion efficiency, reduce fuel consumption up to 9%, and increase torque up to 5%. The robust design enables use with multiple fuel qualities while protecting critical engine components like the cylinder head and head gasket from damage caused by sustained knocking. Compatible with standalone ECUs and OEM engine management systems.