Bosch 054-905-377 G Ignition Knock Sensor

The Bosch 054-905-377 G is an OE-quality ignition knock sensor designed to detect engine knock and optimize ignition timing for peak performance. This precision sensor monitors high-frequency engine vibrations caused by premature combustion (knocking) and transmits critical data to the engine control unit (ECU) to prevent engine damage and maximize fuel efficiency.

Key Features:

• OE-quality Bosch engineering ensures accurate knock detection and reliable performance
• Piezoelectric sensing element detects structure-borne vibrations characteristic of engine knock
• 3-pin connector with blue housing for positive identification
• 535mm (21-inch) integrated wiring harness included
• Mounts directly to the engine block for optimal vibration detection
• Engineered to withstand extreme temperatures and harsh engine environments
• Helps prevent damage to cylinder head gaskets and internal engine components

When the knock sensor detects abnormal combustion vibrations, it signals the ECU to adjust ignition timing, preventing sustained knocking that can cause serious engine damage. By allowing the engine management system to optimize ignition timing, this sensor helps reduce fuel consumption while increasing torque output. OEM part number 054 905 377 G cross-references to Bosch part number 0 261 231 036.