Installation: No additional tools required; the sensor can be installed quickly and easily. Function: precision knock sensor designed to accurately detect engine knock and respond to abnormal combustion. Compatibility: Compatible with Lexus and Scion vehicles that use part numbers 8961506010 or 8961520090. Materials and durability: Vibration sensor constructed from durable materials to withstand engine conditions and ensure reliability. Performance: Provides reliable knock detection to protect the engine and support proper ignition timing adjustments. Use scenarios: Scenario 1: Replacing a worn or failed knock sensor on a Lexus or Scion that uses part numbers 8961506010 or 8961520090 to restore proper engine knock detection. Scenario 2: During routine maintenance on older or mileage vehicles to maintain engine protection against knock. Scenario 3: In demanding driving conditions where consistent knock sensing is important, such as frequent hard acceleration, towing, or hot weather driving, to sustain engine protection and performance.