Specifications: OE number: 10456603, 12575869, 12589867, 12597415??213-3521 Fitment type: direct replacement Features: *Function: The engine needs to ignite for the best performance and power. If the ignition time is too late or early, it may lead to engine vibration. The knock sensor detects this vibration and converts the results into an electronic signal transmitted to the ECU for correction of the ignition timing. *OEM product with premium quality *According to the original factory specifications. *Perfect match for the original car. *Easy installation. *Stable performance, high reliability. Fit for: ENGINES: 4.8L / 5.3L / 5.7L / 6.0L / 8.1L .