{"product_id":"ignition-knock-sensor-4","title":"Ignition Knock Sensor","description":"The ACDelco 213-3521 Ignition Knock Sensor is a GM Original Equipment (OE) direct replacement, designed to monitor engine vibrations caused by irregular air\/fuel combustion. Its primary function is to detect 'knock' or detonation, signaling the Engine Control Module (ECM) to adjust ignition timing and the air\/fuel mixture. This process is crucial for preventing potential engine damage from pre-ignition and ensuring optimal vehicle performance and fuel efficiency.\n\nCrafted to GM OE specifications, this sensor ensures high durability and reliable performance. It promotes efficient ignition timing adjustments and is compatible with a wide array of GM models, including Chevrolet, GMC, Cadillac, Buick, Hummer, and Isuzu. For those experiencing symptoms such as poor engine performance, unusual noises, or reduced fuel efficiency, replacing the knock sensor with this ACDelco unit can restore the vehicle's optimal functionality.\n\nThis ACDelco ignition knock sensor features a male, round connector with a single pin terminal. It does not include a wire harness and requires no programming upon installation. The threaded end has a diameter of 0.39 inches (9.9 mm).","brand":"ACDelco","offers":[{"title":"Default Title","offer_id":52686736654648,"sku":"213-3521","price":52.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660670935.jpg?v=1784876200","url":"https:\/\/store.motormia.co\/products\/ignition-knock-sensor-4","provider":"MOTORMIA","version":"1.0","type":"link"}