{"product_id":"speed-sensor-q21-6004-fit-for-peterbilt-kenworth-freightliner-volvo-tachometer","title":"Speed Sensor Q21-6004 Fit for Peterbilt Kenworth Freightliner Volvo Tachometer","description":"\u003ch2\u003eSpeed Sensor Q21-6004 for Peterbilt Kenworth Freightliner Volvo\u003c\/h2\u003e\u003cp\u003eThis speed sensor Q21-6004 provides accurate tachometer and speedometer signal output for select heavy-duty trucks for Peterbilt Kenworth Freightliner and Volvo. It delivers dependable vehicle speed data transmission to the ECM and gauge cluster for precise readouts.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis speed sensor Q21-6004 is an electronic component designed to measure rotational speed and send the signal to the tachometer or speedometer. It serves as a direct replacement for the original sensor on many Class 8 trucks. This Q21-6004 speed sensor is built to maintain accurate readings in demanding fleet operations.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eDirect fit replacement for the OEM Q21-6004 sensor\u003c\/li\u003e\n\u003cli\u003ePrecision-engineered sensing tip for reliable signal generation\u003c\/li\u003e\n\u003cli\u003eRobust housing resists vibration and thermal stress\u003c\/li\u003e\n\u003cli\u003eSealed electrical connector protects against moisture and debris\u003c\/li\u003e\n\u003cli\u003eCompatible with standard SAE J1939 or pulse output harnesses\u003c\/li\u003e\n\u003cli\u003eFactory-tested for consistent output across temperature ranges\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Peterbilt\u003c\/li\u003e\n\u003cli\u003efor Kenworth\u003c\/li\u003e\n\u003cli\u003efor Freightliner\u003c\/li\u003e\n\u003cli\u003efor Volvo\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLong-haul highway operations requiring steady tachometer readings\u003c\/li\u003e\n\u003cli\u003eRegional delivery fleets using in-dash speedometers for accurate DOT logs\u003c\/li\u003e\n\u003cli\u003eService bays replacing worn or failed sensors during scheduled maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eQ21-6004\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSpeed Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePulse type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this work on older Peterbilt models? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is designed for many Peterbilt trucks using the same Q21-6004 sensor location, but verify your vehicle's sensor mounting and connector shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e How do I know if my speed sensor is failing? \u003cstrong\u003eA:\u003c\/strong\u003e Common symptoms include erratic speedometer needle, no speed reading, or the engine derating due to lost speed signal. Replacing this sensor restores normal operation.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Part Outfitters","offers":[{"title":"Default Title","offer_id":46611943358650,"sku":"ZZ3F04718","price":56.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0779\/2476\/1786\/files\/s-l1600_a3054774-d440-4d6b-a99e-2c4e25817e3f.jpg?v=1789012328","url":"https:\/\/partoutfitters.com\/products\/speed-sensor-q21-6004-fit-for-peterbilt-kenworth-freightliner-volvo-tachometer","provider":"Part Outfitters","version":"1.0","type":"link"}