{"product_id":"kit-jauge-afr-sonde-lambda-large-bande-lsu-4-9","title":"AFR Gauge and Wideband LSU Lambda Sensor Kit 4.9","description":"\u003c!--v3.1--\u003e\n\u003ch2\u003eWideband AFR gauge kit — finally read your mixture in real time\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003eAFR gauge kit\u003c\/strong\u003e combines an \u003cstrong\u003eair\/fuel ratio\u003c\/strong\u003e display with a \u003cstrong\u003eLSU 4.9 wideband lambda sensor\u003c\/strong\u003e, part number \u003cstrong\u003e0258017025\u003c\/strong\u003e. On a modified, turbocharged, or simply reprogrammed engine, it is the instrument that tells you whether the mixture is rich or lean the moment you are flat out, instead of finding out after a failure.\u003c\/p\u003e\n\u003ch3\u003eWhy a wideband sensor instead of a stock sensor\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eReading range from 8 to 20 AFR\u003c\/strong\u003e: the stock sensor is only reliable around stoichiometry, the wideband reads the entire useful range.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eRed digital display\u003c\/strong\u003e: numbers readable in broad daylight, with a peripheral scale to track the trend at a glance.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBosch LSU 4.9 sensor\u003c\/strong\u003e: the market standard for wideband measurement, more stable over time than previous generations.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eComplete kit\u003c\/strong\u003e: gauge, sensor, two harnesses, \u003cstrong\u003ewelding ring\u003c\/strong\u003e and manual, nothing else to order.\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eTwo Mode and Sel buttons\u003c\/strong\u003e: display settings accessible without disassembly.\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhat is a wideband oxygen sensor used for\u003c\/h3\u003e\n\u003cp\u003eAn \u003cstrong\u003eoxygen sensor\u003c\/strong\u003e measures the amount of oxygen remaining in the exhaust gases and deduces the richness of the intake mixture. The stock sensor, known as a threshold sensor, is used by the ECU to maintain stoichiometry under partial load: it does not provide information on a clearly rich or lean mixture. A \u003cstrong\u003ewideband lambda sensor\u003c\/strong\u003e, on the contrary, covers the entire range, making it the basic tool for engine mapping, carburetor tuning, or wide-open throttle monitoring. The displayed \u003cstrong\u003eair\/fuel ratio\u003c\/strong\u003e allows you to validate a reprogramming job or detect an intake leak before it costs you dearly.\u003c\/p\u003e\n\u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cp\u003eType: \u003cstrong\u003ewideband AFR gauge\u003c\/strong\u003e with sensor. Model: X series \u003cstrong\u003e30-0300\u003c\/strong\u003e. Sensor: \u003cstrong\u003eLSU 4.9\u003c\/strong\u003e, part number \u003cstrong\u003e0258017025\u003c\/strong\u003e. Display: digital \u003cstrong\u003ered\u003c\/strong\u003e with a scale from \u003cstrong\u003e8 to 20\u003c\/strong\u003e. Power supply: vehicle \u003cstrong\u003e12 V\u003c\/strong\u003e circuit. Contents: 1 gauge, 1 wideband sensor, 2 harnesses, 1 welding ring, hardware and manual. Compatibility: universal on gasoline engines, to be checked according to the vehicle before installation.\u003c\/p\u003e\n\u003ch3\u003eInstallation: the three steps that matter\u003c\/h3\u003e\n\u003cp\u003eAllow \u003cstrong\u003e2 to 4 hours\u003c\/strong\u003e with the welding of the ring. First step, the sensor position: weld the ring on the exhaust line \u003cstrong\u003eafter the turbo\u003c\/strong\u003e or the manifold, orienting the sensor between 10 and 2 o'clock to prevent condensation from accumulating in it. Second step, the power supply: take a \u003cstrong\u003e+12 V after ignition\u003c\/strong\u003e and a clean ground on the chassis, never on a painted point. Third step, the routing of the harnesses: keep them away from hot parts and ignition harnesses to avoid interference. Let the sensor heat up for about twenty seconds before considering the reading valid. This installation affects the exhaust line and the electrical circuit: entrust it to a professional if you are not equipped.\u003c\/p\u003e\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a wideband sensor and a 4-wire sensor?\u003c\/strong\u003e\u003cbr\u003eA wideband has an additional pumping cell that allows it to measure richness across the entire range, and not just around 14.7.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the sensor replace the stock one?\u003c\/strong\u003e\u003cbr\u003eNo. It is added on a dedicated tap and leaves the stock sensor in place for the ECU.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere to weld the ring on the exhaust?\u003c\/strong\u003e\u003cbr\u003eDownstream of the turbo or manifold, on a straight section, orienting the sensor upwards to protect it from condensates.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the gauge need to be calibrated?\u003c\/strong\u003e\u003cbr\u003eOpen-air calibration is recommended at the first power-up, sensor out of the exhaust, according to the provided manual.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it compatible with a diesel?\u003c\/strong\u003e\u003cbr\u003eThe AFR measurement is designed for gasoline engines. On diesel, the reading does not have the same tuning meaning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eStop tuning your engine blindly: order your wideband AFR gauge kit.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eType:\u003c\/strong\u003e Wideband AFR gauge with lambda sensor\u003cbr\u003e\u003cstrong\u003eModel:\u003c\/strong\u003e X series 30-0300\u003cbr\u003e\u003cstrong\u003eSensor:\u003c\/strong\u003e LSU 4.9, ref. 0258017025\u003cbr\u003e\u003cstrong\u003eRange:\u003c\/strong\u003e 8 to 20 AFR\u003cbr\u003e\u003cstrong\u003eDisplay:\u003c\/strong\u003e Red digital\u003cbr\u003e\u003cstrong\u003ePower supply:\u003c\/strong\u003e 12 V\u003cbr\u003e\u003cstrong\u003eContents:\u003c\/strong\u003e Gauge, sensor, 2 harnesses, welding ring, manual\u003cbr\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Universal gasoline, to be checked according to the vehicle\u003cbr\u003e\u003cstrong\u003eCondition:\u003c\/strong\u003e 100% New\u003c\/p\u003e","brand":"becquet-voiture.com","offers":[{"title":"LSU 4.9 Probe and AFR Gauge","offer_id":52861499474207,"sku":"\u003cnone\u003e","price":273.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0741\/7911\/7343\/files\/S1f9872ec90b14ee7920ca86183c7be90M.webp?v=1788859453","url":"https:\/\/becquet-voiture.com\/en\/products\/kit-jauge-afr-sonde-lambda-large-bande-lsu-4-9","provider":"Becquet Voiture","version":"1.0","type":"link"}