{"product_id":"audi-vw-nox-sensor-4n0907807b","title":"NOx Sensor for Audi \/ Volkswagen | OEM 4N0907807B | Nitrogen Oxide Sensor","description":"\u003ch2 data-section-id=\"l0zaa4\" data-start=\"101\" data-end=\"113\" class=\"PDq2pG_selectionAnchorContainer\"\u003eFitment\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp data-start=\"114\" data-end=\"265\"\u003eBased on OE catalog cross-reference data, \u003cstrong data-start=\"156\" data-end=\"182\"\u003e4N0907807B \/ 4N0907807\u003c\/strong\u003e is used in Volkswagen Group \u003cstrong data-start=\"211\" data-end=\"264\"\u003eMLB Evo \/ D5 platform diesel SCR (AdBlue) systems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"267\" data-end=\"295\"\u003eCommon applications include:\u003c\/p\u003e\n\u003cul data-start=\"297\" data-end=\"579\"\u003e\n\u003cli data-section-id=\"196lmk2\" data-start=\"297\" data-end=\"356\"\u003eAudi A8 (4N platform) 3.0 TDI \/ 4.0 TDI diesel variants\u003c\/li\u003e\n\u003cli data-section-id=\"1mxl01k\" data-start=\"357\" data-end=\"414\"\u003eAudi Q7 (4M facelift \/ MLB Evo diesel configurations)\u003c\/li\u003e\n\u003cli data-section-id=\"1uurelo\" data-start=\"415\" data-end=\"477\"\u003eAudi Q8 (MLB Evo diesel variants depending on engine code)\u003c\/li\u003e\n\u003cli data-section-id=\"w5ilva\" data-start=\"478\" data-end=\"531\"\u003eVolkswagen Touareg (CR \/ MLB Evo diesel variants)\u003c\/li\u003e\n\u003cli data-section-id=\"1wro7pc\" data-start=\"532\" data-end=\"579\"\u003eSCR (AdBlue) exhaust aftertreatment systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"581\" data-end=\"644\"\u003eFitment is strictly based on OE number matching: \u003cstrong data-start=\"630\" data-end=\"644\"\u003e4N0907807B\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"646\" data-end=\"807\"\u003eOE cross-reference data shows this sensor family is widely used across Audi A8 (4N) and related MLB Evo diesel platforms. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"809\" data-end=\"812\"\u003e\n\u003ch2 data-section-id=\"1sn8sr4\" data-start=\"814\" data-end=\"840\"\u003eTechnical Description\u003c\/h2\u003e\n\u003cp data-start=\"841\" data-end=\"961\"\u003eThis NOx sensor measures nitrogen oxide (NOx) concentration in diesel exhaust gases and sends real-time data to the ECU.\u003c\/p\u003e\n\u003cp data-start=\"963\" data-end=\"1109\"\u003eIt is part of the SCR (Selective Catalytic Reduction) system and controls AdBlue dosing strategy to reduce emissions and ensure Euro 6 compliance.\u003c\/p\u003e\n\u003cp data-start=\"1111\" data-end=\"1275\"\u003eThe sensor is an integrated electronic module designed for high-temperature exhaust environments and continuous emissions monitoring in modern VAG diesel platforms.\u003c\/p\u003e\n\u003chr data-start=\"1277\" data-end=\"1280\"\u003e\n\u003ch2 data-section-id=\"14jk4wc\" data-start=\"1282\" data-end=\"1309\"\u003eSymptoms \/ Fault Codes\u003c\/h2\u003e\n\u003cp data-start=\"1310\" data-end=\"1345\"\u003eCommon symptoms of failure include:\u003c\/p\u003e\n\u003cul data-start=\"1347\" data-end=\"1517\"\u003e\n\u003cli data-section-id=\"1e8aa3i\" data-start=\"1347\" data-end=\"1369\"\u003eCheck engine light\u003c\/li\u003e\n\u003cli data-section-id=\"tb88yx\" data-start=\"1370\" data-end=\"1418\"\u003eP2200 \/ P229F fault codes (system dependent)\u003c\/li\u003e\n\u003cli data-section-id=\"9918q9\" data-start=\"1419\" data-end=\"1450\"\u003eSCR \/ AdBlue system warning\u003c\/li\u003e\n\u003cli data-section-id=\"1yecva8\" data-start=\"1451\" data-end=\"1493\"\u003eReduced engine performance (limp mode)\u003c\/li\u003e\n\u003cli data-section-id=\"12mwl3m\" data-start=\"1494\" data-end=\"1517\"\u003eIncreased emissions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1519\" data-end=\"1522\"\u003e\n\u003ch2 data-section-id=\"1exb13b\" data-start=\"1524\" data-end=\"1546\"\u003eOE \/ Part Numbers\u003c\/h2\u003e\n\u003cul data-start=\"1547\" data-end=\"1662\"\u003e\n\u003cli data-section-id=\"tydvy9\" data-start=\"1547\" data-end=\"1561\"\u003e4N0907807B\u003c\/li\u003e\n\u003cli data-section-id=\"sw0zxf\" data-start=\"1562\" data-end=\"1575\"\u003e4N0907807\u003c\/li\u003e\n\u003cli data-section-id=\"1aefwkq\" data-start=\"1576\" data-end=\"1662\"\u003eRelated OE family variants (4N0907807F \/ J \/ M depending on revision and position)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1664\" data-end=\"1667\"\u003e\n\u003ch2 data-section-id=\"x9bttf\" data-start=\"1669\" data-end=\"1677\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 data-section-id=\"qplmuk\" data-start=\"1679\" data-end=\"1714\"\u003eWhat does this NOx sensor do?\u003c\/h3\u003e\n\u003cp data-start=\"1715\" data-end=\"1818\"\u003eIt measures nitrogen oxide levels in diesel exhaust and sends data to the ECU for SCR emission control.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1q3hz4t\" data-start=\"1820\" data-end=\"1855\"\u003eWhich vehicles use this part?\u003c\/h3\u003e\n\u003cp data-start=\"1856\" data-end=\"2006\"\u003eIt is commonly used in Audi A8 (4N platform) and other MLB Evo diesel models such as Q7, Q8, and Volkswagen Touareg depending on engine configuration.\u003c\/p\u003e\n\u003ch3 data-section-id=\"153fw06\" data-start=\"2008\" data-end=\"2046\"\u003eIs this sensor vehicle-specific?\u003c\/h3\u003e\n\u003cp data-start=\"2047\" data-end=\"2224\"\u003eYes. It is strictly matched by OE number. Even small suffix differences (B \/ F \/ J \/ M variants) can indicate different ECU calibration or sensor position (upstream\/downstream).\u003c\/p\u003e\n\u003ch3 data-section-id=\"zz2n8o\" data-start=\"2226\" data-end=\"2272\"\u003eCan similar NOx sensors be used instead?\u003c\/h3\u003e\n\u003cp data-start=\"2273\" data-end=\"2370\"\u003eNot recommended. NOx sensors are ECU-calibrated components and must match exact OE specification.\u003c\/p\u003e","brand":"ASHENG","offers":[{"title":"Default Title","offer_id":51863387832452,"sku":"4N0907807B","price":245.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/8313\/1012\/files\/12_1028bebe-484b-42e2-9ddb-6ddee5ab4235.jpg?v=1778947094","url":"https:\/\/www.jslook.com\/products\/audi-vw-nox-sensor-4n0907807b","provider":"ASHENG","version":"1.0","type":"link"}