{"product_id":"audi-nox-sensor-4h0907807d-5wk96797a","title":"NOx Sensor for Audi A8 \/ Q7 4.2 TDI | OEM 4H0907807D 5WK96797A | Nitrogen Oxide Sensor","description":"\u003ch2 data-section-id=\"l0zaa4\" data-start=\"114\" data-end=\"126\" class=\"PDq2pG_selectionAnchorContainer\"\u003eFitment\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp data-start=\"127\" data-end=\"253\"\u003eCompatible with Audi diesel vehicles equipped with V6\/V8 TDI engines and SCR (Selective Catalytic Reduction) emission systems.\u003c\/p\u003e\n\u003cp data-start=\"255\" data-end=\"353\"\u003eCommon applications include Audi large-platform diesel models using this NOx sensor configuration:\u003c\/p\u003e\n\u003cul data-start=\"355\" data-end=\"532\"\u003e\n\u003cli data-section-id=\"1r65rn4\" data-start=\"355\" data-end=\"402\"\u003eAudi A8 (D4 \/ 4H chassis) 3.0 TDI \/ 4.2 TDI\u003c\/li\u003e\n\u003cli data-section-id=\"kivkrt\" data-start=\"403\" data-end=\"462\"\u003eAudi Q7 (4L platform variants depending on engine code)\u003c\/li\u003e\n\u003cli data-section-id=\"wiq8sn\" data-start=\"463\" data-end=\"532\"\u003eVolkswagen Group premium diesel platforms with SCR\/AdBlue systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"534\" data-end=\"644\"\u003eFitment depends strongly on engine code (e.g., CTBA \/ CTBD \/ similar VAG diesel variants) and ECU calibration.\u003c\/p\u003e\n\u003chr data-start=\"646\" data-end=\"649\"\u003e\n\u003ch2 data-section-id=\"1sn8sr4\" data-start=\"651\" data-end=\"677\"\u003eTechnical Description\u003c\/h2\u003e\n\u003cp data-start=\"678\" data-end=\"795\"\u003eThis NOx sensor is installed in the diesel exhaust system to measure nitrogen oxide (NOx) concentration in real time.\u003c\/p\u003e\n\u003cp data-start=\"797\" data-end=\"933\"\u003eIt communicates with the ECU to regulate SCR system dosing (AdBlue\/urea injection) and ensure compliance with diesel emission standards.\u003c\/p\u003e\n\u003cp data-start=\"935\" data-end=\"1100\"\u003eThe sensor assembly typically includes an integrated control module and is mounted in the exhaust stream before or after the SCR catalyst depending on configuration.\u003c\/p\u003e\n\u003chr data-start=\"1102\" data-end=\"1105\"\u003e\n\u003ch2 data-section-id=\"14jk4wc\" data-start=\"1107\" data-end=\"1134\"\u003eSymptoms \/ Fault Codes\u003c\/h2\u003e\n\u003cp data-start=\"1135\" data-end=\"1170\"\u003eCommon symptoms of failure include:\u003c\/p\u003e\n\u003cul data-start=\"1172\" data-end=\"1358\"\u003e\n\u003cli data-section-id=\"1e8aa3i\" data-start=\"1172\" data-end=\"1194\"\u003eCheck engine light\u003c\/li\u003e\n\u003cli data-section-id=\"tb88yx\" data-start=\"1195\" data-end=\"1243\"\u003eP2200 \/ P229F fault codes (system dependent)\u003c\/li\u003e\n\u003cli data-section-id=\"9918q9\" data-start=\"1244\" data-end=\"1275\"\u003eSCR \/ AdBlue system warning\u003c\/li\u003e\n\u003cli data-section-id=\"1hkc4t7\" data-start=\"1276\" data-end=\"1313\"\u003eReduced engine power or limp mode\u003c\/li\u003e\n\u003cli data-section-id=\"r5j5eu\" data-start=\"1314\" data-end=\"1358\"\u003eIncreased emissions and fuel consumption\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1360\" data-end=\"1363\"\u003e\n\u003ch2 data-section-id=\"1exb13b\" data-start=\"1365\" data-end=\"1387\"\u003eOE \/ Part Numbers\u003c\/h2\u003e\n\u003cul data-start=\"1388\" data-end=\"1521\"\u003e\n\u003cli data-section-id=\"ij2su9\" data-start=\"1388\" data-end=\"1402\"\u003e4H0907807D\u003c\/li\u003e\n\u003cli data-section-id=\"yxw5y7\" data-start=\"1403\" data-end=\"1440\"\u003e5WK96797A (Continental reference)\u003c\/li\u003e\n\u003cli data-section-id=\"10y5ftv\" data-start=\"1441\" data-end=\"1521\"\u003e8K0 \/ 4M \/ related platform cross-references may exist depending on revision\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1523\" data-end=\"1526\"\u003e\n\u003ch2 data-section-id=\"x9bttf\" data-start=\"1528\" data-end=\"1536\"\u003eFAQ\u003c\/h2\u003e\n\u003ch3 data-section-id=\"qplmuk\" data-start=\"1538\" data-end=\"1573\"\u003eWhat does this NOx sensor do?\u003c\/h3\u003e\n\u003cp data-start=\"1574\" data-end=\"1699\"\u003eIt measures nitrogen oxide levels in diesel exhaust gases and sends data to the ECU to control SCR emission system operation.\u003c\/p\u003e\n\u003ch3 data-section-id=\"13k5ovo\" data-start=\"1701\" data-end=\"1724\"\u003eWhere is it used?\u003c\/h3\u003e\n\u003cp data-start=\"1725\" data-end=\"1827\"\u003eIt is used in Audi large diesel platforms such as A8 and Q7 equipped with SCR\/AdBlue emission systems.\u003c\/p\u003e\n\u003ch3 data-section-id=\"qklcen\" data-start=\"1829\" data-end=\"1900\"\u003eAre 4H0907807D sensors interchangeable with similar part numbers?\u003c\/h3\u003e\n\u003cp data-start=\"1901\" data-end=\"2031\"\u003eNot always. Even if connectors and housings look similar, compatibility depends on ECU software calibration and exact OE matching.\u003c\/p\u003e\n\u003ch3 data-section-id=\"j97hsx\" data-start=\"2033\" data-end=\"2064\"\u003eWhat happens if it fails?\u003c\/h3\u003e\n\u003cp data-start=\"2065\" data-end=\"2176\"\u003eIt may trigger emission warnings, fault codes, and reduced engine performance depending on SCR system strategy.\u003c\/p\u003e","brand":"ASHENG","offers":[{"title":"Default Title","offer_id":51863385374852,"sku":"4H0907807D\/5WK96797A","price":218.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/8313\/1012\/files\/12_7d947454-5c48-43bd-a960-22a3e19760b5.jpg?v=1778947052","url":"https:\/\/www.jslook.com\/products\/audi-nox-sensor-4h0907807d-5wk96797a","provider":"ASHENG","version":"1.0","type":"link"}