{"product_id":"nox-sensor-audi-vw-03l907807ad-5wk96688a-passat-a4-a5-scr-unit","title":"NOx Nitrogen Oxygen Sensor for Audi A4 \/ A5 \/ S4 \/ S5 \/ VW Passat \/ Sharan 03L907807AD \/ 5WK9 6688A SCR Emission System Unit","description":"\u003cp data-start=\"153\" data-end=\"348\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"153\" data-end=\"164\"\u003eFITMENT\u003c\/strong\u003e\u003cbr data-start=\"164\" data-end=\"167\"\u003eCompatible with Volkswagen Group diesel vehicles equipped with SCR (Selective Catalytic Reduction) AdBlue emission systems requiring NOx monitoring.\u003cbr data-start=\"315\" data-end=\"318\"\u003eCommon applications include:\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-start=\"349\" data-end=\"646\"\u003e\n\u003cli data-section-id=\"10kj6fi\" data-start=\"349\" data-end=\"410\"\u003eAudi A4 (B8 \/ B9 diesel SCR variants depending on engine)\u003c\/li\u003e\n\u003cli data-section-id=\"1kyvej4\" data-start=\"411\" data-end=\"444\"\u003eAudi A5 (diesel SCR variants)\u003c\/li\u003e\n\u003cli data-section-id=\"1b6daj0\" data-start=\"445\" data-end=\"507\"\u003eAudi S4 \/ S5 (select diesel SCR applications where fitted)\u003c\/li\u003e\n\u003cli data-section-id=\"1yim188\" data-start=\"508\" data-end=\"551\"\u003eVW Passat (B7 \/ B8 diesel SCR variants)\u003c\/li\u003e\n\u003cli data-section-id=\"cf53f7\" data-start=\"552\" data-end=\"593\"\u003eVW Sharan (diesel SCR variants 2010+)\u003c\/li\u003e\n\u003cli data-section-id=\"1359l7d\" data-start=\"594\" data-end=\"646\"\u003eRelated VW Group 2.0 TDI \/ 3.0 TDI SCR platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"648\" data-end=\"674\"\u003eUsing reference numbers:\u003c\/p\u003e\n\u003cul data-start=\"675\" data-end=\"840\"\u003e\n\u003cli data-section-id=\"1dgcig1\" data-start=\"675\" data-end=\"712\"\u003e03L907807AD (OEM VAG part number)\u003c\/li\u003e\n\u003cli data-section-id=\"1e1uezr\" data-start=\"713\" data-end=\"768\"\u003e5WK9 6688A (Continental\/VDO sensor cross-reference)\u003c\/li\u003e\n\u003cli data-section-id=\"2j9oqe\" data-start=\"769\" data-end=\"840\"\u003eCommon SCR NOx sensor family used across Audi\/VW\/Seat\/Skoda systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"842\" data-end=\"1001\"\u003eThis sensor is part of the SCR exhaust aftertreatment system and monitors nitrogen oxide (NOx) levels to control AdBlue dosing and ensure emissions compliance.\u003c\/p\u003e\n\u003chr data-start=\"1003\" data-end=\"1006\"\u003e\n\u003cp data-start=\"1008\" data-end=\"1204\"\u003e\u003cstrong data-start=\"1008\" data-end=\"1015\"\u003eFAQ\u003c\/strong\u003e\u003cbr data-start=\"1015\" data-end=\"1018\"\u003eQ1: What is the function of this NOx sensor?\u003cbr data-start=\"1062\" data-end=\"1065\"\u003eA1: It measures nitrogen oxide (NOx) in the exhaust and sends real-time data to the ECU to control AdBlue injection and reduce emissions.\u003c\/p\u003e\n\u003cp data-start=\"1206\" data-end=\"1369\"\u003eQ2: Where is it installed?\u003cbr data-start=\"1232\" data-end=\"1235\"\u003eA2: It is installed in the SCR exhaust system, typically before or after the catalytic converter depending on vehicle configuration.\u003c\/p\u003e\n\u003cp data-start=\"1371\" data-end=\"1524\"\u003eQ3: What are symptoms of failure?\u003cbr data-start=\"1404\" data-end=\"1407\"\u003eA3: Check engine light, SCR\/AdBlue warnings, NOx sensor fault codes, reduced engine power, or limp mode activation.\u003c\/p\u003e\n\u003cp data-start=\"1526\" data-end=\"1768\"\u003eQ4: Are 03L907807AD and 5WK9 6688A interchangeable?\u003cbr data-start=\"1577\" data-end=\"1580\"\u003eA4: Yes, 03L907807AD is the OEM VAG reference and 5WK9 6688A is the supplier cross-reference for the same NOx sensor unit, but correct fitment depends on engine code and ECU calibration.\u003c\/p\u003e","brand":"ASHENG","offers":[{"title":"Default Title","offer_id":51652455202948,"sku":"5WK9 6688A \/ 03L9 07807  AD","price":226.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/8313\/1012\/files\/12_f148d4ac-93a8-4f25-958e-32350b2487bd.jpg?v=1773993599","url":"https:\/\/www.jslook.com\/products\/nox-sensor-audi-vw-03l907807ad-5wk96688a-passat-a4-a5-scr-unit","provider":"ASHENG","version":"1.0","type":"link"}