{"product_id":"o2-oxygen-sensor-upstream-downstream-for-bmw-x4-2015-2016-2-0l","title":"O2 Oxygen Sensor Upstream Downstream for BMW X4 (2015-2016) 2.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Kit for 2015-2016 BMW X4 (F26)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Upstream and Downstream Oxygen Sensor Kit monitors exhaust gas stoichiometry and catalytic efficiency on the 2015-2016 BMW X4 to restore closed-loop fuel control and correct air-fuel mixture ratios.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock BMW X4 Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory lambda sensors on the \u003cstrong\u003eBMW F26\u003c\/strong\u003e platform endure intense thermal cycling, exhaust soot contamination, and silicone poisoning over time. In the turbocharged \u003cstrong\u003eN20B20\u003c\/strong\u003e direct-injection environment, aged zirconium dioxide sensing elements experience response lag and voltage drift. This deterioration prevents the engine control module (DME) from calculating precise short-term fuel trims (STFT), triggering check engine lights (CEL codes P0130 through P0141), rough idle stability issues, elevated fuel consumption, and catalytic converter poisoning.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis matched upstream and downstream oxygen sensor set is engineered to match factory response profiles. Built with heat-treated stainless steel housings, integrated ceramic heating elements, and high-temp cross-linked wire shielding, these sensors maintain accurate signal transmission in harsh exhaust environments. The wideband upstream sensor delivers continuous lambda regulation, while the planar downstream unit provides precise post-cat monitoring to preserve closed-loop fuel mapping and clear persistent sensor-related DME fault codes.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Upstream Oxygen Sensor\u003c\/li\u003e\n  \u003cli\u003e1x Downstream Oxygen Sensor\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2015-2016 BMW X4\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN20 \/ F26\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e240 hp \/ 260 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e0258010418\u003c\/strong\u003e, \u003cstrong\u003e0258010419\u003c\/strong\u003e, \u003cstrong\u003e0258027029\u003c\/strong\u003e, \u003cstrong\u003e11787589121\u003c\/strong\u003e, \u003cstrong\u003e11787589122\u003c\/strong\u003e, \u003cstrong\u003e234-4562\u003c\/strong\u003e, \u003cstrong\u003e234-5054\u003c\/strong\u003e, \u003cstrong\u003e758912102\u003c\/strong\u003e, \u003cstrong\u003e758912202\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW X4 2015-2016 2.0L (F26)\u003c\/li\u003e\n  \u003cli\u003eBMW 228i\u003c\/li\u003e\n  \u003cli\u003eBMW 320i\u003c\/li\u003e\n  \u003cli\u003eBMW X1\u003c\/li\u003e\n  \u003cli\u003eBMW X3\u003c\/li\u003e\n  \u003cli\u003eBMW X5\u003c\/li\u003e\n  \u003cli\u003eBMW Z4\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the F26 X4?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2015-2016 BMW X4 equipped with the \u003cstrong\u003eN20\u003c\/strong\u003e 2.0L inline-4 engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire splicing or repinning?\u003c\/h4\u003e\n\u003cp\u003eNo, these are direct-fit OE-style replacements supplied with pre-crimped factory-style connectors for a true plug-and-play installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe BMW Precision Standard\u003c\/h3\u003e\n\u003cp\u003ePreserve factory drivability and eliminate CEL errors with lambda control components engineered specifically for strict European emissions standards and direct-injected fuel management.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551304057080,"sku":"DS-EL15EXF9F","price":68.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-bmw-x4-2015-2016-2-0l-1.jpg?v=1790794762","url":"https:\/\/performancechiptuning.com\/de\/products\/o2-oxygen-sensor-upstream-downstream-for-bmw-x4-2015-2016-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}