{"product_id":"o2-oxygen-sensor-upstream-downstream-for-bmw-z4-2006-2015-3-0l","title":"O2 Oxygen Sensor Upstream Downstream for BMW Z4 (2006-2015) 3.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Replacement Set for 2006-2015 BMW Z4 (E85 \/ E86 \/ E89)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece upstream and downstream oxygen sensor kit replaces degraded factory lambda sensors on the 2006-2015 BMW Z4 3.0L to restore factory closed-loop fueling control and prevent diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock BMW Z4 Lambda Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOver heat cycles and extended mileage, OEM zirconia sensor elements suffer from thermal fatigue, silicone contamination, and soot accumulation. In the 3.0-liter \u003cstrong\u003eN52\u003c\/strong\u003e and \u003cstrong\u003eN54\u003c\/strong\u003e platforms, failing upstream wideband sensors exhibit sluggish switching response, causing the DME to miscalculate short-term fuel trims. This results in rough idle, decreased fuel efficiency, carbon build-up, and recurring lean\/rich check engine codes (such as P0171 or P0174), while degraded downstream sensors falsely trigger catalyst efficiency faults.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eConstructed with dual-layer 304 stainless steel shields and quick-activating planar ceramic cores, this matched 4-piece kit restores millivolt signal fidelity to factory parameters. Integrated ceramic heating elements reach operational light-off temperature in seconds to truncate open-loop cold starts. Factory-pinned, weatherproof harness connectors and heat-resistant PTFE wire shielding provide high-temp endurance within tight \u003cstrong\u003eE85\u003c\/strong\u003e, \u003cstrong\u003eE86\u003c\/strong\u003e, and \u003cstrong\u003eE89\u003c\/strong\u003e engine bay clearances, completely eliminating the need for wire cutting or splicing.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4x Direct-Fit Upstream and Downstream Oxygen Sensors\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;\"\u003e2006-2015 BMW Z4\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;\"\u003eN52, N54 3.0L \/ E85, E86, E89\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;\"\u003e215–335 hp \/ 185–332 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;\"\u003e234-4875, 234-4876, 234-4892, 234-5091, 234-5096, 234-5107, 234-5138, 234-5139, 2345091, 2344875, 2344876, 2344892, 2345096, 2345107, 2345138, 2345139\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\u003e2006-2008 BMW Z4 (E85 \/ E86) 3.0i, 3.0si 3.0L N52\u003c\/li\u003e\n  \u003cli\u003e2009-2011 BMW Z4 (E89) sDrive30i 3.0L N52\u003c\/li\u003e\n  \u003cli\u003e2009-2015 BMW Z4 (E89) sDrive35i, sDrive35is 3.0L N54\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 E85, E86, and E89 Z4?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2006-2015 BMW Z4 equipped with the 3.0L \u003cstrong\u003eN52\u003c\/strong\u003e or \u003cstrong\u003eN54\u003c\/strong\u003e inline-six engines. \u003cstrong\u003eConfirm your specific engine variant and harness connector orientation before ordering.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to reset ECU adaptations after installing these sensors?\u003c\/h4\u003e\n\u003cp\u003eWhile not strictly mandatory, clearing existing short- and long-term fuel trim adaptations via an OBD-II scan tool allows the DME to immediately calibrate against the fresh sensors.\u003c\/p\u003e\n\n\u003ch3\u003eThe BMW Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eHigh-strung Bavarian inline engines rely on rapid, uncompromised signal feedback to maintain proper combustion stoichiometry. Replacing sensors in matched four-corner sets guarantees uniform bank-to-bank signal response and persistent CEL-free operation under hard driving conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551472746744,"sku":"DS-EOOY42JHQ","price":79.95,"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-z4-2006-2015-3-0l-1.jpg?v=1790796830","url":"https:\/\/performancechiptuning.com\/es\/products\/o2-oxygen-sensor-upstream-downstream-for-bmw-z4-2006-2015-3-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}