{"product_id":"o2-oxygen-sensor-upstream-downstream-for-nissan-frontier-2008-2010-4-0l","title":"O2 Oxygen Sensor Upstream Downstream for Nissan Frontier (2008-2010) 4.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream Oxygen Sensor Kit for 2008-2010 Nissan Frontier (D40)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 4-piece oxygen sensor kit monitors pre- and post-catalyst exhaust oxygen levels on the 2008-2010 Nissan Frontier (\u003cstrong\u003eD40\u003c\/strong\u003e) \u003cstrong\u003eVQ40DE 4.0L V6\u003c\/strong\u003e to regulate air-fuel trim and catalyst efficiency.\u003c\/p\u003e\u003ch3\u003eThe Stock Nissan Frontier Oxygen Sensor Failure\u003c\/h3\u003e\u003cp\u003eOver extended mileage and severe thermal cycling, factory \u003cstrong\u003eD40\u003c\/strong\u003e oxygen sensors on the \u003cstrong\u003eVQ40DE 4.0L V6\u003c\/strong\u003e suffer silicone contamination, carbon fouling, and internal heater circuit burnout. Upstream wideband air-fuel sensors develop sluggish lambda response, skewing closed-loop fuel trims under load. Simultaneously, downstream heated zirconia elements experience ceramic micro-fractures from exhaust condensation and vibration, triggering persistent ECU fault codes including \u003cstrong\u003eP2A00\u003c\/strong\u003e, \u003cstrong\u003eP2A03\u003c\/strong\u003e, \u003cstrong\u003eP0138\u003c\/strong\u003e, and \u003cstrong\u003eP0158\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Oxygen Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Active \u003cstrong\u003eP2A00\u003c\/strong\u003e, \u003cstrong\u003eP2A03\u003c\/strong\u003e, \u003cstrong\u003eP0138\u003c\/strong\u003e, \u003cstrong\u003eP0158\u003c\/strong\u003e, or \u003cstrong\u003eP0420\u003c\/strong\u003e\/\u003cstrong\u003eP0430\u003c\/strong\u003e codes from sluggish voltage switching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRich Exhaust \/ Fuel Loss:\u003c\/strong\u003e Unburned fuel odor, tailpipe soot, and reduced MPG from skewed lambda feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivability \u0026amp; Emissions Failure:\u003c\/strong\u003e Rough idle, throttle hesitation, or incomplete readiness monitors failing emissions testing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit 4-Sensor Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing all four sensors as a matched set restores balanced Bank 1 and Bank 2 closed-loop fuel control across the \u003cstrong\u003eVQ40DE 4.0L V6\u003c\/strong\u003e. Each unit features a laser-welded \u003cstrong\u003e310S stainless steel\u003c\/strong\u003e protective shield, \u003cstrong\u003ePTFE\u003c\/strong\u003e breather membrane, and precision \u003cstrong\u003ezirconia ceramic\u003c\/strong\u003e sensing element for rapid light-off and accurate voltage switching. Factory-length harnesses and OEM-style weatherproof connectors ensure plug-and-play installation without cutting or splicing.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 Upstream Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003e2 Downstream Oxygen Sensors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\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;\"\u003e2008-2010 Nissan Frontier\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;\"\u003eVQ40DE 4.0L V6 \/ D40\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;\"\u003eEmissions \u0026amp; Substrate\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit Zirconia Ceramic Element \/ Stainless Housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eInstallation Type\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect Bolt-On OEM Replacement (No Cutting or Welding)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2008 Nissan Frontier (4.0L V6)\u003c\/li\u003e\n\u003cli\u003e2009 Nissan Frontier (4.0L V6)\u003c\/li\u003e\n\u003cli\u003e2010 Nissan Frontier (4.0L V6)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the D40 Frontier?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This fits 2008-2010 Nissan Frontier trucks equipped with the \u003cstrong\u003eVQ40DE 4.0L V6\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 2.5L I4 trims; confirm engine displacement before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P2A00, P0138, or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when sensor degradation is the cause.\u003c\/strong\u003e Matched upstream (\u003cstrong\u003eP2A00\u003c\/strong\u003e\/\u003cstrong\u003eP2A03\u003c\/strong\u003e) and downstream (\u003cstrong\u003eP0138\u003c\/strong\u003e\/\u003cstrong\u003eP0158\u003c\/strong\u003e) units restore ECU feedback, though damaged catalysts triggering \u003cstrong\u003eP0420\u003c\/strong\u003e\/\u003cstrong\u003eP0430\u003c\/strong\u003e require separate inspection.\u003c\/p\u003e\u003ch4\u003eAre OEM-style connectors included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Pre-terminated harnesses plug directly into factory sockets; install using a 22mm oxygen sensor socket and torque to factory specifications.\u003c\/p\u003e\u003ch3\u003eThe Nissan Heavy-Duty Standard\u003c\/h3\u003e\u003cp\u003eBuilt for towing loads and severe exhaust heat soak, this matched 4-sensor kit keeps your \u003cstrong\u003eD40\u003c\/strong\u003e Frontier running at stoichiometric efficiency. Accurate lambda feedback protects catalytic converter longevity and maintains dependable V6 throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119397400824,"sku":"DS-EB5W3UKVE","price":97.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-nissan-frontier-2008-2010-4-0l-1.jpg?v=1794720096","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-nissan-frontier-2008-2010-4-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}