{"product_id":"o2-oxygen-sensor-upstream-downstream-for-infiniti-ex35-fx35-2011-2012-3-5l","title":"O2 Oxygen Sensor Upstream Downstream for Infiniti EX35 FX35 (2011-2012) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream and Downstream Oxygen Sensor Kit for 2011-2012 Infiniti EX35, FX35 (J50 \/ S51)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The oxygen sensor kit restores closed-loop AFR monitoring and catalytic efficiency tracking on 2011-2012 EX35 and FX35 models to correct rough idling, erratic fueling, and check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Infiniti EX35, FX35 Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eExhaust heat and chemical contamination degrade factory zirconium and air-fuel ratio sensors over time on the high-revving \u003cstrong\u003eVQ35HR\u003c\/strong\u003e platform. Over years of thermal cycling within the tight exhaust manifolds and post-cat bungs of the \u003cstrong\u003eJ50\u003c\/strong\u003e and \u003cstrong\u003eS51\u003c\/strong\u003e chassis, internal heating elements burn out and ceramic thimbles foul with carbon soot, phosphorus, and oil blow-by. This leads to slow switching response times, false lean or rich signals, poor closed-loop fuel trims, reduced fuel economy, and persistent diagnostic trouble codes like P0130, P0138, or P0420.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis four-piece replacement kit features dual upstream wideband air-fuel ratio sensors and dual downstream heated oxygen sensors calibrated to meet factory impedance and response curves. Constructed with laser-welded stainless steel bodies, corrosion-resistant dual protective filter covers, and integrated high-temperature pre-applied thread anti-seize, these sensors resist thermal shock and exhaust gas erosion. Factory-matched harness pigtails with OE-style locking connectors provide direct plug-and-play installation without wire splicing, matching OEM standards across \u003cstrong\u003e22693-1MR0A\u003c\/strong\u003e and \u003cstrong\u003e234-9135\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors (Air-Fuel Ratio Sensors)\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors (Heated Catalyst Monitors)\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: solid font-size: min-width:\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;\"\u003e2011-2012 Infiniti EX35, FX35\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;\"\u003e\n\u003cstrong\u003eVQ35HR\u003c\/strong\u003e \/ \u003cstrong\u003eJ50\u003c\/strong\u003e (EX35), \u003cstrong\u003eS51\u003c\/strong\u003e (FX35)\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;\"\u003e297-303 hp \/ 253-262 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\u003e19316342\u003c\/strong\u003e, \u003cstrong\u003e226931MR0A\u003c\/strong\u003e, \u003cstrong\u003e226933RC0A\u003c\/strong\u003e, \u003cstrong\u003e234-4380\u003c\/strong\u003e, \u003cstrong\u003e234-9135\u003c\/strong\u003e, \u003cstrong\u003e24781\u003c\/strong\u003e, \u003cstrong\u003e250-54102\u003c\/strong\u003e, \u003cstrong\u003e350-64083\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\u003e2011-2012 Infiniti EX35 Base \u0026amp; Journey 3.5L V6 (J50)\u003c\/li\u003e\n  \u003cli\u003e2011-2012 Infiniti FX35 Base 3.5L V6 (S51)\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 J50 and S51 EX35 and FX35?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2011-2012 Infiniti EX35 and FX35 equipped with the 3.5L \u003cstrong\u003eVQ35HR\u003c\/strong\u003e engine. It is not compatible with earlier DE engine variants or FX50 5.0L V8 applications.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire cutting or universal splice kits during installation?\u003c\/h4\u003e\n\u003cp\u003eNo, all four sensors feature OE-spec wire lengths and terminal pinouts for a direct bolt-in and plug-in replacement.\u003c\/p\u003e\n\n\u003ch3\u003eThe Infiniti Precision Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered for the tight air-fuel tolerances of high-output Japanese V6 powertrains, this four-sensor kit maintains target lambda values to preserve throttle response, optimize combustion, and prevent pre-catalytic converter damage.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551322800376,"sku":"DS-EK4TWL4LW","price":71.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-infiniti-ex35-fx35-2011-2012-3-5l-1.jpg?v=1790794975","url":"https:\/\/performancechiptuning.com\/de\/products\/o2-oxygen-sensor-upstream-downstream-for-infiniti-ex35-fx35-2011-2012-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}