{"product_id":"o2-oxygen-sensor-upstream-downstream-for-mazda-cx-7-2007-2012-2-3l-turbo","title":"O2 Oxygen Sensor Upstream Downstream for Mazda CX-7 (2007-2012) 2.3L Turbo","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Kit for 2007-2012 Mazda CX-7 (ER)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This matched upstream and downstream oxygen sensor kit measures pre- and post-catalyst exhaust oxygen on the 2007-2012 Mazda CX-7 (\u003cstrong\u003eER\u003c\/strong\u003e) \u003cstrong\u003eL3-VDT 2.3L Turbo\u003c\/strong\u003e to maintain accurate closed-loop fuel trims.\u003c\/p\u003e\u003ch3\u003eThe Stock Mazda CX-7 Oxygen Sensor Failure\u003c\/h3\u003e\u003cp\u003eOn the \u003cstrong\u003eER\u003c\/strong\u003e chassis powered by the \u003cstrong\u003eL3-VDT 2.3L DISI Turbo\u003c\/strong\u003e, factory oxygen sensors endure extreme exhaust gas temperatures and aggressive boost fueling cycles. Sustained heat soak fractures the internal zirconia ceramic element while soot and crankcase oil vapors foul the platinum electrodes. Internal heater circuits also suffer wire fatigue, delaying closed-loop switching and triggering \u003cstrong\u003eP0134\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, or \u003cstrong\u003eP0420\u003c\/strong\u003e fault codes.\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 \u0026amp; DTCs:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0134\u003c\/strong\u003e, or \u003cstrong\u003eP0135\u003c\/strong\u003e codes from degraded sensor or heater response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRich Running \u0026amp; Fuel Skew:\u003c\/strong\u003e Sluggish switching forces rich fuel maps, fouling plugs and lowering MPG.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissions \u0026amp; Catalyst Faults:\u003c\/strong\u003e Erratic downstream voltage causes false \u003cstrong\u003eP0420\u003c\/strong\u003e codes and failed emissions tests.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Heated Zirconia Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eThis matched upstream and downstream kit uses OE-calibrated planar zirconia elements engineered for rapid light-off and stable output under high-EGT turbo operation. Each sensor features a laser-welded stainless housing with a protective shield to resist thermal shock and exhaust soot fouling. Pre-terminated OEM weatherpack connectors, heat-sleeved harnesses, and anti-seize coated threads ensure direct plug-and-play installation matching \u003cstrong\u003e234-5012\u003c\/strong\u003e, \u003cstrong\u003e234-4044\u003c\/strong\u003e, and \u003cstrong\u003eL33L188G1E9U\u003c\/strong\u003e specs.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 Upstream Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003e1 Downstream Oxygen Sensor\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;\"\u003e2007-2012 Mazda CX-7\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\u003eL3-VDT 2.3L Turbo\u003c\/strong\u003e \/ \u003cstrong\u003eER\u003c\/strong\u003e\n\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;\"\u003eSensor Architecture\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit Heated Zirconia (Upstream \u0026amp; Downstream)\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 (Plug-and-Play, No Splicing)\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;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e234-5012\u003c\/strong\u003e, \u003cstrong\u003e234-4044\u003c\/strong\u003e, \u003cstrong\u003e234-4542\u003c\/strong\u003e, \u003cstrong\u003eL33L188G1E9U\u003c\/strong\u003e, \u003cstrong\u003eL3BT188G1\u003c\/strong\u003e, \u003cstrong\u003eFS1H18861A\u003c\/strong\u003e, \u003cstrong\u003eKLS618861\u003c\/strong\u003e, \u003cstrong\u003eKLS618861A\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2007-2012 Mazda CX-7 2.3L Turbo (\u003cstrong\u003eER\u003c\/strong\u003e \/ \u003cstrong\u003eL3-VDT\u003c\/strong\u003e)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the ER CX-7?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Fits 2007-2012 Mazda CX-7 (\u003cstrong\u003eER\u003c\/strong\u003e) with the \u003cstrong\u003eL3-VDT 2.3L Turbo\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 2010-2012 2.5L naturally aspirated models; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0134, P0135, or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensors are faulty.\u003c\/strong\u003e Replacing both units resolves \u003cstrong\u003eP0134\u003c\/strong\u003e\/\u003cstrong\u003eP0135\u003c\/strong\u003e heater faults and false \u003cstrong\u003eP0420\u003c\/strong\u003e triggers if the catalyst is intact.\u003c\/p\u003e\u003ch4\u003eAre splicing or special connectors needed?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e Direct-fit OEM plugs allow plug-and-play installation; keep anti-seize strictly on the threads, never the sensing tip.\u003c\/p\u003e\u003ch3\u003eThe Mazda Precision Standard\u003c\/h3\u003e\u003cp\u003eEngineered for accurate ECU fuel-trim feedback and CEL-free operation on the \u003cstrong\u003eL3-VDT 2.3L Turbo\u003c\/strong\u003e. Built for turbo exhaust heat, it restores emissions compliance and throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68107270947064,"sku":"DS-EN89L9OR0","price":81.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-mazda-cx-7-2007-2012-2-3l-turbo-1.jpg?v=1794681704","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-mazda-cx-7-2007-2012-2-3l-turbo","provider":"Performance Chip Tuning","version":"1.0","type":"link"}