{"product_id":"o2-oxygen-sensor-upstream-downstream-for-subaru-legacy-outback-tribeca-2010-2014-3-6l","title":"O2 Oxygen Sensor Upstream Downstream for Subaru Legacy Outback Tribeca (2010-2014) 3.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream O2 Sensor Kit for 2010-2014 Subaru Legacy, Outback \u0026amp; Tribeca (BM\/BR\/WX)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 4-piece oxygen sensor kit monitors air-fuel ratios and catalyst efficiency on 2010-2014 Subaru Legacy, Outback, and Tribeca models with the \u003cstrong\u003eEZ36D 3.6L\u003c\/strong\u003e engine.\u003c\/p\u003e\u003ch3\u003eThe Stock Subaru Legacy, Outback \u0026amp; Tribeca Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eBM\/BR\u003c\/strong\u003e Legacy\/Outback and \u003cstrong\u003eWX\u003c\/strong\u003e Tribeca endure extreme thermal cycling along the \u003cstrong\u003eEZ36D 3.6L\u003c\/strong\u003e exhaust manifolds. Heat soak and carbon soot foul the platinum electrodes, while moisture condensation fractures the zirconia element. Burned-out internal heater circuits delay closed-loop operation during cold starts. Degraded feedback skews fuel trims and triggers \u003cstrong\u003eP0131\u003c\/strong\u003e, \u003cstrong\u003eP0151\u003c\/strong\u003e, or \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e fault codes.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of Failing OEM Oxygen Sensors\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Triggers fuel trim, heater, or catalyst codes including \u003cstrong\u003eP0131\u003c\/strong\u003e, \u003cstrong\u003eP0171\u003c\/strong\u003e, \u003cstrong\u003eP0420\u003c\/strong\u003e, and \u003cstrong\u003eP0430\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Hesitation:\u003c\/strong\u003e Sluggish closed-loop voltage switching causes erratic air-fuel mixtures and bogging under throttle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor MPG \u0026amp; Failed Emissions:\u003c\/strong\u003e Rich open-loop fueling fouls plugs and spikes tailpipe hydrocarbons.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Heated Zirconia Sensor Solution\u003c\/h3\u003e\u003cp\u003eThis matched 4-piece kit replaces both bank upstream AFR sensors and downstream catalyst monitors on your \u003cstrong\u003eEZ36D\u003c\/strong\u003e flat-six. Laser-welded stainless housings shield fast-acting internal heater cores and dual-layer zirconia elements from exhaust corrosion. Pre-terminated OEM connectors ensure clean electrical output and true plug-and-play installation into factory bungs without splicing. Replacing all four sensors simultaneously restores balanced bank-to-bank fuel control.\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;\"\u003e2010-2014 Subaru Legacy, Outback, Tribeca\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;\"\u003eEZ36D 3.6L \/ BM, BR, WX\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;\"\u003eHeated Upstream AFR \u0026amp; Downstream Zirconia\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\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;\"\u003e234-9047, 234-9092, 250-54074, 350-64071\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2010-2014 Subaru Legacy 3.6L\u003c\/li\u003e\n\u003cli\u003e2010-2014 Subaru Outback 3.6L\u003c\/li\u003e\n\u003cli\u003e2010-2014 Subaru Tribeca 3.6L\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the BM\/BR\/WX Legacy, Outback, and Tribeca?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Fits 2010-2014 Legacy, Outback, and Tribeca models with the \u003cstrong\u003eEZ36D 3.6L\u003c\/strong\u003e engine. \u003cstrong\u003eExcludes 2.5L 4-cylinder trims; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0420\/P0430 or heater circuit codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor-induced.\u003c\/strong\u003e New sensors fix sluggish switching and heater faults (\u003cstrong\u003eP0135\/P0155\u003c\/strong\u003e); persistent \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes indicate catalyst wear.\u003c\/p\u003e\u003ch4\u003eAre OEM-style connectors included for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e All sensors include direct-fit OEM connectors; apply anti-seize only to threads before torquing.\u003c\/p\u003e\u003ch3\u003eThe Subaru Precision Standard\u003c\/h3\u003e\u003cp\u003eReplacing all four sensors restores ECM fuel-trim accuracy and CEL-free operation on your \u003cstrong\u003eEZ36D\u003c\/strong\u003e. Built for thermal durability, this kit maintains emissions compliance and crisp throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68096714572024,"sku":"DS-E8T6AO3HY","price":205.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-subaru-legacy-outback-tribeca-2010-2014-3-6l-1.jpg?v=1794640771","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-subaru-legacy-outback-tribeca-2010-2014-3-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}