{"product_id":"o2-oxygen-sensor-upstream-downstream-for-buick-enclave-2012-2017-3-6l","title":"O2 Oxygen Sensor Upstream Downstream for Buick Enclave (2012-2017) 3.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Kit for 2012-2017 Buick Enclave (Lambda)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece direct-fit oxygen sensor kit monitors exhaust gas stoichiometry on the 2012-2017 Buick Enclave to restore closed-loop fuel trim accuracy and resolve emissions-related check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Buick Enclave Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eOver extended heat cycling and high mileage, factory zirconia sensors on the 3.6L \u003cstrong\u003eLLT\u003c\/strong\u003e direct-injection engine develop carbon fouling and internal ceramic element degradation. As heater circuits fail and sensor response times slow, the ECM defaults to sub-optimal open-loop fueling maps. This condition causes sluggish throttle response, elevated fuel consumption, tailpipe odor, and recurring diagnostic trouble codes such as P0135, P0155, P0420, and P0430 across the \u003cstrong\u003eLambda\u003c\/strong\u003e platform.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to match factory switching profiles, this matched upstream and downstream set utilizes high-density ceramic sensing elements with fast-acting internal heaters. Precision laser-welded stainless steel bodies resist thermal shock and road-grime intrusion. Each sensor features direct-plug harness connectors and high-temperature lead sleeving to directly replace OEM numbers \u003cstrong\u003e12640453\u003c\/strong\u003e, \u003cstrong\u003e12590035\u003c\/strong\u003e, and \u003cstrong\u003e234-4566\u003c\/strong\u003e without wire cutting, soldering, or pin repinning.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors (Bank 1 \u0026amp; Bank 2 Sensor 1)\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors (Bank 1 \u0026amp; Bank 2 Sensor 2)\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;\"\u003e2012-2017 Buick Enclave\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;\"\u003e3.6L LLT V6 \/ GM Lambda\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;\"\u003e288 hp \/ 270 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;\"\u003eS4-4565, 234-4566, 12590035, 12597449, 12616203, 12634064, 2344818, 12596688, 12634085, 12640453, 1821378J10, 2344259, 2344840\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\u003e2012 Buick Enclave 3.6L V6\u003c\/li\u003e\n  \u003cli\u003e2013 Buick Enclave 3.6L V6\u003c\/li\u003e\n  \u003cli\u003e2014 Buick Enclave 3.6L V6\u003c\/li\u003e\n  \u003cli\u003e2015 Buick Enclave 3.6L V6\u003c\/li\u003e\n  \u003cli\u003e2016 Buick Enclave 3.6L V6\u003c\/li\u003e\n  \u003cli\u003e2017 Buick Enclave 3.6L V6\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 Lambda Enclave?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2012-2017 Buick Enclave equipped with the 3.6L \u003cstrong\u003eLLT\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire splicing or universal connectors?\u003c\/h4\u003e\n\u003cp\u003eNo, these sensors feature factory-style direct-fit connectors for plug-and-play installation without wire splicing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Buick Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eFull-size Buick crossover platforms demand precise closed-loop fueling management to preserve catalytic converter core integrity and sustain factory efficiency over heavy daily commuting.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551492309240,"sku":"DS-EVV69JEG7","price":89.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-buick-enclave-2012-2017-3-6l-1.jpg?v=1790797364","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-buick-enclave-2012-2017-3-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}