{"product_id":"o2-oxygen-sensor-upstream-downstream-for-nissan-sentra-2013-2019-1-8l","title":"O2 Oxygen Sensor Upstream Downstream for Nissan Sentra (2013-2019) 1.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Kit for 2013-2019 Nissan Sentra (B17)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This upstream and downstream O2 sensor kit monitors exhaust air-fuel ratios and catalyst efficiency on the 2013-2019 Nissan Sentra (\u003cstrong\u003eB17\u003c\/strong\u003e) powered by the \u003cstrong\u003eMRA8DE 1.8L\u003c\/strong\u003e.\u003c\/p\u003e\u003ch3\u003eThe Stock Nissan Sentra O2 Sensor Failure\u003c\/h3\u003e\u003cp\u003eOver high mileage, factory oxygen sensors on the \u003cstrong\u003eB17\u003c\/strong\u003e chassis equipped with the \u003cstrong\u003eMRA8DE 1.8L\u003c\/strong\u003e suffer thermal fatigue, ash fouling, and internal heater burnout. Carbon deposits coat the zirconia sensing element, causing sluggish voltage switching and skewed ECM fuel trim corrections. Damaged ceramic elements or failed heating coils trigger persistent codes like \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0138\u003c\/strong\u003e, and \u003cstrong\u003eP0141\u003c\/strong\u003e while forcing rich open-loop fueling.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM O2 Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheck Engine Light:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0133\u003c\/strong\u003e (slow response), \u003cstrong\u003eP0138\u003c\/strong\u003e (high voltage), or \u003cstrong\u003eP0141\u003c\/strong\u003e (heater failure).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Hesitation:\u003c\/strong\u003e Skewed sensor voltage disrupts closed-loop fuel trims under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor MPG \u0026amp; Emissions Failure:\u003c\/strong\u003e Rich open-loop operation wastes fuel and fails smog tests.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eEngineered to replace OEM numbers \u003cstrong\u003e234-9135\u003c\/strong\u003e and \u003cstrong\u003e234-4904\u003c\/strong\u003e, this matched sensor pair restores factory ECM calibration without wire splicing. Double-laser-welded stainless steel housings seal against exhaust moisture and thermal shock, while fast-acting ceramic heaters ensure rapid closed-loop light-off. Factory-length leads and weatherproof plugs connect straight to the \u003cstrong\u003eMRA8DE\u003c\/strong\u003e harness for accurate upstream metering and downstream catalyst monitoring.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1x Upstream Oxygen Sensor\u003c\/li\u003e\n\u003cli\u003e1x 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;\"\u003e2013-2019 Nissan Sentra\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;\"\u003eMRA8DE 1.8L \/ B17\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;\"\u003eFederal Emissions (2-Sensor) \/ Zirconia Element\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;\"\u003e234-4904, 234-9135\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2013-2019 Nissan Sentra 1.8L Federal Emissions (2-Sensor Package; Excludes California Emissions)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the B17 Sentra?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for the 2013-2019 Nissan Sentra \u003cstrong\u003eMRA8DE 1.8L\u003c\/strong\u003e. \u003cstrong\u003eFits Federal emissions (2-sensor) models only; California emissions packages are excluded.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0133, P0138, or P0141 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when sensor-related.\u003c\/strong\u003e Replacing \u003cstrong\u003e234-9135\u003c\/strong\u003e and \u003cstrong\u003e234-4904\u003c\/strong\u003e restores proper feedback and heater resistance; check for exhaust leaks first.\u003c\/p\u003e\u003ch4\u003eIs wire splicing required for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e Both sensors include OEM-style plugs for direct plug-and-play installation using a standard O2 socket.\u003c\/p\u003e\u003ch3\u003eThe Nissan Precision Standard\u003c\/h3\u003e\u003cp\u003eRestoring accurate O2 feedback on the \u003cstrong\u003eB17\u003c\/strong\u003e Sentra keeps the \u003cstrong\u003eMRA8DE 1.8L\u003c\/strong\u003e fuel-efficient and CEL-free. Matched upstream and downstream replacement ensures reliable emissions compliance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68116174995704,"sku":"DS-EKDE6M00R","price":44.95,"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-sentra-2013-2019-1-8l-1.jpg?v=1794710981","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-nissan-sentra-2013-2019-1-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}