{"product_id":"o2-oxygen-sensor-upstream-downstream-for-nissan-sentra-2003-2006-1-8l","title":"O2 Oxygen Sensor Upstream Downstream for Nissan Sentra (2003-2006) 1.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Sensor Kit for 2003-2006 Nissan Sentra (B15)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This upstream and downstream oxygen sensor kit monitors exhaust oxygen on the 2003-2006 Nissan Sentra \u003cstrong\u003eB15\u003c\/strong\u003e \u003cstrong\u003e1.8L QG18DE\u003c\/strong\u003e to regulate fuel trim and catalyst efficiency.\u003c\/p\u003e\u003ch3\u003eThe Stock Nissan Sentra O2 Sensor Failure\u003c\/h3\u003e\u003cp\u003eOver high-mileage thermal cycles, factory sensing elements and heater circuits on the \u003cstrong\u003eB15\u003c\/strong\u003e Sentra \u003cstrong\u003eQG18DE 1.8L\u003c\/strong\u003e fail from carbon fouling, oil ash, and thermal shock. When the upstream sensor slows or opens, the ECM enters rich open-loop fueling and sets codes like \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, or \u003cstrong\u003eP1273\u003c\/strong\u003e. Simultaneously, a fatigued downstream sensor fails to track catalyst oxygen storage, triggering \u003cstrong\u003eP0136\u003c\/strong\u003e or \u003cstrong\u003eP0420\u003c\/strong\u003e.\u003c\/p\u003e\u003ch4\u003eCommon Symptoms of a Failing OEM Oxygen Sensor\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFault Codes \u0026amp; CEL:\u003c\/strong\u003e Stored \u003cstrong\u003eP0130\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, or \u003cstrong\u003eP0420\u003c\/strong\u003e DTCs from slow switching or heater failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRich Fueling:\u003c\/strong\u003e Sluggish upstream feedback causes heavy fuel consumption, black soot, and fouled plugs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrivability \u0026amp; Emissions:\u003c\/strong\u003e Unstable closed-loop control causes rough idle, hesitation, and failed tailpipe testing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eEngineered to match OEM specs for \u003cstrong\u003e22693-CD700\u003c\/strong\u003e and \u003cstrong\u003e22693-8U300\u003c\/strong\u003e, this matched pair restores rapid closed-loop feedback across exhaust manifold and post-catalyst bungs. Each sensor uses a laser-welded stainless housing, PTFE breather filter, and zirconia ceramic element built to withstand exhaust moisture and heat. Factory connectors plug straight into the \u003cstrong\u003eQG18DE\u003c\/strong\u003e harness without splicing. Replacing \u003cstrong\u003e234-5061\u003c\/strong\u003e and \u003cstrong\u003e234-4835\u003c\/strong\u003e together ensures balanced voltage signaling.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 Upstream Oxygen Sensor (\u003cstrong\u003e234-5061\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e1 Downstream Oxygen Sensor (\u003cstrong\u003e234-4835\u003c\/strong\u003e)\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;\"\u003e2003-2006 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;\"\u003eQG18DE 1.8L \/ B15\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 Configuration\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit Upstream (234-5061) \u0026amp; Downstream (234-4835) Heated Planar\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 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;\"\u003e234-5061, 234-4835, 22693-CD700, 22693-8U300, 5S5677, OS2349, SG1516, 250-25005, 0258007240, 0258007241\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2003-2006 Nissan Sentra 1.8L\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the B15 Sentra?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for the 2003-2006 Nissan Sentra \u003cstrong\u003eQG18DE 1.8L\u003c\/strong\u003e. \u003cstrong\u003eExcludes 2.5L QR25DE (SE-R \/ Spec V) models; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0130, P0135, or P0420 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor-related.\u003c\/strong\u003e New \u003cstrong\u003e234-5061\u003c\/strong\u003e and \u003cstrong\u003e234-4835\u003c\/strong\u003e sensors resolve heater and slow-response codes after clearing DTCs, though persistent \u003cstrong\u003eP0420\u003c\/strong\u003e may indicate a worn catalyst.\u003c\/p\u003e\u003ch4\u003eAre factory connectors pre-installed for plug-and-play fitment?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Both sensors feature OEM-style plugs; apply anti-seize sparingly to threads only and torque to spec.\u003c\/p\u003e\u003ch3\u003eThe Nissan Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt for reliable fuel metering on daily-driven \u003cstrong\u003eB15\u003c\/strong\u003e platforms, this matched sensor kit restores factory economy and emissions compliance. Accurate voltage switching keeps your \u003cstrong\u003eQG18DE\u003c\/strong\u003e running clean and CEL-free.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68094255563000,"sku":"DS-EYPVZGHCI","price":46.95,"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-2003-2006-1-8l-1.jpg?v=1794618683","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-nissan-sentra-2003-2006-1-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}