{"product_id":"o2-oxygen-sensor-upstream-downstream-for-hyundai-elantra-2017-2019-2-0l","title":"O2 Oxygen Sensor Upstream Downstream for Hyundai Elantra (2017-2019) 2.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Sensor Kit for 2017-2019 Hyundai Elantra (AD)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This matched upstream and downstream O2 sensor kit monitors pre- and post-catalyst exhaust lambda on the 2017-2019 Hyundai Elantra \u003cstrong\u003eAD\u003c\/strong\u003e with the \u003cstrong\u003eNu 2.0L (G4NH)\u003c\/strong\u003e engine for accurate closed-loop fueling.\u003c\/p\u003e\u003ch3\u003eThe Stock Hyundai Elantra O2 Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eAD\u003c\/strong\u003e chassis with the \u003cstrong\u003eNu 2.0L (G4NH)\u003c\/strong\u003e engine endure severe exhaust heat cycling. Carbon fouling, coolant or oil contamination, and thermal shock degrade the zirconia element and burn out the internal heater circuit. As voltage switching slows, the ECU loses closed-loop lambda feedback and triggers fault codes including \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, or \u003cstrong\u003eP0171\u003c\/strong\u003e.\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 \/ DTCs:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0133\u003c\/strong\u003e (slow response), \u003cstrong\u003eP0135\u003c\/strong\u003e\/\u003cstrong\u003eP0141\u003c\/strong\u003e (heater circuit), or \u003cstrong\u003eP2096\u003c\/strong\u003e (lean post-cat trim).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Hesitation:\u003c\/strong\u003e Sluggish upstream switching destabilizes air-fuel ratios under light throttle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor Fuel Economy \u0026amp; Emissions Failure:\u003c\/strong\u003e Open-loop enrichment wastes fuel and fails OBD-II readiness checks.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Heated O2 Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing both sensors as a matched set restores synchronous air-fuel metering and catalyst monitoring on the \u003cstrong\u003eNu 2.0L (G4NH)\u003c\/strong\u003e exhaust system. Each direct-fit unit uses a stainless steel shell, heat-shielded harness, and OEM-style connector that plugs straight into the chassis loom with zero splicing. Fast-acting zirconia elements shorten warm-up time, stabilize fuel trims, and restore factory ECU calibration.\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;\"\u003e2017-2019 Hyundai Elantra\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;\"\u003eNu 2.0L (G4NH) \/ AD\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 Specification\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eDirect-Fit Heated Upstream \u0026amp; Downstream O2 Kit\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\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2017-2019 Hyundai Elantra 2.0L (1 Upstream, 1 Downstream)\u003c\/li\u003e\n\u003cli\u003eExcluded: 1.4L\/1.6L turbo engines; 2020 model year, Elantra GT, Veloster, and Kia Soul.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the AD Elantra?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for the 2017-2019 Hyundai Elantra \u003cstrong\u003eNu 2.0L (G4NH)\u003c\/strong\u003e. \u003cstrong\u003eExcludes 1.4L\/1.6L turbo, 2020 models, Elantra GT, Veloster, and Kia Soul.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135, P0141, or P2096 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor failure is the root cause.\u003c\/strong\u003e Replaces worn heaters and elements triggering \u003cstrong\u003eP0133\u003c\/strong\u003e, \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0141\u003c\/strong\u003e, or \u003cstrong\u003eP2096\u003c\/strong\u003e on the \u003cstrong\u003eAD\u003c\/strong\u003e chassis.\u003c\/p\u003e\u003ch4\u003eAre connectors pre-installed for plug-and-play installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, OEM connectors are pre-wired.\u003c\/strong\u003e Apply light anti-seize to threads only, avoiding the sensing tip, and torque to factory spec.\u003c\/p\u003e\u003ch3\u003eThe Hyundai Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt for closed-loop ECU accuracy and thermal durability, this matched kit keeps your \u003cstrong\u003eAD\u003c\/strong\u003e Elantra emissions-compliant and CEL-free.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119470637304,"sku":"DS-EEQM6OUXB","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-hyundai-elantra-2017-2019-2-0l-1.jpg?v=1794722746","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-hyundai-elantra-2017-2019-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}