{"product_id":"o2-oxygen-sensor-upstream-downstream-for-infiniti-qx80-2016-2019-5-6l","title":"O2 Oxygen Sensor Upstream Downstream for Infiniti QX80 (2016-2019) 5.6L","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 2016-2019 Infiniti QX80 (Z62)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 4-piece O2 sensor kit monitors pre- and post-catalyst exhaust on the \u003cstrong\u003eZ62\u003c\/strong\u003e Infiniti QX80 \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e, regulating closed-loop fuel trim.\u003c\/p\u003e\u003ch3\u003eThe Stock Infiniti QX80 Oxygen Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory sensors on the \u003cstrong\u003eZ62\u003c\/strong\u003e with the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e endure severe thermal cycling, exhaust soot, and condensation. Over time, internal zirconia elements develop micro-fractures from heat soak while heater circuits suffer high resistance or open-circuit burnout. Oil blow-by and fuel deposits simultaneously foul the porous platinum electrodes. This sluggish voltage switching triggers fuel-trim faults like \u003cstrong\u003eP0171\/P0174\u003c\/strong\u003e, heater codes, and converter DTCs such as \u003cstrong\u003eP0420\/P0430\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\u003eCheck Engine Light \/ DTCs:\u003c\/strong\u003e Triggers slow-response or catalyst codes including \u003cstrong\u003eP0130\/P0150\u003c\/strong\u003e, \u003cstrong\u003eP2A00\/P2A03\u003c\/strong\u003e, and \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRough Idle \u0026amp; Hesitation:\u003c\/strong\u003e Corrupted upstream signals force erratic closed-loop fuel corrections or limp fueling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePoor MPG \u0026amp; Emissions Failure:\u003c\/strong\u003e Over-rich fueling fouls plugs and fails state emissions tests.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit 4-Sensor Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eReplacing all four sensors simultaneously restores balanced bank-to-bank air-fuel metering across the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e. Each unit features a fast-acting planar zirconia element inside a laser-welded stainless housing with louvered shields that resist thermal shock. OEM-length heat-resistant harnesses and factory-style weatherproof connectors deliver clean signal transmission without splicing. Replacing OEM parts \u003cstrong\u003e234-9148\u003c\/strong\u003e, \u003cstrong\u003e234-8020\u003c\/strong\u003e, and \u003cstrong\u003e234-8021\u003c\/strong\u003e, these sensors thread directly into stock bungs.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 x Upstream Air-Fuel Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003e2 x 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;\"\u003e2016-2019 Infiniti QX80\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;\"\u003eVK56VD 5.6L V8 \/ Z62\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;\"\u003e2 Upstream A\/F + 2 Downstream O2 (Direct-Fit)\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;\"\u003e234-9148, 234-8020, 234-8021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2016 Infiniti QX80 5.6L V8 (\u003cstrong\u003eZ62\u003c\/strong\u003e; pre-August 1, 2015 builds may differ)\u003c\/li\u003e\n\u003cli\u003e2017-2019 Infiniti QX80 5.6L V8 (\u003cstrong\u003eZ62\u003c\/strong\u003e)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the Z62 QX80?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Direct fit for 2016-2019 Infiniti QX80 \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e models. \u003cstrong\u003e2016 builds before August 1, 2015 may require a different set; confirm engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0130 or P0420\/P0430 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when sensor-induced.\u003c\/strong\u003e New units resolve \u003cstrong\u003eP0130\/P0150\u003c\/strong\u003e and \u003cstrong\u003eP2A00\/P2A03\u003c\/strong\u003e faults; persistent \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes require checking catalyst condition.\u003c\/p\u003e\u003ch4\u003eIs wiring splicing or hardware needed?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e OEM-style plugs match \u003cstrong\u003e234-9148\u003c\/strong\u003e, \u003cstrong\u003e234-8020\u003c\/strong\u003e, and \u003cstrong\u003e234-8021\u003c\/strong\u003e—apply anti-seize to threads only.\u003c\/p\u003e\u003ch3\u003eThe Infiniti Heavy-Duty Standard\u003c\/h3\u003e\u003cp\u003eBuilt for \u003cstrong\u003eZ62\u003c\/strong\u003e towing and thermal durability, this matched 4-sensor kit stabilizes closed-loop calibration. Accurate feedback protects converters and keeps the \u003cstrong\u003eVK56VD 5.6L V8\u003c\/strong\u003e running cleanly.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119503667448,"sku":"DS-ENZL12FC9","price":141.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-infiniti-qx80-2016-2019-5-6l-1.jpg?v=1794724408","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-infiniti-qx80-2016-2019-5-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}