{"product_id":"o2-oxygen-sensor-upstream-downstream-for-lexus-gs-2007-2008-3-5l","title":"O2 Oxygen Sensor Upstream Downstream for Lexus GS (2007-2008) 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Kit for 2007-2008 Lexus GS (S190)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 4-piece oxygen sensor kit monitors upstream and downstream exhaust gas levels on the 2007-2008 Lexus GS (\u003cstrong\u003eS190\u003c\/strong\u003e) \u003cstrong\u003e2GR-FSE 3.5L V6\u003c\/strong\u003e to maintain accurate fuel trims and emissions compliance.\u003c\/p\u003e\u003ch3\u003eThe Stock Lexus GS Sensor Failure\u003c\/h3\u003e\u003cp\u003eThrough repeated heat cycles on the \u003cstrong\u003eS190\u003c\/strong\u003e chassis with the \u003cstrong\u003e2GR-FSE 3.5L V6\u003c\/strong\u003e, factory zirconia sensors suffer carbon fouling, silicone contamination, and internal heater burnout. Sluggish upstream air-fuel response skews Bank 1 and Bank 2 fuel trims, while fatigued downstream units trigger \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e catalyst codes or \u003cstrong\u003eP0135\/P0155\u003c\/strong\u003e heater faults. Replacing only one failed sensor leaves aged opposing-bank units lagging, causing uneven 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 \/ DTCs:\u003c\/strong\u003e Triggers \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0155\u003c\/strong\u003e, or \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e from slow response or heater failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Trim Imbalance:\u003c\/strong\u003e Causes rough idle and hesitation across Bank 1 and Bank 2.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmissions \u0026amp; Economy Loss:\u003c\/strong\u003e Increases fuel consumption, exhaust odor, and inspection failures.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit 4-Piece Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eThis matched 4-piece direct-fit kit replaces both upstream air-fuel ratio sensors and both downstream heated oxygen sensors simultaneously on the \u003cstrong\u003eS190\u003c\/strong\u003e Lexus GS. Built to OE interchange specs \u003cstrong\u003e234-9051\u003c\/strong\u003e and \u003cstrong\u003e234-4521\u003c\/strong\u003e, each unit features corrosion-resistant stainless steel housings, heat-shielded harnesses, and factory-keyed connectors. Direct-thread bungs enable clean plug-and-play installation without cutting or splicing, restoring synchronized closed-loop lambda feedback across both exhaust banks.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2 Upstream Air-Fuel Oxygen Sensors (\u003cstrong\u003e234-9051\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e2 Downstream Oxygen Sensors (\u003cstrong\u003e234-4521\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;\"\u003e2007-2008 Lexus GS (GS 350)\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;\"\u003e2GR-FSE 3.5L V6 \/ S190\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; Sensor Spec\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e2 Upstream Air-Fuel + 2 Downstream Heated O2\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\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;\"\u003e234-9051, 234-4521\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e2007-2008 Lexus GS 3.5L (GS 350) — \u003cstrong\u003eS190\u003c\/strong\u003e Chassis \/ \u003cstrong\u003e2GR-FSE\u003c\/strong\u003e V6 (4-Piece Upstream \u0026amp; Downstream Set)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the S190 GS?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Fits 2007-2008 Lexus GS \u003cstrong\u003e2GR-FSE 3.5L V6\u003c\/strong\u003e models. \u003cstrong\u003eExcludes 2009-2015 models, IS 250 2.5L, IS 350 3.5L, and GS 450h.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135, P0155, or P0420\/P0430 codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, if sensor-related.\u003c\/strong\u003e Matched \u003cstrong\u003e234-9051\u003c\/strong\u003e and \u003cstrong\u003e234-4521\u003c\/strong\u003e units resolve heater and switching faults; persistent \u003cstrong\u003eP0420\/P0430\u003c\/strong\u003e codes require catalytic inspection.\u003c\/p\u003e\u003ch4\u003eAre wire splicing or adapters required?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e Each sensor includes OE-length harnesses and keyed connectors for plug-and-play installation; keep anti-seize off sensor tips.\u003c\/p\u003e\u003ch3\u003eThe Lexus Precision Standard\u003c\/h3\u003e\u003cp\u003eBuilt for CEL-free operation on the \u003cstrong\u003e2GR-FSE\u003c\/strong\u003e platform, this matched 4-piece sensor kit restores factory fuel control and throttle response.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119473324280,"sku":"DS-E1OGZ05NM","price":119.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-lexus-gs-2007-2008-3-5l-1.jpg?v=1794722974","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-lexus-gs-2007-2008-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}