{"product_id":"o2-oxygen-sensor-upstream-downstream-for-land-rover-range-rover-range-rover-sport-2014-2019-3-0l-5-0l-supercharged","title":"O2 Oxygen Sensor Upstream Downstream for Land Rover Range Rover Range Rover Sport (2014-2019) 3.0L 5.0L Supercharged","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Upstream \u0026amp; Downstream O2 Oxygen Sensor Kit for 2014-2019 Land Rover Range Rover,Range Rover Sport (L405 \/ L494)\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This 6-piece upstream, mid-catalyst, and downstream oxygen sensor kit restores closed-loop air-fuel metering and catalyst monitoring for 2014-2019 Land Rover Range Rover and Range Rover Sport (\u003cstrong\u003eL405\u003c\/strong\u003e\/\u003cstrong\u003eL494\u003c\/strong\u003e) supercharged models.\u003c\/p\u003e\u003ch3\u003eThe Stock Land Rover Range Rover,Range Rover Sport Sensor Failure\u003c\/h3\u003e\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eL405\u003c\/strong\u003e and \u003cstrong\u003eL494\u003c\/strong\u003e platforms with \u003cstrong\u003eAJ126\u003c\/strong\u003e 3.0L V6 and \u003cstrong\u003eAJ133\u003c\/strong\u003e 5.0L V8 supercharged engines endure severe exhaust gas temperatures and thermal cycling. Over time, carbon fouling, silicone contamination, and heater circuit burnout degrade zirconia response and fracture internal ceramic elements. Lazy upstream switching triggers \u003cstrong\u003eP0135\u003c\/strong\u003e, \u003cstrong\u003eP0155\u003c\/strong\u003e, or fuel trim faults like \u003cstrong\u003eP0171\u003c\/strong\u003e and \u003cstrong\u003eP0174\u003c\/strong\u003e, forcing rich open-loop operation.\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 heater circuit codes (\u003cstrong\u003eP0135\u003c\/strong\u003e\/\u003cstrong\u003eP0155\u003c\/strong\u003e), slow response faults, or catalyst efficiency codes (\u003cstrong\u003eP0420\u003c\/strong\u003e\/\u003cstrong\u003eP0430\u003c\/strong\u003e).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eErratic Fuel Trims:\u003c\/strong\u003e Sluggish voltage switching skews ECU fuel trims, causing rough idle and hesitation under supercharger boost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcessive Fuel Consumption:\u003c\/strong\u003e Rich open-loop fueling washes down cylinder walls, overheats catalytic substrates, and fails emissions tests.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eThe Direct-Fit Zirconia Oxygen Sensor Solution\u003c\/h3\u003e\u003cp\u003eThis matched 6-sensor kit replaces all bank 1 and bank 2 upstream, mid-catalyst, and downstream sensors simultaneously to eliminate cross-bank voltage lag. Constructed with corrosion-resistant stainless steel shells, dual protective shields, and fast-lightoff planar zirconia elements, each sensor resists thermal shock and moisture intrusion. Factory-keyed connectors and anti-seize coated threads match OE specifications for \u003cstrong\u003e234-5156\u003c\/strong\u003e, \u003cstrong\u003e234-4791\u003c\/strong\u003e, and \u003cstrong\u003e234-4794\u003c\/strong\u003e without splicing.\u003c\/p\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2x Upstream Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003e2x Mid-Catalyst Oxygen Sensors\u003c\/li\u003e\n\u003cli\u003e2x 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;\"\u003e2014-2019 Land Rover Range Rover,Range Rover Sport\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;\"\u003eAJ126 3.0L V6 Supercharged \u0026amp; AJ133 5.0L V8 Supercharged \/ L405, L494\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;\"\u003eDirect-Fit Planar Zirconia \/ 6-Sensor Upstream, Mid-Catalyst \u0026amp; Downstream Set\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;\"\u003e234-5156, 234-4791, 234-4794\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e2014-2019 Land Rover Range Rover (\u003cstrong\u003eL405\u003c\/strong\u003e) 3.0L V6 Supercharged (\u003cstrong\u003eAJ126\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e2014-2019 Land Rover Range Rover Sport (\u003cstrong\u003eL494\u003c\/strong\u003e) 3.0L V6 Supercharged (\u003cstrong\u003eAJ126\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e2014-2018 Land Rover Range Rover (\u003cstrong\u003eL405\u003c\/strong\u003e) 5.0L V8 Supercharged (\u003cstrong\u003eAJ133\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003e2014-2018 Land Rover Range Rover Sport (\u003cstrong\u003eL494\u003c\/strong\u003e) 5.0L V8 Supercharged (\u003cstrong\u003eAJ133\u003c\/strong\u003e)\u003c\/li\u003e\n\u003cli\u003eExclusions: Naturally aspirated 5.0L, diesel, and 2019 5.0L V8 Supercharged applications are not listed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\u003ch4\u003eDoes this fit the L405 \/ L494 Range Rover,Range Rover Sport?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This is a direct fit for the 2014-2019 Land Rover Range Rover,Range Rover Sport equipped with the \u003cstrong\u003eAJ126 3.0L V6 Supercharged\u003c\/strong\u003e engine and 2014-2018 models with the \u003cstrong\u003eAJ133 5.0L V8 Supercharged\u003c\/strong\u003e engine. \u003cstrong\u003eNaturally aspirated 5.0L, diesel, and 2019 5.0L Supercharged models are excluded; confirm your engine before ordering.\u003c\/strong\u003e\u003c\/p\u003e\u003ch4\u003eWill this clear P0135, P0171, and P0420\/P0430 sensor codes?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes, when triggered by worn O2 sensors.\u003c\/strong\u003e Replacing all six sensors restores accurate air-fuel and post-catalyst monitoring for \u003cstrong\u003e234-5156\u003c\/strong\u003e, \u003cstrong\u003e234-4791\u003c\/strong\u003e, and \u003cstrong\u003e234-4794\u003c\/strong\u003e positions. Clear ECU fault memory and verify no exhaust leaks remain.\u003c\/p\u003e\u003ch4\u003eAre harnesses plug-and-play for installation?\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e Each sensor includes OE-length wiring and factory connectors for direct installation. Thread into clean exhaust bungs and torque to specification.\u003c\/p\u003e\u003ch3\u003eThe Land Rover Precision Standard\u003c\/h3\u003e\u003cp\u003eEuropean supercharged engines depend on rapid closed-loop lambda feedback to protect catalytic substrates and maintain peak efficiency. Replacing all six sensors as a matched set restores factory ECU precision and CEL-free operation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":68119240409336,"sku":"DS-E9PWR6XNK","price":148.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-land-rover-range-rover-range-rover-sport-2014-2019-3-0l-5-0l-supercharged-1.jpg?v=1794717719","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-land-rover-range-rover-range-rover-sport-2014-2019-3-0l-5-0l-supercharged","provider":"Performance Chip Tuning","version":"1.0","type":"link"}