{"product_id":"a-premium-downstream-o2-oxygen-sensor-for-nissan-infiniti-heated-4-wire-single-pack","title":"A-Premium Downstream O2 Oxygen Sensor for Nissan \u0026 Infiniti — Heated 4-Wire Single Pack","description":"\u003cp\u003e\u003cstrong\u003eA-Premium Downstream O2 Oxygen Sensor is a direct-fit, heated 4-wire replacement sensor designed to restore correct downstream exhaust oxygen readings on compatible Nissan and Infiniti V6\/L4 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis aftermarket downstream oxygen sensor from A-Premium is engineered to match the electrical and mounting specifications of many Nissan and Infiniti vehicles, including select Altima, 370Z, Q50, Q60, Q70, QX models and others. It uses a threaded, heated 4-wire design for rapid warm-up and consistent signal transmission to the vehicle’s engine control system. The item ships individually in a box and is identified by common reference numbers 250-241106, 234-4535, 24167 and related OEM cross-references.\u003c\/p\u003e\n\n\u003ch3\u003eWhich vehicles will this A-Premium downstream O2 sensor fit?\u003c\/h3\u003e\n\u003cp\u003eThe A-Premium downstream sensor fits a range of Nissan and Infiniti models with specified engine sizes and production years. Fitment varies by downstream position (left\/right\/front\/rear) and exact model\/version; always confirm fit with your vehicle details before ordering. Below are the primary compatible applications listed for this part.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInfiniti Q40 (2015) and Q50\/Q60 (2014–2015) with V6 3.7L engines.\u003c\/li\u003e\n  \u003cli\u003eInfiniti Q70\/Q70L (2014–2019) and QX50\/QX70 (2015–2017) V6 3.7L models for downstream LH\/RH.\u003c\/li\u003e\n  \u003cli\u003eNissan 370Z (2014–2020) V6 3.7L and Altima (2013–2018) L4 2.5L downstream applications (B1S2 noted).\u003c\/li\u003e\n  \u003cli\u003eAdditional fits include Juke, JX35, QX60, Pathfinder, Murano, Quest and Altima V6 variants—see product note for position-specific compatibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does this sensor match the original equipment specifications?\u003c\/h3\u003e\n\u003cp\u003eThis A-Premium unit is built as a threaded, heated oxygen sensor with a female connector and four wires to match OEM electrical connections. The heated element shortens warm-up time and helps the sensor reach operating temperature faster for reliable downstream readings. The threaded mounting and connector gender align with factory hardware for a straightforward swap.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWire count: 4 (heated sensor wiring compatible with factory harness).\u003c\/li\u003e\n  \u003cli\u003eMounting: standard threaded housing for direct replacement.\u003c\/li\u003e\n  \u003cli\u003eConnector: female plug designed to mate to OEM wiring harness.\u003c\/li\u003e\n  \u003cli\u003ePackaging: single sensor shipped in a protective box for one-to-one replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying to avoid returns?\u003c\/h3\u003e\n\u003cp\u003eBecause this part covers many model years and downstream positions, verify exact match to your vehicle’s part position and connector type before purchase. Use the seller’s vehicle compatibility tool (for example, Amazon Confirmed Fit) and read the product note thoroughly. If the note or confirmed fit result doesn’t match your VIN, don’t proceed to avoid installation problems or returns.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm the sensor position (downstream LH\/RH, front, rear) required by your vehicle.\u003c\/li\u003e\n  \u003cli\u003eCross-check reference numbers: 250-241106, 234-4535, 24167, 226A01KC0A, etc.\u003c\/li\u003e\n  \u003cli\u003eCompare connector gender and wire count with your existing sensor plug.\u003c\/li\u003e\n  \u003cli\u003eWhen in doubt, provide your VIN to a mechanic or use an OEM parts lookup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will replacing the downstream oxygen sensor impact my vehicle?\u003c\/h3\u003e\n\u003cp\u003eReplacing a faulty downstream O2 sensor restores accurate post-catalyst oxygen readings to the engine control module, which helps the vehicle maintain proper fuel trims and emissions monitoring. While downstream sensors are not typically used for fuel mixture control like upstream sensors, they play an important role in emissions system diagnostics and catalytic converter performance monitoring.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHelps maintain correct emissions monitoring and diagnostic feedback.\u003c\/li\u003e\n  \u003cli\u003eProvides stable downstream lambda readings for the vehicle’s ECU.\u003c\/li\u003e\n  \u003cli\u003eMatches OEM form factor to simplify installation and minimize wiring issues.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This A-Premium downstream oxygen sensor is intended for owners or technicians replacing a downstream O2 sensor on compatible Nissan and Infiniti models listed above. It's suited for DIY mechanics familiar with exhaust-sensor replacement, as well as repair shops looking for an affordable aftermarket direct-fit alternative. Always verify fitment for your specific vehicle and model year before purchase to ensure proper compatibility.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this sensor heated and how many wires does it have?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The A-Premium downstream O2 sensor is a heated sensor with four wires for proper ECU connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I confirm this sensor fits my Nissan or Infiniti?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use the seller's vehicle compatibility tool (e.g., Amazon Confirmed Fit), match reference numbers, and compare connector and position details.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"A-Premium","offers":[{"title":"Default Title","offer_id":48084639187102,"sku":"B08VRCP6QX","price":39.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/a-premium-downstream-sensor-front-view.jpg?v=1785861318","url":"https:\/\/northtrailauto.ca\/products\/a-premium-downstream-o2-oxygen-sensor-for-nissan-infiniti-heated-4-wire-single-pack","provider":"North Trail Auto","version":"1.0","type":"link"}