{"product_id":"maxfavor-o2-sensor-2-pc-kit-234-9038-234-4381-for-2008-2010-nissan-altima-maxima-upstream-downstream-direct-fit-plug-and-pla","title":"Maxfavor O2 Sensor 2-Pc Kit (234-9038\/234-4381) for 2008–2010 Nissan Altima \u0026 Maxima — Upstream\/Downstream Direct-Fit Plug-and-Pla","description":"\u003cb\u003eMaxfavor 2Pcs Oxygen Sensor set (234-9038 upstream + 234-4381 downstream) is a direct-fit replacement kit engineered to restore proper O2 sensing on 2008–2010 Nissan Altima and Maxima 2.5L and 3.5L engines.\u003c\/b\u003e\n\n\u003cp\u003eIf your vehicle’s check engine light, fuel economy, or idle behavior points toward an oxygen sensor issue, this matched upstream and downstream pair from Maxfavor is built to match factory fitment and wiring layout. Each sensor is manufactured from durable materials and pre-configured to plug into the original harness so you can replace both bank sensors in one service interval. The kit is intended to help your engine control module regain correct air-fuel data without swapping multiple aftermarket parts.\u003c\/p\u003e\n\n\u003ch3\u003eHow do these sensors fit my 2008–2010 Nissan Altima or Maxima?\u003c\/h3\u003e\n\u003cp\u003eThese two sensors are specified for the 2.5L and 3.5L engines and designed to match OE mounting points and electrical connectors. Verify compatibility by cross-checking the part numbers and physically comparing connectors and thread types before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes upstream (234-9038) and downstream (234-4381) O2 sensors\u003c\/li\u003e\n  \u003cli\u003eFits 2008, 2009, 2010 Nissan Altima and Maxima 2.5L\/3.5L engines\u003c\/li\u003e\n  \u003cli\u003eDirect-fit plug-and-play wiring for original connector compatibility\u003c\/li\u003e\n  \u003cli\u003eCompare pictured sensor shape, connector, and thread pitch to your old parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat steps are recommended for a safe, correct installation?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward if you have basic hand tools and a sensor socket. Remove the old sensor, clean the threaded port, and gently thread in the new unit, taking care not to damage the harness; after installation, clear codes if the vehicle had a stored diagnostic trouble code.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLocate sensor positions and remove with an appropriate socket\u003c\/li\u003e\n  \u003cli\u003eCompare new and old sensors to confirm match before final tightening\u003c\/li\u003e\n  \u003cli\u003eClean threads to ensure a proper seal and avoid leaks\u003c\/li\u003e\n  \u003cli\u003eTighten gently and secure wiring away from hot or moving parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat performance and durability features does the Maxfavor kit offer?\u003c\/h3\u003e\n\u003cp\u003eMaxfavor constructs these sensors from corrosion-resistant materials intended to endure exhaust exposure and temperature cycles. While no aftermarket part can promise identical longevity as every use case differs, the pair is built to provide stable oxygen readings and maintain catalytic converter monitoring when properly installed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh-quality materials resist heat and exhaust contaminants\u003c\/li\u003e\n  \u003cli\u003eDurable construction for consistent sensor output over time\u003c\/li\u003e\n  \u003cli\u003eFactory-style design for reliable emissions system monitoring\u003c\/li\u003e\n  \u003cli\u003eSold as a matched upstream\/downstream set for balanced replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying or returning this kit?\u003c\/h3\u003e\n\u003cp\u003eConfirm your vehicle year, engine size, and the original sensor part numbers against this listing and the photos. If the parts differ from your existing sensors, do not install; Maxfavor accepts returns within the warranty window when items are clean and packaged correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMatch your OEM part numbers and connector shape to the listing photos\u003c\/li\u003e\n  \u003cli\u003eCheck thread size and lead length for compatibility with your exhaust layout\u003c\/li\u003e\n  \u003cli\u003eContact seller support with fitment questions before installation\u003c\/li\u003e\n  \u003cli\u003eKeep items clean and in original packaging if returning under warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Maxfavor 2-piece oxygen sensor kit is aimed at do-it-yourselfers, independent mechanics, and fleet owners who need a cost-effective, direct-fit replacement for worn or failed O2 sensors on 2008–2010 Nissan Altima and Maxima 2.5L and 3.5L engines. It’s also suitable for anyone replacing both upstream and downstream sensors together to restore accurate emissions monitoring and engine control readings.\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: Will these sensors fit my 2009 Nissan Altima 2.5L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the Maxfavor set lists compatibility with 2008–2010 Altima 2.5L; confirm connector and thread match before installing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is there a warranty if the sensors fail early?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, Maxfavor includes a 1-year unlimited-mile warranty and accepts returns if the parts don’t fit.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Maxfavor","offers":[{"title":"Default Title","offer_id":48086785130654,"sku":"B07K896S8V","price":55.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/maxfavor-front-packaging-oxygen-sensor-pair.jpg?v=1785905099","url":"https:\/\/northtrailauto.ca\/products\/maxfavor-o2-sensor-2-pc-kit-234-9038-234-4381-for-2008-2010-nissan-altima-maxima-upstream-downstream-direct-fit-plug-and-pla","provider":"North Trail Auto","version":"1.0","type":"link"}