{"product_id":"maxfavor-oxygen-sensor-pair-for-nissan-altima-maxima-2008-2010-upstream-234-9038-downstream-234-4381-direct-fit-durable-rep","title":"Maxfavor Oxygen Sensor Pair for Nissan Altima \u0026 Maxima 2008-2010 — Upstream 234-9038 \u0026 Downstream 234-4381, Direct-Fit Durable Rep","description":"\u003cp\u003e\u003cstrong\u003eThis Maxfavor two-piece oxygen sensor set (234-9038 upstream + 234-4381 downstream) replaces the factory O2 sensors on 2008–2010 Nissan Altima and Maxima 2.5L and 3.5L engines.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese Maxfavor sensors are direct-replacement oxygen sensors engineered to match OE fit and function for the specified Nissan models and years. Built from durable materials and designed for a straightforward swap, the pair includes one upstream (pre-catalyst) sensor and one downstream (post-catalyst) sensor so you can address both diagnostic and performance needs at once.\u003c\/p\u003e\n\n\u003ch3\u003eHow will replacing both upstream and downstream sensors affect my car?\u003c\/h3\u003e\n\u003cp\u003eSwapping in new upstream and downstream sensors restores the engine control module's ability to read exhaust oxygen levels accurately. That helps the ECU better balance air\/fuel mixtures and monitor catalytic converter performance without making performance promises.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes 234-9038 upstream and 234-4381 downstream sensors for correct placement.\u003c\/li\u003e\n  \u003cli\u003eDirect-fit design reduces the need for modification or splicing.\u003c\/li\u003e\n  \u003cli\u003eDurable construction intended for long-term use in exhaust environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat should I check before buying these Maxfavor sensors?\u003c\/h3\u003e\n\u003cp\u003eVerify vehicle year, make, engine size, and existing connector type to be certain of compatibility. Compare the pictured sensors and connectors with the parts on your vehicle to confirm identical thread size, wiring, and plug orientation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with 2008–2010 Nissan Altima and Maxima 2.5L and 3.5L engines.\u003c\/li\u003e\n  \u003cli\u003eConfirm sensor part numbers (234-9038 upstream, 234-4381 downstream) match your replacement needs.\u003c\/li\u003e\n  \u003cli\u003eInspect connector shape and thread pitch against your original sensors before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow difficult is installation and what tools are needed?\u003c\/h3\u003e\n\u003cp\u003eInstallation is a common DIY job if you have basic hand tools and a suitable oxygen sensor socket or wrench. The typical steps are removal of the old sensor, cleaning the threaded port, comparing parts, installing the new sensor hand-tight then torqued to spec, and reconnecting the electrical plug.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequired tools: oxygen sensor socket, ratchet, anti-seize (if not pre-applied), and possibly penetrating oil.\u003c\/li\u003e\n  \u003cli\u003eRecommended steps: locate sensor, remove old unit, clean threads, install new sensor, secure wiring clear of heat sources.\u003c\/li\u003e\n  \u003cli\u003eIf codes remain after installation, clear diagnostic trouble codes with an OBD-II scanner.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat warranty and post-purchase support does Maxfavor provide?\u003c\/h3\u003e\n\u003cp\u003eMaxfavor backs the sensors with a one-year unlimited-miles warranty and accepts returns if the parts don’t fit. Customer support is available by email for fitment questions or replacement assistance.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1-Year unlimited miles warranty from Maxfavor on manufacturing defects.\u003c\/li\u003e\n  \u003cli\u003eReturn accepted if the sensors do not match vehicle fitment—keep the item clean and packaged.\u003c\/li\u003e\n  \u003cli\u003eSeller response typically within 24 hours for fitment or installation inquiries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Maxfavor 2-piece oxygen sensor set is for Nissan owners, independent mechanics, and DIY enthusiasts who need a reliable, direct-replacement upstream and downstream O2 sensor solution for 2008–2010 Altima and Maxima 2.5L and 3.5L engines. Choose this pair if you want matching sensors designed for correct placement, straightforward installation, and manufacturer support without altering vehicle wiring or exhaust hardware.\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: Do these sensors fit my 2009 Nissan Altima 2.5L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—this set is specified for 2008–2010 Altima and Maxima 2.5L and 3.5L engines; verify part numbers and connector shape against your original sensors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is special programming required after installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Generally no; reinstalling the sensors usually requires clearing any OBD-II codes, but no ECU reprogramming is typically needed.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Maxfavor","offers":[{"title":"Default Title","offer_id":55171227091287,"sku":"B07K896S8V","price":50.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/maxfavor-front-of-sensor-pair.jpg?v=1790440914","url":"https:\/\/britishgarage.co.uk\/products\/maxfavor-oxygen-sensor-pair-for-nissan-altima-maxima-2008-2010-upstream-234-9038-downstream-234-4381-direct-fit-durable-rep","provider":"British Garage","version":"1.0","type":"link"}