--- product_id: 449054619 title: "Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs" brand: "marsflex" price: "฿4340" currency: THB in_stock: true url: https://www.desertcart.co.th/products/449054619-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9040 store_origin: TH region: Thailand --- # Durable design 17.9 inch length OE specification fit Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs **Brand:** marsflex **Price:** ฿4340 **Availability:** ✅ In Stock ## Summary > 🚗 Elevate Your Drive with Marsflex – Where Performance Meets Precision! ## Quick Answers - **What is this?** Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs by marsflex - **How much does it cost?** ฿4340 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/449054619-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9040) ## Best For - marsflex enthusiasts ## Why This Product - Trusted marsflex brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seamless Installation:** Designed for easy plug-and-play installation, saving you time and hassle. - • **Peace of Mind Warranty:** Enjoy a 1-year warranty, reflecting our commitment to quality and customer satisfaction. - • **Compatibility Guaranteed:** Perfectly fits Honda Accord models from 2003-2007, ensuring a snug and secure fit. - • **Durability Meets Reliability:** Crafted from high-quality materials for a long-lasting lifespan. - • **Boost Your Engine's Performance:** Experience enhanced fuel efficiency and power with Marsflex's precision engineering. ## Overview The Marsflex Air Fuel Ratio O2 Oxygen Sensor 234-9040 is a high-quality replacement part designed specifically for Honda Accord models from 2003 to 2007. With a total length of 17.9 inches, this sensor ensures optimal engine performance and fuel economy while extending the life of your catalytic converter. Backed by a 1-year warranty, it guarantees reliability and ease of installation. ## Description MarsflexAir Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs ## Features - 🔧Cautions: Please check your vehicle fitment carefully in the product description to avoid any wrong purchase. Please check your part pictures with our pictures, especially the plug, it must be completely same. Or it will not fit your car - 🔧Application: Marsflex Air Fuel Ratio O2 Oxygen Sensor 234-9040 fit for 2003-2007 Accord EX L4 2.4L , 2007 Accord EX-L L4 2.4L, 2003-2007 Accord LX L4 2.4L, 2007 Accord Special Edition L4 2.4L, 2006-2007 Accord Value Package L4 2.4L, 2006 Accord LX Special Edition L4 2.4L, 2003-2005 Accord DX L4 2.4L, 2005 Accord SE L4 2.4L - 🔧Advantage: Made of high-quality materials, strong durability, to ensure service life, Marsflex O2 Sensor can improve engine performance and fuel economy,extend Catalytic Converter life - 🔧Easy Installation: Total length 17.9 nch. Manufactured to OE specification fit form and function, durable and easy installation - 🔧Warranty: 1-YEAR WARRANTY. ALL Marsflex oxygen sensors are extensively tested during manufacturing to guarantee quality, reliability, and above all, always meet or exceed the original equipment specifications ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Marsflex | | Item dimensions L x W x H | 5.91 x 2.17 x 2.17 inches | | Material | 234-9040 | | Style | Upstream | | Current Rating | 6 Amps | | Lower Temperature Rating | 150 Degrees Celsius | | Maximum Supply Voltage | 20 Volts | | Measurement Accuracy | Go & No-go Gauge | | Measuring Range | λ=0.6- ∞ | | Mounting Type | Flange Mount | | Output Type | Analog | | Response Time | 18 seconds | | Sensing Distance | 1000 Millimeters | | Specific Uses For Product | Oxygen Sensor | | Upper Temperature Rating | 930 Degrees Celsius | | Manufacturer | Marsmotor | | Item Weight | 4.2 ounces | | Product Dimensions | 5.91 x 2.17 x 2.17 inches | | Item model number | 234-9040 | | Manufacturer Part Number | APEL14057 | | Wattage | 15 watts | ## Product Details - **Brand:** Marsflex - **Item dimensions L x W x H:** 15 x 5.5 x 5.5 centimeters - **Material:** Metal - **Item weight:** 4.5 Ounces - **Style:** 234-9040 ## Images ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs - Image 1](https://m.media-amazon.com/images/I/61mfRWuSGVL.jpg) ## Questions & Answers **Q: What is the life expectancy of an oxygen sensor?** A: Heated oxygen sensors should be checked or replaced every 60,000 miles, while unheated oxygen sensors should be checked or replaced every 30,000 miles **Q: Do I need to replace all of the sensors at once?** A: It is best to replace O2 sensors in pairs. Because, replacing one sensor will cause the ECU to set a code for the other sensors. This is because the new sensor switching activity is much faster than that of the older aged sensors **Q: The oxygen sensor will not come out.** A: If you are using an open end wrench, try an O2 socket. If this fails, try a long ratchet or breaker bar in conjunction with your socket to generate more torque. After the sensor is removed, be sure to use a thread cleaner to clean up the bung threads **Q: Why does the fault code still exist after replacing the oxygen sensor?** A: 1 Oxygen sensor circuit failure **Q: Will this oxygen sensor work with my vehicle?** A: Marsflex oxygen sensor is consistent with OEM, please refer to the page information for compatibility information. You can check 'Amazon confirmed it' for confirmation, or provide us with your vehicle information and we will confirm it for you. ## Frequently Bought Together - Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9040 Compatible with Honda 2003-2007 Accord EX/EX-L/LX/DX/SE L4 2.4L, Replacement 36531-RAA-A02 36531RAAA02 1Pcs - Oxygen O2 Sensor Downstream 234-4797 for Honda Accord 2.4L 2003 2004 2005 2006 2007 - FOMIUZY High Flow Front Catalytic Converter Kit Direct-Fit Honda Accord 2003 2004 2005 2006 2007 2.4L --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/449054619-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9040](https://www.desertcart.co.th/products/449054619-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9040) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-29*