--- product_id: 453117066 title: "Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030" brand: "marsflex" price: "255.67 DT" currency: TND in_stock: true reviews_count: 9 category: "Marsflex" url: https://www.desertcart.tn/products/453117066-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9042 store_origin: TN region: Tunisia --- # 12V max supply voltage 18s fast response time 150°C to 930°C operating range Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 **Brand:** marsflex **Price:** 255.67 DT **Availability:** ✅ In Stock ## Summary > 🚗 Upgrade your ride’s brain with precision sensing — don’t get left behind! ## Quick Answers - **What is this?** Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 by marsflex - **How much does it cost?** 255.67 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/453117066-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9042) ## 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 - • **Plug & Play Fitment:** Exact OE spec fit for Toyota & Lexus models, ensuring hassle-free installation. - • **Durable High-Temp Build:** Operates reliably from 150°C up to 930°C, built to last under extreme conditions. - • **Extended Catalytic Life:** Improves emissions control, helping your catalytic converter last longer. - • **Precision Engine Tuning:** Optimized air-fuel ratio sensing for peak engine performance and fuel efficiency. - • **Trusted Quality Assurance:** Backed by 1-year warranty and rigorous testing to exceed OEM standards. ## Overview The Marsflex Air Fuel Ratio O2 Oxygen Sensor 234-9042 is a high-quality upstream sensor compatible with select Toyota and Lexus models. Engineered to meet or exceed OEM specifications, it delivers precise air-fuel mixture readings with a rapid 18-second response time. Built to withstand extreme temperatures from 150°C to 930°C, this sensor enhances engine performance, fuel economy, and catalytic converter longevity. Easy to install with exact plug compatibility, it comes with a 1-year warranty, making it a reliable and cost-effective replacement for your vehicle’s oxygen sensor. ## Description Buy Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030: Oxygen - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: It Works Like It Should!!!! - I got this oxygen sensor (it actually is an air-fuel ratio sensor) from China through desertcart for around $30, as I do not like to spend $181 for an OEM Denso sensor from Autozone. It looks like a high quality part, with anti-seize compound already applied on its thread. It was a perfect fit. Works like a charm. Highly recoommended. Review: Superbueno se los recomiendo 100% Tiene muy buena calidad ## 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 Oxygen Sensor 234-9042 fit for Toyota 2004-2007 Highlander Base/Limited 2006-2007 Highlander Hybrid/Hybrid Limited/Sport 2002-2006 Camry LE/XLE 2002-2003 Camry SE 2004-2006 Camry SE 2004-2006 Sienna CE/LE 2006 Sienna XLE Limited 2004-2005 Sienna XLE Limited 2004-2006 Sienna XLE 2004-2008 Solara SE/SLE 2007-2008 Solara Sport 2006 Solara SE Sport LExis 2010-2011 RX350 Base 2007 RX350 Base 2004-2006 RX330 Base 2006-2008 RX440h Base 2004-2006 ES330 Base 2002-2003 ES330 Base - 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 14.3 inch. 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 | |---------------|-------| | ASIN | B0B1WX3NR7 | | Best Sellers Rank | #724,000 in Automotive ( See Top 100 in Automotive ) #4,249 in Automotive Replacement Oxygen Sensors | | Brand Name | Marsflex | | Current Rating | 6 Amps | | Customer Reviews | 4.1 4.1 out of 5 stars (141) | | Included Components | 1. 234-9042 Oxygen Sensor 2. Oxygen Sensor Instruction Manual | | Item Dimensions | 5.91 x 2.17 x 2.17 inches | | Item Weight | 4 Ounces | | Lower Temperature Rating | 150 Degrees Celsius | | Manufacturer | Marsmotor | | Material Type | 234-9042 | | Maximum Supply Voltage | 12 Volts | | Measurement Accuracy | Go & No-go Gauge | | Measuring Range | λ=0.6- ∞ | | Model | APEL14055 | | Mounting Type | Flange Mount | | Output Type | electrical signal | | Response Time | 18 seconds | | Sensing Distance | 1000 Millimeters | | Specific Uses For Product | Oxygen Sensor | | Style Name | Upstream | | Upper Temperature Rating | 930 Degrees Celsius | ## Product Details - **Brand:** Marsflex - **Item Weight:** 4 Ounces - **Item dimensions L x W x H:** 5.91 x 2.17 x 2.17 inches - **Material:** 234-9042 - **Style:** Upstream ## Images ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Image 1](https://m.media-amazon.com/images/I/615QemlUA1L.jpg) ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Image 2](https://m.media-amazon.com/images/I/61F3eLB8gFL.jpg) ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Image 3](https://m.media-amazon.com/images/I/61j-eIJlkoL.jpg) ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Image 4](https://m.media-amazon.com/images/I/61mX1yg-+FL.jpg) ![Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Image 5](https://m.media-amazon.com/images/I/614YZDcLRgL.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 2 The mixture is too rich 3 The mixture is too lean 4 The three-way catalytic converter is damaged or fails 5 Damaged ECM **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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ It Works Like It Should!!!! *by A***N on April 14, 2024* I got this oxygen sensor (it actually is an air-fuel ratio sensor) from China through Amazon for around $30, as I do not like to spend $181 for an OEM Denso sensor from Autozone. It looks like a high quality part, with anti-seize compound already applied on its thread. It was a perfect fit. Works like a charm. Highly recoommended. ### ⭐⭐⭐⭐⭐ Review *by G***N on September 28, 2025* Superbueno se los recomiendo 100% Tiene muy buena calidad ### ⭐ DO NOT BUY *by M***H on July 27, 2025* installed the part it fits as stated that it would in the description however, my check engine light is still on and my mechanic said that it is a faulty sensor. I just wasted money do not buy. ## Frequently Bought Together - Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9042 Compatible with Toyota Camry Sienna Solara Highlander Lexus RX350 RX400h ES330 ES300 Replacement 89467-06040 89467-0E030 - Marsflex Oxygen O2 Sensor 234-4622 13355 Downstream Heated Compatible with Toyota Camry Avalon Sienna 4Runner RAV4 Solara Matrix Lexus ES300 Pontiac Vibe,250-24360 Replacement - Offset Oxygen Sensor Socket, 3/8-Inch Drive, 7/8-Inch (22mm), Wire Gate Accesses Sensor from Side, Preventing Damage to Wires, Universal for Most Cars --- ## 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.tn/products/453117066-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9042](https://www.desertcart.tn/products/453117066-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9042) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-06*