---
product_id: 455330171
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: "10398 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/455330171-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9040
store_origin: KG
region: Kyrgyzstan
---

# 6 Amps current rating 17.9 inch total length Operates up to 930°C 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:** 10398 som
**Availability:** ✅ In Stock

## Summary

> 🚗 Tune your ride, save your fuel, own the road!

## 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?** 10398 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/455330171-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

- • **Fuel Economy Booster:** Enhances engine efficiency to save on gas and extend catalytic converter life
- • **Durability That Lasts:** High-quality materials built to withstand extreme temperatures up to 930°C
- • **Precision Engine Tuning:** Optimized air-fuel ratio for peak Honda Accord performance
- • **Plug & Play Installation:** OE-spec fit ensures hassle-free, direct replacement in minutes
- • **Reliable Quality Assurance:** Backed by 1-year warranty and rigorous factory testing for peace of mind

## Overview

The Marsflex Air Fuel Ratio O2 Oxygen Sensor 234-9040 is a precision-engineered upstream sensor designed specifically for 2003-2007 Honda Accord 2.4L models. It features a durable build capable of withstanding temperatures up to 930°C, a 6 Amp current rating, and a 17.9-inch length for perfect fitment. This sensor improves engine performance, fuel economy, and catalytic converter longevity, with easy OE-spec installation and a 1-year warranty ensuring reliability and peace of mind.

## Description

Full description not available

## 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:** 5.91 x 2.17 x 2.17 inches
- **Material:** 234-9040
- **Style:** Upstream
- **Current Rating:** 6 Amps

## 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good buy
*by S***A on May 11, 2025*

As described

### ⭐⭐⭐⭐⭐ Excellent product, fixed the checked engine light
*by B***R on January 30, 2025*

I have a 2006 Honda Avvord EX V6. The check engine dash indicator came on, and my OBD2 reader reported it a bank 2 sensor 1 (front of car) fault. Replacing the oxygen sensor with this product solved the problem. Just a month later, the OBD2 reader reported it a bank 1 sensor 1 (firewall side) fault, so I ordered another and installed it. Now, no more faults!:)

### ⭐ Worked for a week
*by T***R on March 26, 2024*

This piece is faulty. It sorted out and a electrical code came up. I swapped it out with a normal priced one and it solved the problem. Through trial and error I find out the only faulty peice is the one I got for cheap here. And now I can't get refunded because I waited to long. You get what you pay for. If you decide to try these out make sure you try it fast and of it didn't work for you then return it so you can save yourself some money.

## 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

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-05-25*