---
product_id: 518802794
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: "€ 73.68"
currency: EUR
in_stock: true
reviews_count: 5
category: "Marsflex"
url: https://www.desertcart.gr/products/518802794-marsflex-air-fuel-ratio-o2-oxygen-sensor-upstream-234-9042
store_origin: GR
region: Greece
---

# Boosts fuel economy Easy 14.3-inch install OE-spec precision fit 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:** € 73.68
**Availability:** ✅ In Stock

## Summary

> ⚡ Upgrade your ride’s brain with precision and power!

## 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?** € 73.68 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/518802794-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

- • **Precision OE Fit:** Engineered to match original equipment specs for seamless compatibility with Toyota & Lexus models.
- • **Peace of Mind Warranty:** Backed by a 1-year warranty and rigorous quality testing for reliable, long-term use.
- • **Fuel Efficiency Booster:** Optimizes air-fuel ratio to enhance engine performance and reduce fuel consumption.
- • **Durability You Can Trust:** Crafted from high-quality materials to extend catalytic converter life and sensor longevity.
- • **Plug & Play Installation:** 14.3-inch length and exact plug match ensure a hassle-free, quick replacement experience.

## Overview

The Marsflex Air Fuel Ratio O2 Oxygen Sensor 234-9042 is a high-quality replacement sensor compatible with select Toyota and Lexus models. Designed to meet or exceed OEM specifications, it improves engine efficiency, fuel economy, and catalytic converter lifespan. Featuring a precise plug match and 14.3-inch length, it ensures easy installation and reliable performance, all backed by a 1-year warranty.

## Description

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

Review: 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: Only good for couple months

## 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 | #44,403 in Automotive ( See Top 100 in Automotive ) #119 in Car Exhaust Oxygen Sensors |
| Item model number | APEL14055 |
| Manufacturer | Marsflex |
| Product Dimensions | 15.01 x 5.51 x 5.51 cm; 113.4 g |

## Product Details

- **Brand:** Marsflex
- **Item dimensions L x W x H:** 15 x 5.5 x 5.5 centimeters
- **Item weight:** 4 Ounces
- **Material:** 234-9042
- **Style:** Modern

## 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)

## Available Options

This product comes in different **Size, Style** options.

## 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

### ⭐⭐⭐⭐⭐ Review
*by A***N on 14 April 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 M***N on 8 December 2024*

Only good for couple months

### ⭐⭐⭐⭐⭐ Review
*by R***Y on 24 March 2025*

One month in and still good fix my lean code high quality item works very well I checked the live data and it's the same as the other 02 sensor

## 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

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-04-25*