---
product_id: 18281064
title: "234-4509 O2 Oxygen Sensor"
brand: "denso"
price: "฿9049"
currency: THB
in_stock: true
reviews_count: 8
category: "Denso"
url: https://www.desertcart.co.th/products/18281064-234-4509-o2-oxygen-sensor
store_origin: TH
region: Thailand
---

# Boosts Fuel Efficiency Universal Fit for easy install Durable double protection layers 234-4509 O2 Oxygen Sensor

**Brand:** denso
**Price:** ฿9049
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your ride’s brain with precision oxygen sensing — don’t let inefficiency hold you back!

## Quick Answers

- **What is this?** 234-4509 O2 Oxygen Sensor by denso
- **How much does it cost?** ฿9049 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/18281064-234-4509-o2-oxygen-sensor)

## Best For

- denso enthusiasts

## Why This Product

- Trusted denso brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Easy Installation:** Comes with anti-seize compound and exact-fit clips for a smooth swap
- • **Robust Durability:** Stainless steel housing with double protection layers ensures long-lasting performance
- • **Fuel-Saving Efficiency:** Optimizes air-fuel mix to maximize mileage and reduce emissions
- • **Precision OE Standard Build:** Engineered with high-grade platinum & ceramics for flawless oxygen detection
- • **Universal Fit Compatibility:** Fits a wide range of vehicles for hassle-free replacement

## Overview

The Denso 234-4509 O2 Oxygen Sensor is a universal-fit, high-quality replacement part designed to accurately measure oxygen levels in your vehicle’s exhaust. Constructed with premium materials including stainless steel, platinum, and ceramics, it features double protection layers for enhanced durability. This sensor improves fuel efficiency, reduces emissions, and meets OE standards for reliable performance. Easy to install with included anti-seize compound and precise clips, it’s a trusted fix for check engine light issues and engine code errors.

## Description

Denso Oxygen Sensor is designed to detect the amount of oxygen in the exhaust stream. It is constructed from high quality stainless steel, porous polytetrafluoroethylene, fluorine rubber, aluminum oxide, high-grade platinum and ceramics. This Sensor features double protection layer, aluminum oxide trap layer, porous PTFE filter and stainless steel housing. It is manufactured with precision to meet OE standards. This oxygen sensor can be installed easily and ensures longevity.

Review: Fixed the 2007 Lexus RX350. - Resolved the computer code and Service Engine Light. Pretty easy to replace with just metric ratchet set, metric wrench and mallet. Hardest part was getting the old one off. Tried PB Blaster, but not sure that helped. Tried running the engine for awhile to get it nice and hot (be careful under there when it is hot, easy to get a nasty burn). I think the heat may have helped along with a mallet to pound on the wrench handle. Either that or just persistence. Comes with a bit of anti-seize compound. All the attachment clips fit exactly which is great because these are always a bear to get off without breaking. In this case can just cut and grab without having to try and save them. Highly recommended to fix this sensor code.
Review: Oxygen Sensor downstream - Exact fit for 2004 lexus rx330. Fixed check engine light issues.

## Features

- Fit type: Universal Fit
- Efficient Fuel Consumption
- Constructed from high quality material
- Designed to detect the amount of oxygen in the exhaust system

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0018JVJB6 |
| Best Sellers Rank | #113,257 in Automotive ( See Top 100 in Automotive ) #45,517 in Automotive Replacement Parts |
| Brand | Denso |
| Brand Name | Denso |
| Customer Reviews | 4.6 out of 5 stars 290 Reviews |
| Global Trade Identification Number | 00042511112728 |
| Included Components | Oxygen (O2) Sensor |
| Item Dimensions | 5.75 x 3.88 x 2.19 inches |
| Item Height | 2.19 inches |
| Item Type Name | Oxygen Sensor |
| Item Weight | 0.25 Pounds |
| Item dimensions L x W x H | 5.75 x 3.88 x 2.19 inches |
| Manufacturer | DENSO |
| Material | Stainless Steel, Zirconium |
| Material Type | Stainless Steel, Zirconium |
| Model | 234-4509 |
| Mounting Type | Thread-In |
| Output Type | Push-Pull |
| Specific Uses For Product | Replacement Oxygen (O2) Sensor |
| Style | Replacement Part |
| Style Name | Replacement Part |
| UPC | 042511112728 |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Denso
- **Item dimensions L x W x H:** 5.75 x 3.88 x 2.19 inches
- **Material:** Stainless Steel, Zirconium
- **Item Weight:** 4 ounces
- **Style:** Replacement Part

## Images

![234-4509 O2 Oxygen Sensor - Image 1](https://m.media-amazon.com/images/I/51hKYkf6-rL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fixed the 2007 Lexus RX350.
*by I***R on September 30, 2017*

Resolved the computer code and Service Engine Light. Pretty easy to replace with just metric ratchet set, metric wrench and mallet. Hardest part was getting the old one off. Tried PB Blaster, but not sure that helped. Tried running the engine for awhile to get it nice and hot (be careful under there when it is hot, easy to get a nasty burn). I think the heat may have helped along with a mallet to pound on the wrench handle. Either that or just persistence. Comes with a bit of anti-seize compound. All the attachment clips fit exactly which is great because these are always a bear to get off without breaking. In this case can just cut and grab without having to try and save them. Highly recommended to fix this sensor code.

### ⭐⭐⭐⭐⭐ Oxygen Sensor downstream
*by H***O on July 21, 2025*

Exact fit for 2004 lexus rx330. Fixed check engine light issues.

### ⭐⭐⭐⭐⭐ Replaced in 20 minutes, using simple tools.
*by C***. on October 9, 2016*

This was a direct replacement for the oxygen sensor on my 2007 Lexus RX350, Canadian built SUV. Note that this part is for bank 1, sensor 2. The sensor is located under the vehicle, aft (downstream) of the cat converter, in the exhaust pipe, closest to the driver's side. Denso (brand) are the same folks that supply many of original Lexus factory parts for this vehicle. It is a perfect match, right down to the wire length and clip fastener spacing! Easy to replace! Once under the vehicle it takes 20 minutes, including the time for the spray rust penetrant (Pb Blaster) to make removal a breeze. Tools you will need: - Jack and jack stands, unless you are skinny! NEVER go under a vehicle supported by a jack alone! - 7/8 open-end wrench (Save your money and don't buy the special oxygen sensor tool. I bought it and didn't use it) - Flat blade screwdriver to pry out clips securing cable. (Cable comes with new clips, so don't worry) - Eye protection. - Wire cutter (Optional, but snipping the old wires close to the sensor makes removal more pleasant) - Spray rust penetrater in a can. (I like Pb Blaster) - Vehicle computer code reader/reset tool (I own one, but many of the auto part chain stores will reset free of any charge) Normal thread (righty, tight - lefty, loose). Snug-up, but don't be a gorilla. 35 foot pounds, if you really want to put a torque wrench to it. Make sure the car is at ambient temperature. This is important for easy removal. The dealership quoted $400-$500 for this repair. I did for under $100. If you can change your tire, this is only slightly more difficult. No more check engine light or poor gas mileage. The part is working very well for me. I hope it does for you as well!

## Frequently Bought Together

- Denso 234-4509 Heated 4-Wire Oxygen Sensor with 25.5” Harness for 2004-2016 Lexus/Toyota V6 Right-Bank Downstream
- Denso 234-4168 Downstream Oxygen Sensor with 4-Wire 13.7” Harness
- Denso 234-9042 Air Fuel Ratio Sensor

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-28*