---
product_id: 322248232
title: "Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor"
brand: "denso"
price: "€ 358.97"
currency: EUR
in_stock: true
reviews_count: 5
category: "Denso"
url: https://www.desertcart.gr/products/322248232-denso-234-9051-right-bank-upstream-with-4-wire-8
store_origin: GR
region: Greece
---

# 12V max supply voltage Operates up to 600°C temperature Easy installation with anti-seize pre-coating Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor

**Brand:** denso
**Price:** € 358.97
**Availability:** ✅ In Stock

## Summary

> 🔥 Upgrade your ride’s brain with precision sensing ⚡

## Quick Answers

- **What is this?** Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor by denso
- **How much does it cost?** € 358.97 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/322248232-denso-234-9051-right-bank-upstream-with-4-wire-8)

## 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

- • **High-Heat Endurance:** Built to withstand extreme engine temps up to 600°C ensuring long-lasting performance.
- • **Plug & Play OEM Fit:** Direct replacement with pre-applied anti-seize and plastic thread protector for hassle-free install.
- • **Trusted Denso Quality:** OEM-grade sensor ranked #17 in Automotive Electrical Air & Fuel Ratio with 4.4-star rating from 500+ users.
- • **Precision Zirconium Sensor:** Engineered with zirconia solid electrolyte for ultra-accurate air-fuel ratio detection.
- • **Fuel Efficiency & Emissions Control:** Optimizes your engine’s air-fuel mix to reduce emissions and boost MPG.

## Overview

The Denso 234-9051 is a high-accuracy zirconium oxygen sensor designed for right-bank upstream placement. Operating at up to 600°C and powered by 12V, it ensures optimal air-fuel ratio detection to improve engine efficiency and reduce emissions. Featuring easy installation with anti-seize coating and a plastic thread protector, this OEM-quality sensor is a trusted, durable replacement favored by professionals and enthusiasts alike.

## Description

Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor

Review: Looks to be legitimate Denso OEM AFR Sensor, great price, perfect fit... - Not a whole lot to say as this looks like it is a legitimate Denso (OEM supplier) sensor. Based on the part number, this should have been a direct replacement for the sensor that had gone bad in my car, and it was. It was a little difficult taking the old one out due to the very limited space in the engine bay, but the install was relatively easy. Just be very careful not to touch the probe end or to bang it on anything, and be VERY careful not to cross-thread it. I was happy that it shipped with a plastic thread protector and the threads were pre-coated with anti-seize (a good thing, because I forgot to buy some beforehand, and once I took the old one out it was a little to late to run to the auto parts store and buy it). Overall, the replacement stopped the ECU from throwing the codes and causing the CEL. It also looks to be good OEM-like quality. I've put 500-600 miles on since the replacement and haven't had any issues. Let's hope this one lasts 14 years and 110,000 miles like the first one.
Review: Looks legit and works - Driver side upstream sensor went bad on my 07 gx470 so I managed to track down the part number and narrowed it down to this OEM part. Dealership wanted over $400 CAD for the part so there's massive savings to be had. Part came in a legit looking box and anti-seize pre applied. Car runs with no issues now so I highly recommend it!

## Features

- Manufactured to detect the amount of exhaust gas air fuel ratio.Material:Zirconium
- Constructed from durable material
- Features zirconia solid electrolyte
- Highly accurate; Thread Diameter: 18mm
- Easy installation

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0018JUJ9O |
| Best Sellers Rank | #125,574 in Automotive ( See Top 100 in Automotive ) #17 in Automitive Electrical Air & Fuel Ratio |
| Brand | Denso |
| Brand Name | Denso |
| Customer Reviews | 4.4 out of 5 stars 517 Reviews |
| Global Trade Identification Number | 00042511112889 |
| Included Components | Oxygen Sensor |
| Item Dimensions | 14.6 x 5.6 x 4.8 centimeters |
| Item Type Name | Oxygen Sensor |
| Item Weight | 0.25 Pounds |
| Item dimensions L x W x H | 14.6 x 5.6 x 4.8 centimeters |
| Item weight | 0.25 Pounds |
| Manufacturer | Denso |
| Material | Zirconium |
| Material Type | Zirconium |
| Maximum Supply Voltage | 12 Volts (DC) |
| Maximum supply voltage | 12 Volts (DC) |
| Measurement Accuracy | Highly accurate |
| Measuring Range | 10.0 - 20.0 |
| Model | 234-9051 |
| Mounting Type | Layered mounting |
| Output Type | electrical |
| Part Interchange Info | 234-9051 |
| Part Number | 234-9051 |
| Specific Uses For Product | Oxygen Sensor |
| Style | Modern |
| Style Name | Modern |
| UPC | 042511112889 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 600 Degrees Celsius |

## Product Details

- **Brand:** Denso
- **Item dimensions L x W x H:** 14.6 x 5.6 x 4.8 centimeters
- **Item weight:** 0.25 Pounds
- **Material:** Zirconium
- **Style:** Modern

## Images

![Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor - Image 1](https://m.media-amazon.com/images/I/71h6HzYy4HL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Looks to be legitimate Denso OEM AFR Sensor, great price, perfect fit...
*by C***P on 9 March 2022*

Not a whole lot to say as this looks like it is a legitimate Denso (OEM supplier) sensor. Based on the part number, this should have been a direct replacement for the sensor that had gone bad in my car, and it was. It was a little difficult taking the old one out due to the very limited space in the engine bay, but the install was relatively easy. Just be very careful not to touch the probe end or to bang it on anything, and be VERY careful not to cross-thread it. I was happy that it shipped with a plastic thread protector and the threads were pre-coated with anti-seize (a good thing, because I forgot to buy some beforehand, and once I took the old one out it was a little to late to run to the auto parts store and buy it). Overall, the replacement stopped the ECU from throwing the codes and causing the CEL. It also looks to be good OEM-like quality. I've put 500-600 miles on since the replacement and haven't had any issues. Let's hope this one lasts 14 years and 110,000 miles like the first one.

### ⭐⭐⭐⭐⭐ Looks legit and works
*by L***. on 5 July 2023*

Driver side upstream sensor went bad on my 07 gx470 so I managed to track down the part number and narrowed it down to this OEM part. Dealership wanted over $400 CAD for the part so there's massive savings to be had. Part came in a legit looking box and anti-seize pre applied. Car runs with no issues now so I highly recommend it!

### ⭐⭐⭐⭐⭐ O2 sensors are critical for the ECU to get the fuel/air ratio correct for the best combustion.
*by O***E on 4 November 2021*

I couldn't replace these myself, but when I took them to my mechanic he asked if they had connectors. He was pleased that he didn't have to do any wire splicing along with the chore of getting the old sensors out. Now I wasn't getting any engine codes from my old sensors, but they had over 500K miles on them so I figured it couldn't hurt to change them. Not only was I right in my assumption, I was shocked at the performance gain. I was afraid the engine was running rich, but it was actually running lean. And I didn't lose any MPG with the power gain, and it's still at the EPA rating for that vehicle. But it runs like a new truck again.

## Frequently Bought Together

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-06*