---
product_id: 18724666
title: "Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123)"
brand: "denso"
price: "1085 zł"
currency: PLN
in_stock: true
category: "Denso"
url: https://www.desertcart.pl/products/18724666-denso-234-9123-oxygen-sensor-air-and-fuel-ratio-sensor
store_origin: PL
region: Poland
---

# Optimizes fuel efficiency Withstands up to 800°C Precision OE fit & build Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123)

**Brand:** denso
**Price:** 1085 zł
**Availability:** ✅ In Stock

## Summary

> 🔥 Drive smarter, cleaner, and longer with Denso’s precision sensor!

## Quick Answers

- **What is this?** Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123) by denso
- **How much does it cost?** 1085 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/18724666-denso-234-9123-oxygen-sensor-air-and-fuel-ratio-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

- • **Eco-Friendly Drive:** Reduces emissions by maintaining optimal combustion balance.
- • **Durability That Lasts:** Constructed with stainless steel and zirconia for extreme heat resistance.
- • **Fuel-Savvy Performance:** Maximize every drop with precise air/fuel ratio mapping.
- • **Universal Compatibility:** Fits multiple Subaru and Saab models for versatile upgrades.
- • **Engineered for Exact Fit:** OE-standard design ensures first-time, hassle-free installation.

## Overview

The Denso 234-9123 Oxygen Sensor is a high-performance air/fuel ratio sensor designed for select Subaru and Saab models. Built to OE standards with durable stainless steel and zirconia materials, it ensures precise fuel mixture control, enhancing engine efficiency, reducing emissions, and extending catalytic converter life. Rated to withstand temperatures up to 800°C, this universal-fit sensor guarantees a reliable, first-time installation experience.

## Description

Denso part number 234-9123 is a replacement air/fuel ratio sensor for 2006 Saab 9-2X, 2006-2010 Subaru Forester, 2006-2011 Subaru Impreza, 2006-2009 Subaru Legacy, and 2006-2009 Subaru Outback vehicles.Denso Air/Fuel Ratio Sensors are manufactured and tested to the strictest OE standards for unparalleled performance. Each component is precision-built for exact replacement, and a first time fit. The superior design of Denso Air/Fuel Ratio Sensors maximizes engine performance and fuel efficiency while reducing fuel consumption and harmful emissions. Denso Air/Fuel Ratio Sensors increase performance by mapping air/fuel ratios throughout the RPM range. They also reduce emissions by keeping the air-fuel mixture at an optimum ratio. Optimal air/fuel ratios reduce fuel consumption and maximize catalytic converter life. Denso gives you the right part and the right fit, the first time..

## Features

- Efficient Fuel Consumption
- Constructed from durable material
- Features zirconia solid electrolyte
- Manufactured to detect the amount of exhaust gas air fuel ratio
- Fit type: Universal Fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001F7EK44 |
| Best Sellers Rank | #294,408 in Automotive ( See Top 100 in Automotive ) #1,140 in Automotive Replacement Oxygen Sensors |
| Brand Name | Denso |
| Customer Reviews | 4.6 4.6 out of 5 stars (523) |
| Global Trade Identification Number | 00042511115347 |
| Included Components | Air/Fuel Ratio Sensor |
| Item Dimensions | 5.75 x 2.19 x 1.88 inches |
| Item Type Name | Oxygen Sensor |
| Item Weight | 4 ounces |
| Manufacturer | DENSO |
| Material Type | Stainless Steel, Zirconium |
| Model | 234-9123 |
| Mounting Type | Threaded Mount |
| Number of Items | 1 |
| Output Type | NPN |
| Part Number | 234-9123 |
| Specific Uses For Product | Replacement Air/Fuel Ratio Sensor |
| Style Name | Replacement Part |
| UPC | 042511115347 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 800 °C |
| Warranty Description | Manufacturer Warranty |

## Product Details

- **Brand:** Denso
- **Item Weight:** 4 ounces
- **Item dimensions L x W x H:** 5.75 x 2.19 x 1.88 inches
- **Material:** Stainless Steel, Zirconium
- **Style:** Replacement Part

## Images

![Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123) - Image 1](https://m.media-amazon.com/images/I/318JGqbTPmL.jpg)
![Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123) - Image 2](https://m.media-amazon.com/images/I/31j8SA9AgDL.jpg)
![Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123) - Image 3](https://m.media-amazon.com/images/I/31NdXUO0lEL.jpg)
![Denso 234-9123 Oxygen Sensor (Air And Fuel Ratio Sensor), Regular (2349123) - Image 4](https://m.media-amazon.com/images/I/51ycWL8hDuL.jpg)

## Questions & Answers

**Q: Is this compatible to the subaru oem part # 22641aa36a?**
A: I don't know how this part relates to any Subaru part numbers.
I installed this on a 2007 Outback with a 2.5 L SOHC engine; the engine has run fine since installation and the MIL has not lit.
As I stated in my review, the plug end was different than the original part, so I had to splice the original plug onto this sensor.
I checked and double-checked the part number, and this one comes up as the correct part, so perhaps my car was built with an oddball plug.
If your car has the same plug as mine and you don't want to splice it, it may be worthwhile for you to get a sensor from Subaru.

**Q: Anyone know where i can get an extension for this o2 sensor: denso 234-9123 oxygen sensor**
A: Spark plug anti-foul extenders are sometimes used as downstream O2 sensor extenders to "fix" PO420 codes, and are available here and in parts stores. 

The thread size and pitch, for this application should be M18 X 1.5. You need to drill out the end. 

This trick can work for downstream sensors on some vehicles, but I doubt it will work for upstream sensors. It may cause error codes and also cause the engine to run poorly because the sensor will receive inaccurate information about the oxygen concentration in the exhaust and thereby cause the fuel air mix to deviate from the correct stoichiometric ratio.

I'm just a home mechanic, so take my words with an appropriate sized grain of salt, but that is what makes sense to me based on my knowledge. If the upstream sensor is bad it should be replaced. If the sensor is good but the problem is with the engine, it is best to address the root cause of the problem.

**Q: Camshift actuator sensor location**
A: What kind of car?   Usually located on head near the back of camshaft.

**Q: I got a P0172 code ( system too rich bank 1) on my 2009 subaru impreza anesis 1.5L what is the problem ?**
A: Engine running too rich could come from many things, so if you have the knowledge, tools and time it is better to address the problem methodically rather than buying parts and hoping for the best. It could be a leaky vacuum hose, dirty throttle throttle body, dirty IACV (if the car has it), bad MAP sensor, leaky exhaust system, worn spark plugs, bad oxygen sensor, perhaps even misfire from a bad coil. In my opinion the oxygen sensor is not high on the list, and is among the more expensive possible culprits. If you don't want to or can't do the troubleshooting, it may be best to take the car to a competent mechanic.

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-08-21*