---
product_id: 52499800
title: "GM Genuine Parts 12661898 Heated Oxygen Sensor"
brand: "gm genuine parts"
price: "€ 126.14"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.gr/products/52499800-gm-genuine-parts-12661898-heated-oxygen-sensor
store_origin: GR
region: Greece
---

# ±1% measurement accuracy Heated sensor for fast response OEM-spec fit & function GM Genuine Parts 12661898 Heated Oxygen Sensor

**Brand:** gm genuine parts
**Price:** € 126.14
**Availability:** ✅ In Stock

## Summary

> 🔥 Drive smarter, cleaner, and faster with GM’s precision oxygen sensor!

## Quick Answers

- **What is this?** GM Genuine Parts 12661898 Heated Oxygen Sensor by gm genuine parts
- **How much does it cost?** € 126.14 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/52499800-gm-genuine-parts-12661898-heated-oxygen-sensor)

## Best For

- gm genuine parts enthusiasts

## Why This Product

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

## Key Features

- • **Precision Engine Tuning:** Optimizes air/fuel ratio to 14.7:1 for peak performance and fuel economy
- • **Rapid Warm-Up Technology:** Heated sensor design delivers quick, accurate readings even in cold starts
- • **Durability Under Pressure:** Operates flawlessly up to 800°F, built to last in extreme exhaust conditions
- • **Plug-and-Play Installation:** Flange mount design guarantees exact fit and hassle-free replacement
- • **GM-Recommended Authenticity:** Factory-validated replacement ensuring perfect compatibility and reliability

## Overview

The GM Genuine Parts 12661898 Heated Oxygen Sensor is a factory-recommended, OE-spec sensor engineered to precisely measure oxygen levels in exhaust gases. Its heated design ensures rapid sensor activation for optimal engine tuning, improving fuel efficiency and reducing emissions. Built to withstand temperatures up to 800°F, this sensor guarantees durability and a perfect fit for GM vehicles, backed by a 24-month unlimited mile warranty.

## Description

GM Genuine Parts Oxygen (O2) Sensors are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These sensors are special feedback sensors on your vehicle's exhaust system and measure the proportion of oxygen in exhaust gases. Using this measurement, the engine control module (ECM) can adjust the air/fuel ratio to near the optimal value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE).

Review: Finally eliminated my Check Engine light - Solved my downstream cold air exhaust issue on start up.
Review: Perfect fit - Exact replacement for the original part. No more trouble code, satisfied.

## Features

- Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
- GM-recommended replacement part for your GM vehicle’s original factory component
- Offering the quality, reliability, and durability of GM OE
- Manufactured to GM OE specification for fit, form, and function

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01E6FMZ2K |
| Best Sellers Rank | #553,673 in Automotive ( See Top 100 in Automotive ) #2,946 in Automotive Replacement Oxygen Sensors |
| Brand Name | GM GENUINE PARTS |
| Customer Reviews | 4.4 4.4 out of 5 stars (159) |
| Global Trade Identification Number | 00808709410607 |
| Included Components | Heated Oxygen Sensor |
| Item Dimensions | 18 x 1.5 x 1.1 inches |
| Item Type Name | Heated Oxygen Sensor |
| Item Weight | 0.21 Pounds |
| Manufacturer | ACDelco |
| Measurement Accuracy | ±1% |
| Measuring Range | 0% - 20% |
| Model | 12643903 |
| Mounting Type | Flange Mount |
| Output Type | electrical signal |
| Part Number | 12661898 |
| Sensing Distance | 2 Inches |
| Specific Uses For Product | Oxygen Sensor |
| Style Name | Modern |
| UPC | 808709410607 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 800 Degrees Fahrenheit |
| Warranty Description | 24 Month / Unlimited Mile Limited Warranty on parts sold on or after 04/01/18. (Parts Only) Please see ACDelco.com for more details. |

## Product Details

- **Brand:** GM GENUINE PARTS
- **Item Weight:** 0.21 Pounds
- **Item dimensions L x W x H:** 18 x 1.5 x 1.1 inches
- **Measurement Accuracy:** ±1%
- **Style:** Modern

## Images

![GM Genuine Parts 12661898 Heated Oxygen Sensor - Image 1](https://m.media-amazon.com/images/I/41sEf2IJGGL.jpg)
![GM Genuine Parts 12661898 Heated Oxygen Sensor - Image 2](https://m.media-amazon.com/images/I/41WgKx+L9XL.jpg)
![GM Genuine Parts 12661898 Heated Oxygen Sensor - Image 3](https://m.media-amazon.com/images/I/41q8D5ZQ6UL.jpg)

## Questions & Answers

**Q: What are the symptoms of a bad O2 sensor?**
A: A failing or failed O2 sensor may not detect the engine’s air-fuel ratio running too rich or too lean. Common signs include an illuminated check engine light, poor fuel economy, rough idling or failed emissions testing.

**Q: Can a bad O2 sensor cause the check engine light to come on?**
A: Yes. When incorrect oxygen levels are detected in the exhaust, the sensor will trigger the sensor to send a fault code and turn on the check engine light.

**Q: Will replacing an O2 sensor improve gas mileage?**
A: A properly functioning O2 sensor can help the vehicle maintain the optimal air-fuel ratio for combustion, helping balance fuel economy, engine performance and emissions.

**Q: How long do O2 sensors last?**
A: O2 sensors can last between 60,000 and 100,000 miles. However, O2 sensor longevity depends on numerous factors including heat, carbon buildup and normal wear.

**Q: Why choose GM Genuine Parts O2 sensors instead of aftermarket brands?**
A: GM Genuine Parts O2 sensors are engineered to original equipment specifications for precise fit, form and function. They are designed to integrate seamlessly with your vehicle’s engine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Finally eliminated my Check Engine light
*by S***. on January 23, 2026*

Solved my downstream cold air exhaust issue on start up.

### ⭐⭐⭐⭐⭐ Perfect fit
*by M***E on July 26, 2024*

Exact replacement for the original part. No more trouble code, satisfied.

### ⭐⭐⭐⭐⭐ Worked well
*by G***C on December 2, 2024*

Had to get an original gm part because off brands don’t work. It worked well for the price. Used it for a 2013 Malibu

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-06-25*