---
product_id: 596634205
title: "O2 Oxygen Sensor Upstream Downstream Bank 1 & 2 SG272 234-4285 Fit 2002-2003 for Chevy Trailblazer EXT for GMC Envoy XL for Isuzu Ascender for Oldsmobile Bravada 4.2L V6 Engine Cylinder 2PCS"
brand: "qijiauto"
price: "VT12846"
currency: VUV
in_stock: true
reviews_count: 2
url: https://www.desertcart.vu/products/596634205-o2-oxygen-sensor-upstream-downstream-bank-1-and-2-sg272
store_origin: VU
region: Vanuatu
---

# Precise electrical signal output Direct OE fit for 4.2L V6 engines Plug-and-play installation O2 Oxygen Sensor Upstream Downstream Bank 1 & 2 SG272 234-4285 Fit 2002-2003 for Chevy Trailblazer EXT for GMC Envoy XL for Isuzu Ascender for Oldsmobile Bravada 4.2L V6 Engine Cylinder 2PCS

**Brand:** qijiauto
**Price:** VT12846
**Availability:** ✅ In Stock

## Summary

> 🚗 Tune your ride like a pro—breathe new life into your engine!

## Quick Answers

- **What is this?** O2 Oxygen Sensor Upstream Downstream Bank 1 & 2 SG272 234-4285 Fit 2002-2003 for Chevy Trailblazer EXT for GMC Envoy XL for Isuzu Ascender for Oldsmobile Bravada 4.2L V6 Engine Cylinder 2PCS by qijiauto
- **How much does it cost?** VT12846 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/596634205-o2-oxygen-sensor-upstream-downstream-bank-1-and-2-sg272)

## Best For

- qijiauto enthusiasts

## Why This Product

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

## Key Features

- • **Durable Build:** Crafted from stainless steel to withstand harsh engine conditions and ensure long-lasting reliability
- • **Complete Sensor Set:** Includes both upstream and downstream oxygen sensors for comprehensive engine monitoring
- • **Precision Performance:** Maintains optimal air-fuel ratio for smoother acceleration and improved fuel efficiency
- • **Seamless Compatibility:** Perfectly engineered for 2002-2003 Chevy Trailblazer, GMC Envoy, Isuzu Ascender & Oldsmobile Bravada 4.2L V6 engines
- • **Effortless Installation:** Direct plug-in design with factory-style connectors and step-by-step guide—get back on the road faster

## Overview

This premium O2 Oxygen Sensor set (Bank 1 & 2) is a direct replacement for 2002-2003 Chevy Trailblazer, GMC Envoy, Isuzu Ascender, and Oldsmobile Bravada 4.2L V6 engines. Manufactured to original equipment specs with durable stainless steel, it ensures precise air-fuel ratio readings to optimize engine performance and fuel efficiency. Featuring a plug-and-play design with factory-style connectors, installation is straightforward, making it the smart upgrade for maintaining smooth acceleration and reliable engine operation.

## Description

Full description not available

## Features

- FIT - Direct replacement for 2002-2003 for Chevy Trailblazer/EXT, for GMC Envoy/XL, for Isuzu Ascender & for Oldsmobile Bravada with 4.2L V6 engine. Includes Bank 1 & 2 sensors (Sensor 1 & 2)
- SUPERIOR QUALITY - Manufactured to match original equipment specifications with durable materials for precise air-fuel ratio readings. Compatible with part numbers 234-4285 and 234-4343
- ENGINE PERFORMANCE - Helps maintain proper engine operation by monitoring gas levels, which can support fuel efficiency and smooth acceleration
- SIMPLE INSTALL - Direct plug-in design with factory-style connectors. Includes step-by-step guide. Note: Recommend checking vehicle compatibility before purchase
- WHAT YOU GET - 2 oxygen sensors (Upstream & Downstream) with proper wiring connections. Use vehicle selector to confirm fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | QIJIAUTO |
| Item dimensions L x W x H | 11.42 x 2.56 x 1.77 inches |
| Material | Stainless Steel |
| Style | Modern |
| Mounting Type | Plug Mount |
| Output Type | electrical signal |
| Specific Uses For Product | automotive engine operation |
| Manufacturer | QIJIAUTO |
| Model | sensors |
| Item Weight | 0.317 ounces |
| Product Dimensions | 11.42 x 2.56 x 1.77 inches |
| Item model number | SG272 |
| Manufacturer Part Number | 831849-5434-1447143571 |

## Product Details

- **Brand:** QIJIAUTO
- **Item dimensions L x W x H:** 11.42 x 2.56 x 1.77 inches
- **Material:** Stainless Steel
- **Style:** Modern
- **Mounting Type:** Plug Mount

## Images

![O2 Oxygen Sensor Upstream Downstream Bank 1 & 2 SG272 234-4285 Fit 2002-2003 for Chevy Trailblazer EXT for GMC Envoy XL for Isuzu Ascender for Oldsmobile Bravada 4.2L V6 Engine Cylinder 2PCS - Image 1](https://m.media-amazon.com/images/I/61jd7wJg4qL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excelente
*by E***A on March 21, 2025*

Excelente entrega

### ⭐⭐⭐⭐ O2 sensor sensor
*by M***O on October 26, 2024*

It wasn't that bad. It worked I don't know for how long

## Frequently Bought Together

- QIJIAUTO 02 Sensor Oxygen Sensor SG272 234-4285 Sensor 1 Sensor 2 fit 2002-2003 for Chevy Trailblazer, 2002-2003 for Chevy Trailblazer EXT, 2002-2003 for GMC Envoy, 2002-2003 for GMC Envoy XL
- ENA Set of 6 Ignition Coil Pack Compatible with Chevy GMC Isuzu Hummer Saab Buick Trailblazer Envoy Rainer Colorado Canyon Ascender i-280 i-290 i-350 9-7x H3 2.8L 2.9L 3.5L 4.2L Replace# UF303 C1395
- ECOGARD XF55577 Premium Fuel Filter Fits Chevrolet Trailblazer 4.2L 2002-2004, Trailblazer EXT 4.2L 2002-2004, Trailblazer EXT 5.3L 2003-2004, SSR 5.3L 2003-2004

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**Shop now:** [https://www.desertcart.vu/products/596634205-o2-oxygen-sensor-upstream-downstream-bank-1-and-2-sg272](https://www.desertcart.vu/products/596634205-o2-oxygen-sensor-upstream-downstream-bank-1-and-2-sg272)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-10*