AZHZ Oxygen Sensor Replacement for Hyundai Accent/Elantra — Upstream & Downstream Heated 234-4851

Overview

Meet the AZHZ 234-4851 Oxygen Sensor kit, designed to fit Hyundai Accent (2000–2011), Elantra (2001–2012), Tiburon (2003–2008), Tucson (2005–2009), and select Kia models. This kit includes both upstream and downstream heated sensors, engineered to monitor exhaust conditions with reliable performance across typical driving scenarios.

Oxygen sensors help the engine management system gauge the air–fuel mix. When a sensor wears, the computer may struggle to balance fuel delivery, affecting throttle response and, potentially, fuel economy. The built-in heater helps reach optimal temperature faster, which can support smoother running and more consistent readings during cold starts.

Key features

• Vehicle fitment: Upstream and downstream heated O2 sensors compatible with Hyundai Accent (2000–2011), Elantra (2001–2012), Tiburon (2003–2008), Tucson (2005–2009), and Kia Rio/Soul/Spectra/Sportage.
• Specification: Upstream and Downstream positions; heated type; 380mm wire length.
• Quality and durability: High-heat welded seals for stronger sealing; built-in heater accelerates warm-up; designed for reliable operation under varied temps.

Installation and maintenance

• Direct replacement with precoated threads for convenient fit and proper torque.
• Replacing a damaged O2 sensor supports consistent monitoring of oxygen concentration in exhaust gas, contributing to performance and environmental protection.

Real-world use scenarios

In daily driving, the kit can help restore steady idle, brisk acceleration, and smoother transitions between fuel maps. On highway runs, consistent sensor readings can assist the ECU in maintaining efficient fuel use, especially after a cold start.

Fitment note

Before installation, compare the part image to ensure the plug matches exactly. An identical connector is essential for proper fitment and electrical connection.