Downstream O2 Oxygen Sensor 89465-48180/234-4509 - Reliable Catalytic Converter Monitor for Toyota & Lexus

Is your vehicle plagued by a persistent check engine light, rising fuel costs, or failed emissions tests? Our downstream oxygen sensor—engineered with OE numbers 89465-48180 and 234-4509—is the perfect solution. 100% brand new, and backed by a 3-year warranty, it ensures your vehicle’s catalytic converter operates efficiently while restoring performance and saving you money.

🔍 Exact Fitment & Position Guide

For Lexus Models
- RX330: 3.3L V6 | 2004-2006 (Downstream Right)
- RX350: 3.5L V6 | 2007-2014 (Downstream Right)
- RX450H: 3.5L V6 ELECTRIC/GAS | 2010-2013 (Downstream Right)

For Toyota Models
- Highlander: 2.7L L4 | 2009-2013 (Downstream)
- Highlander: 3.3L V6 | 2004-2007 (Downstream Right)
- Highlander: 3.5L V6 | 2008-2013 (Downstream Right)
- Highlander: 3.5L V6 ELECTRIC/GAS | 2011-2013 (Downstream Left)

📦 Package Contents

1 x Downstream (Rear) Oxygen Sensor (OE: 89465-48180 / 234-4509)

✅ Core Product Specifications

- OE/OEM Part Numbers: 89465-48180, 234-4509

- Type: Downstream Oxygen Sensor

- Condition: 100% Brand New

- Replacement Type: Direct Plug-In Replacement (No wiring modifications needed)

- Quality Assurance: 100% tested before shipment to ensure accuracy

- Fitment Type: Direct Replacement (Matches OE dimensions)

- Application: Catalytic converter efficiency monitoring

🔧 Critical Function of This Sensor

As a rear (downstream) oxygen sensor, its primary role is to detect whether the three-way catalytic converter works normally. By analyzing exhaust gas composition after it passes through the converter, it sends real-time data to the ECU (Engine Control Unit). This ensures the converter effectively reduces pollutants and alerts you to potential failures before they lead to costly repairs.

🌟 Key Benefits for Your Vehicle

- Reduce Harmful Emissions: Optimizes exhaust treatment to meet environmental standards—guarantees smoother smog test results.

- Boost Fuel Economy: Supports the ECU in maintaining an optimal air-fuel mixture, cutting unnecessary fuel consumption by up to 15%.

- Enhance Engine Performance: Eliminates rough idling, hesitation, and poor throttle response caused by faulty catalytic converter feedback.

- Protect Catalytic Converter: Early detection of inefficiencies prevents premature converter failure (saves $800+ in replacement costs).

- Easy Installation: Plug-and-play design fits your vehicle’s original connector—install with basic hand tools in 20 minutes.

⚠️ Important Buying Reminder

To avoid compatibility issues, please verify three details before purchasing:

1. Your vehicle’s year, make, model, and engine displacement match the fitment list.

2. The OE number (89465-48180 or 234-4509) matches your old sensor’s part number.

3. The product picture aligns with your stock sensor (check connector shape and wiring).

If you’re unsure, send us your VIN—we’ll confirm compatibility for free!

🤝 Customer Support You Can Trust

We stand behind our products with dedicated support:

- Warranty Coverage: 3-year protection against manufacturing defects—we replace or refund if issues arise.

- Transparent Service: Contact us first before leaving feedback—we resolve problems fast.

✅ Why Choose This Sensor Over Others?

Generic sensors often fail prematurely or misread data. Ours is built to OE standards with heat-resistant materials, ensuring accuracy even in extreme exhaust temperatures. The 3-year warranty and 100% pre-shipment testing mean you’re investing in reliability—not just a replacement part.

Restore your vehicle performance and protect its catalytic converter. Add the 89465-48180/234-4509 downstream oxygen sensor to your cart today!