NewYall Upstream & Downstream Oxygen Sensor Kit for Toyota Sienna 3.3L V6 (2004-2006) | 4-Pack

Upgrade your Toyota Sienna's exhaust sensing with the NewYall Upstream and Downstream Oxygen Sensor Kit. This 4-piece set is tailored for the 3.3L V6 powertrain found in 2004–2006 Sienna models. The sensors are designed to deliver consistent electrical signals under typical driving conditions, supporting accurate diagnostics and maintained exhaust performance. The sturdy metal housings and rugged connectors are built to endure heat cycles and road vibrations, so you can rely on them during daily commutes, family trips, and longer journeys.

What’s included

• 2x Upstream oxygen sensors
• 2x Downstream oxygen sensors
• Quality fittings and mounting hardware for a clean, plug-in replacement

Design and fit you can trust

NewYall sensors mirror OEM-style connectors and probe depths for a straightforward replacement on the Sienna 3.3L. The four-piece kit provides full coverage for both upstream and downstream locations, simplifying the install and reducing downtime in the driveway or shop. Expect data that feeds into your vehicle’s onboard system and diagnostic tools with consistent electrical signals.

Potential benefits in practice

• Full coverage for upstream and downstream monitoring, improving diagnostic visibility
• Robust construction designed to withstand heat, vibration, and road conditions
• Plug-in design and common mounting points support quicker, cleaner installations
• May contribute to steadier engine readings and enhanced feedback during emissions checks

Real-world use cases

During routine service, replacing both upstream and downstream sensors refreshes the exhaust feedback loop. In everyday driving, drivers may notice steadier idle, more reliable sensor data during scans, and clearer signals during maintenance checks. Results will vary by vehicle condition and history.

Compatibility and quick-start tips

Specifically made for Toyota Sienna 3.3L GAS models from 2004 to 2006, this kit is designed for a direct fit. For best results, disconnect the battery before service, follow torque specs in your manual, and verify connector compatibility before install. If codes persist, seek professional help.