New 4X Upper & Under Oxygen O2 Sensor for 2000 2001 Infiniti Nissan Maxima

What is New 4X Upper & Under Oxygen O2 Sensor for 2000 2001 Infiniti Nissan Maxima?

This complete set includes four oxygen sensors—two upstream and two downstream—designed specifically for 2000–2001 Infiniti and Nissan Maxima models. Engineered as a direct replacement for stock O2 sensors, it ensures accurate air-fuel ratio monitoring, helping maintain fuel efficiency, reduce emissions, and prevent check engine lights. Each unit is tested before shipment to guarantee reliability and proper signal response. Compatible with OEM part numbers 234-4777, 234-4776, 234-3109, and 234-3111, this kit simplifies replacement without requiring modifications.

Key features

• Complete 4-Sensor Set — Includes 2 upstream and 2 downstream O2 sensors for full exhaust system coverage.
• Direct OEM Replacement — Matches factory specifications for seamless installation on 2000–2001 Maxima models.
• Pre-Tested Units — Each sensor is functionally tested before shipping to ensure reliability.
• OEM Interchange Numbers — Compatible with 234-4777, 234-4776, 234-3109, 234-3111 for easy cross-referencing.
• Vehicle-Specific Fit — Designed exclusively for 2000–2001 Infiniti and Nissan Maxima applications.
• Improved Emissions Control — Helps restore factory-level exhaust gas monitoring and catalytic converter efficiency.
• Verified Compatibility Support — Lab Work Auto offers pre-purchase fit verification to ensure correct match.

Who is New 4X Upper & Under Oxygen O2 Sensor for 2000 2001 Infiniti Nissan Maxima for?

This product is ideal for Maxima owners and DIY mechanics maintaining or repairing 2000–2001 model year vehicles. It suits users needing to replace failed O2 sensors due to age, mileage, or check engine light codes. Mechanics performing emissions repairs or full sensor replacements will appreciate the complete set and verified compatibility. It's also valuable for those upgrading from faulty aftermarket sensors to reliable direct-fit replacements.

How does New 4X Upper & Under Oxygen O2 Sensor for 2000 2001 Infiniti Nissan Maxima compare?

Compared to single-sensor kits, this 4X set offers full-system coverage at a competitive per-unit cost. Unlike universal sensors requiring splicing, these are direct-fit with factory connectors, reducing installation time and error risk. While some premium brands offer lifetime warranties, this kit delivers tested performance at a budget-friendly price point. It outperforms untested generic sensors in reliability and fit, making it a smarter choice than piecemeal replacements or mismatched imports.