LABWORK 4Pcs Upstream&Downstream for 03-04 Infiniti G35 3.5L V6 O2 Oxygen Sensor

What is LABWORK 4Pcs Upstream&Downstream for 03-04 Infiniti G35 3.5L V6 O2 Oxygen Sensor?

The LABWORK 4Pcs Upstream&Downstream for 03-04 Infiniti G35 3.5L V6 O2 Oxygen Sensor is a complete set of four brand-new oxygen sensors designed specifically for 2003–2004 Infiniti G35 models equipped with the 3.5L V6 engine. These sensors serve both upstream (pre-catalytic converter) and downstream (post-converter) positions to ensure accurate air-fuel ratio monitoring and emissions control. Priced at $49.73, this cost-effective kit offers a reliable alternative to OEM parts while maintaining compatibility and performance. Each unit is built to meet exact fitment standards, helping drivers eliminate check engine lights, improve fuel economy, and protect the catalytic converter.

Key features

• Complete 4-Sensor Set — Includes two upstream and two downstream O2 sensors for full V6 engine coverage.
• Direct Fit Replacement — Engineered to match OEM specifications for 03–04 Infiniti G35 3.5L V6 without modifications.
• Improved Engine Performance — Helps restore optimal air-fuel balance for smoother operation and better fuel efficiency.
• Emissions Compliance — Ensures exhaust output meets environmental standards and passes emissions testing.
• 1-Year Limited Warranty — Backed by manufacturer warranty for quality assurance and buyer confidence.
• Plug-and-Play Installation — Retains factory connector configurations for straightforward replacement.
• New Condition — All four sensors are 100% brand new and ready for immediate installation.

Who is LABWORK 4Pcs Upstream&Downstream for 03-04 Infiniti G35 3.5L V6 O2 Oxygen Sensor for?

This oxygen sensor set is ideal for Infiniti G35 owners from 2003–2004 experiencing check engine lights, poor fuel economy, or failed emissions tests. It’s perfect for DIY mechanics with basic tools and intermediate knowledge of engine systems. Professional technicians will also appreciate the direct-fit design for fast, reliable replacements during service jobs. Whether maintaining daily drivers or restoring performance, this kit supports long-term engine health and compliance.

How does LABWORK 4Pcs Upstream&Downstream for 03-04 Infiniti G35 3.5L V6 O2 Oxygen Sensor compare?

Compared to standard aftermarket O2 sensors, the LABWORK 4Pcs kit offers a full set at a competitive price point, avoiding the need to buy sensors individually. Unlike universal sensors requiring splicing, these are application-specific with factory-match connectors, reducing installation errors. While not as expensive as OEM Nissan/Infiniti parts, they deliver comparable performance and fitment. When stacked against basic single-sensor replacements, this four-pack provides complete system coverage, making it a smarter long-term investment for comprehensive engine management.