A-Premium Downstream O2 Oxygen Sensor Pair for Nissan & Suzuki V6 4.0L — Heated 4-Wire Threaded, Pack of 2

The A-Premium Downstream Left and Right O2 Oxygen Sensor pair is a direct-fit, heated replacement for the downstream oxygen sensors on select Nissan and Suzuki V6 4.0L models, supplied as two threaded, four-wire sensors with male connectors.

If your vehicle is showing check-engine codes related to downstream oxygen sensors or failing emissions tests, this A-Premium sensor set provides a budget-friendly way to restore accurate post-catalyst oxygen sensing. These sensors are designed to fit the downstream (rear) positions for compatible 2005–2012 Nissan Frontier, Pathfinder and Xterra models, several NV-series vans, and Suzuki Equator models from mid-2010 onward. They come as a boxed pair, each sensor heated and threaded for straightforward installation without special tools.

Which vehicles and sensor positions are covered by this A-Premium set?

These sensors are intended specifically for downstream (rear) positions, left and right, rather than upstream locations. Confirm the failed sensor's position in diagnostics before ordering to avoid buying the wrong sensor type. Fitment includes multiple Nissan V6 4.0L applications and Suzuki Equator when applicable.

• Frontier 2005–2012 V6 4.0L
• Pathfinder 2005–2012 V6 4.0L
• Xterra 2005–2012 V6 4.0L
• NV1500/NV2500/NV3500 2012–2021 V6 4.0L
• Suzuki Equator 2009–2012 V6 4.0L (from 07/2010)

How does the A-Premium downstream sensor compare to OEM units?

These A-Premium sensors are built to provide reliable oxygen sensing without the OEM price tag. They use a heated, four-wire design and threaded mounting to match factory electrical and mechanical interfaces for downstream use. While not OEM-branded, they are designed as direct replacements with common cross-reference numbers.

• Heated 4-wire configuration mirrors OEM electrical setup
• Threaded mounting for direct installation into exhaust pipe or flange
• Reference numbers: 250-24403, 250-24951, 1821382Z20, 226A0EA200, 226A08J010

What are the installation and performance details to expect?

Installation is intended to be simple: the sensors thread into the exhaust, connect to the factory harness via the male connector, and require no special calibration. The heated element speeds warm-up for quicker sensor operation after cold starts. Designed for durability, the sensors are packaged in a box and supplied as a pair so both downstream positions can be renewed at once.

• Wire quantity: 4 (heated sensor wiring)
• Connector gender: male, matches factory harness
• Package quantity: 2 sensors per box
• No special tools or programming required in most cases

What warranty and support come with this oxygen sensor set?

A-Premium backs this product with a 1-year unlimited-mileage warranty and customer support aimed at ensuring a positive purchase experience. The sensors are brand-new and shipped in retail packaging. If compatibility or performance concerns arise, consult the seller for guidance and warranty steps.

• 1-year unlimited-mileage warranty
• New, boxed parts for clean installation
• Customer support available through the A-Premium channel

Who is this for? This A-Premium downstream oxygen sensor pair is intended for DIY mechanics and professional technicians who need an economical, direct-replacement solution for downstream O2 faults on supported Nissan and Suzuki V6 4.0L vehicles. It’s best for buyers who have verified that downstream (left and right) sensors are the source of trouble codes and who want a boxed two-sensor kit that matches common OEM reference numbers and installs without special tools.