A-Premium Downstream Heated O2 Oxygen Sensor for Nissan & Infiniti — 4-Wire Threaded Direct-Fit

The A-Premium downstream heated oxygen (O2) sensor is a direct-fit replacement that restores accurate exhaust oxygen readings for compatible Nissan and Infiniti V6 and select L4 engines.

This downstream oxygen sensor monitors exhaust gases after the catalytic converter and feeds crucial information to the engine control system. Designed as a threaded, heated, four-wire sensor, it matches factory electrical connections and mounting for many Nissan and Infiniti applications. Before ordering, confirm fitment using your vehicle details; part cross-reference numbers are provided to help match the correct unit.

Which specific vehicles is this A-Premium downstream O2 sensor compatible with?

This sensor fits a range of Nissan and Infiniti models across model years, especially V6 3.7L and 3.5L vehicles and certain 4-cylinder variants. Compatibility varies by bank and mounting location (left/right, front/rear), so verify which downstream position your vehicle requires.

• Infiniti Q40 (2015, V6 3.7L), Q50/Q60 (2014–2015, V6 3.7L), Q70/Q70L (2014–2019, V6 3.7L)
• Infiniti JX35 (2013, V6 3.5L), QX60 (2014, V6 3.5L)
• Nissan 370Z (2014–2020, V6 3.7L), Altima (2013–2018 L4 2.5L and 2013–2014 V6 3.5L variations)
• Nissan Juke, Murano, Pathfinder, Quest and QX70 where specified by year and engine

How do I confirm this sensor is the right part for my car?

Always cross-check fitment before purchase to avoid returns. Use the vehicle lookup feature on the retailer site and compare the sensor’s reference numbers with your vehicle’s OEM data.

• Use the seller’s “confirmed fit” or vehicle compatibility tool
• Compare reference numbers: 250-241106, 234-4535, 250241106, 2344535, 24167, 226A01KC0A
• Verify the downstream position required (LH/RH, front/rear) for your model

What are the technical specifications and installation details?

The unit is a heated, threaded oxygen sensor with a female connector and four wires, supplied as a single boxed sensor. It installs into the exhaust pipe or housing where the downstream sensor is required and connects to the factory harness without splicing in most cases.

• Wire quantity: 4 (heated sensor design)
• Mounting: threaded — matches OE mounting points
• Connector: female — designed for direct plug-in to factory harness
• Package: one oxygen sensor supplied per box

What should I expect after replacing the downstream O2 sensor?

Replacing a faulty downstream sensor helps restore accurate exhaust monitoring and can clear related engine codes when the new sensor meets vehicle requirements. It’s not a guaranteed fix for all exhaust or emissions issues but returns the sensor readings to expected ranges when installed correctly.

• Resolves inaccurate downstream oxygen readings when the sensor is the issue
• Plug-and-play connection for compatible models minimizes installation time
• Heated element helps ensure proper operation across temperatures

Who is this for: This A-Premium downstream oxygen sensor is intended for vehicle owners, mechanics, and fleet technicians who need a reliable, direct-fit replacement for Nissan and Infiniti models listed above. It suits anyone comfortable verifying fitment and performing basic exhaust-sensor replacement or working with a professional installer to restore correct exhaust-sensing performance.