BLPextrm Oxygen O2 Upstream Sensor for Nissan Altima/Maxima 2015-2018 - Fast Response, Direct-Fit

This upstream oxygen sensor from BLPextrm is built as a direct replacement for a wide range of Nissan and Infiniti models, offering a faster response and durable construction designed to tolerate high exhaust temperatures. It reads exhaust oxygen content and feeds that data to the engine control unit so the ECU can adjust fuel delivery and ignition timing for smoother running. Before purchasing, verify your vehicle year, model, and part number against the listed compatible replacements to ensure proper fitment.

Which Nissan and Infiniti models will this upstream O2 sensor fit?

This sensor covers many popular mid‑2010s Nissan and Infiniti vehicles where the upstream (pre‑catalytic) sensor is required. Fitment includes Altima, Maxima, Rogue, Pathfinder and several Nissan trucks plus multiple Infiniti sedans and SUVs—confirm compatibility by matching your vehicle year and OEM part numbers listed.

• Compatible with Altima (2015–2018), Maxima (2016–2018), Rogue (2017–2018), Pathfinder (2015–2018)
• Also fits 370Z, Frontier, Murano, Armada, Titan, Xterra and NV-series where specified
• Infiniti Q40/Q60, Q50/Q70, QX50/QX60/QX70/QX80 coverage for listed years
• Cross-references: 234-9148, 22693-1PM0A, 22693-9HP0A, 21150-07610 and equivalent part numbers

How does this upstream sensor affect engine performance?

The upstream oxygen sensor provides the engine control unit with real-time oxygen readings from the exhaust, which helps the ECU fine-tune fuel trim and combustion. A functioning sensor supports steadier idle, more consistent acceleration response, and can reduce instances of rough running associated with a failing O2 sensor. It does not alter engine tuning beyond restoring proper closed-loop control.

• Improves fuel-air ratio feedback to the ECU for balanced combustion
• Helps correct unstable idle and hesitation related to poor sensor data
• Enables the vehicle to run in closed-loop mode for optimal emissions control

What are the construction and durability features of this sensor?

BLPextrm designs this O2 sensor from selected high-temperature materials capable of withstanding exhaust heat up to around 650°C, helping maintain accurate readings over time. The sensing element and protective sheath are optimized for quick response to changing oxygen levels, which shortens correction times after load or throttle changes. Wiring and connectors are made to meet automotive-grade standards for secure installation and long-term reliability.

• High-temperature rated materials for prolonged lifespan
• Fast response sensing element for quicker ECU corrections
• Automotive-grade wiring and connector for a secure fit

How should I verify fitment and install this upstream O2 sensor?

Always check your vehicle’s year, engine code and OEM part number against the cross-reference list before ordering. Installation requires basic hand tools and safe access to the exhaust manifold area—use an O2 sensor socket if possible, and observe torque and thread-sealing recommendations from your vehicle manufacturer. If unfamiliar with exhaust components, consult a qualified mechanic to avoid damage or improper installation.

• Compare vehicle year/model and part numbers (listed cross-references) before purchase
• Use proper O2 sensor socket and follow OEM torque specs during install
• Seek professional installation when unsure about exhaust system work

Who is this for: This BLPextrm upstream oxygen sensor is intended for owners and technicians restoring proper air-fuel monitoring on compatible Nissan and Infiniti vehicles from the 2014–2019 era. It suits DIY mechanics who can perform exhaust-side sensor replacement as well as service shops that need a cost-effective direct-fit replacement part. Make sure your vehicle’s part number matches one of the listed cross-references for correct application.