O2 Oxygen Sensor 234-4535 Downstream for Nissan and Infiniti

In this review the O2 Oxygen Sensor 234-4535 is evaluated as a direct downstream replacement for a range of Nissan and Infiniti V6 and L4 models. The bottom line: this sensor is for owners or mechanics who need a straightforward, durable downstream oxygen sensor to clear fault codes and restore proper fuel trim. It stands out because of its ceramic sensing element and high-temperature 310S stainless steel housing that promise long-term stability rather than bargain-basement short-term fixes.

Key Features

• Ceramic sensing element: provides precise and rapid oxygen concentration detection to help the engine control module maintain correct air-fuel ratios.
• Precious metal electrodes: improve response time and sensing accuracy, which can reduce rough idle and drivability issues tied to a failing sensor.
• 310S stainless steel housing: offers corrosion resistance for extended service life in high-temperature exhaust environments.
• Pre-applied anti-seize on threads: simplifies installation and reduces the risk of thread damage during removal or future replacement.
• Wide vehicle compatibility: fits many Nissan and Infiniti models from roughly 2011 to 2020 as the listed downstream unit, making it useful for garages working on multiple vehicles.

Who It's For

This sensor is aimed at do-it-yourself mechanics and professional technicians who need a direct-fit downstream replacement for applicable Nissan and Infiniti models, such as 370Z, Altima, Juke, Pathfinder, Murano and several Infiniti Q-series vehicles. It is a practical choice for anyone troubleshooting OBD-II oxygen sensor codes or seeking to restore fuel economy and reduce emissions without complicated modifications.

Those who should look elsewhere include owners of vehicles not listed in the compatibility notes and drivers who require an OEM-branded part for warranty or dealership service records. Also, if an upstream sensor or other exhaust components are the root cause, replacing only this downstream unit may not resolve all issues.

Pros & Cons

Pros

• Direct-fit design for many Nissan and Infiniti models makes installation straightforward for experienced DIYers and mechanics.
• Durable 310S stainless steel housing helps resist corrosion in harsh exhaust conditions.
• Pre-applied anti-seize on threads saves time and protects threads during installation and removal.
• Quality sensing materials contribute to faster and more accurate oxygen readings, which can improve fuel efficiency and emissions control.

Cons

• Compatibility is limited to the specific listed models and years; incorrect selection will require a return or exchange.
• As an aftermarket part, some buyers may prefer an OEM-branded sensor for dealer service records.

Specifications

Part Number	234-4535 (also replaces 234-4595, 250-241106, 24167)
Position	Downstream oxygen sensor
Compatible Vehicles	Selected Nissan and Infiniti models 2011-2020 (see compatibility list)
Sensing Element	Ceramic with precious metal-coated electrodes
Housing Material	High-temperature 310S stainless steel
Thread Treatment	Pre-applied anti-seize coating
Warranty	18 months unlimited mileage guarantee

Our Verdict

The O2 Oxygen Sensor 234-4535 is a reliable, value-oriented downstream replacement for compatible Nissan and Infiniti models. Its robust materials and pre-applied anti-seize make installation and long-term use straightforward, and it addresses common issues like fault codes and poor fuel trim. It represents good value for owners who need a solid aftermarket sensor and who confirm vehicle fitment before purchase.

Frequently Asked Questions

Will this sensor fit my vehicle?
Check the listed compatibility for specific model years and engine sizes; it fits many Nissan and Infiniti downstream positions but not every vehicle.

Does it come ready to install?
Yes, threads have a pre-applied anti-seize coating so it can be installed directly without adding lubricant to the threads.

What warranty support is provided?
The product includes an 18-month unlimited mileage guarantee and direct support from the seller for compatibility assistance or returns.