NGK Infiniti QX4 2001 Direct Fit Oxygen Sensor

NGK Infiniti QX4 2001 Direct Fit Oxygen Sensor

Marsoni

M251S

$126.53

Get it in 3 business days with 1 day shipping. Friday, May 29

NGK Infiniti QX4 2001 Direct Fit Oxygen SensorNTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic

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The K&N filter is a big step up from the standard Toyota air filters and OEM replacements. Installation was quick and easy, and the fit is perfect. I’ve noticed smoother airflow and better throttle response compared to the stock filter. The best part is that it’s washable and reusable, so it’s a long-term investment instead of constantly buying replacements. Definitely a smarter choice for anyone who wants performance and value over the typical paper filters.

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Reviewed in the United States on August 25, 2025

Verified Purchase

Amazon Customer

Dallas, US

★★★★★ 5

Fits 2024 Land Cruiser 1958

Size: 1" x 1" x 1"

Easy to install. Perfect fit.

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Reviewed in the United States on May 3, 2026

Verified Purchase

Lexington, US

★★★★★ 5

Does the job, economical and a perfect fit

Size: 1" x 1" x 1"

Bought exactly 1 year ago for 3rd Gen Tundra. So far, it really does the job. At first I didn’t realize how awesome it was until I had to remove and clean it yesterday. Although I keep my truck immaculate inside and out, after 1 years use, the filter had become extremely filthy and the air had an old mildew, vomit, stank smell. When clean and set for fresh air, I can only faintly notice diesel exhaust smells from those in front of me. I also notice little to no dust accumulation on my dash and flat surfaces. In my opinion the K&N cabin filter kit is an essential tool for cleaning this filter. K&N made the filter, so I would imagine that they know how to clean and refresh it properly. By the way, refresh solution is nearly fragrance free. I bought the refresh kit at a big box auto supply and it came in a mostly black box instead of the white box as sold on here. Don’t know if that means the formulation has changed or not.

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Reviewed in the United States on March 2, 2025

Verified Purchase

Blake

Carnegie, US

★★★★★ 5

Like A Glove

Size: 1" x 1" x 1"

Perfect fit for ‘26 Tundra.

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Reviewed in the United States on May 22, 2026