NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor

NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor

Marsoni

M251S

$157.55

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

NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F 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. While conventional switching oxygen sensors only switch rich or lean, wideband oxygen (or Air Fuel Ratio) sensors produce a linear output signal that allows the ECU determine exactly how

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Easy and perfect fit for 2017 and 2018 Honda CRV with 1.5l engines. You need a Phillips screwdriver to remove the 4 screws holding the airbox. After that you just remove the old one and put the new one in the same orientation and put the screws back on. Helps the engine breathe which can result in slightly more power and mpg. I recommend changing every few years.

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Reviewed in the United States on August 8, 2025

mike R

Houston, US

★★★★★ 4

Looks identical to the OEM

Changed this filter in a matter of 3 -4 minutes. The fit and feel seems identical to the Honda OEM filter---feels just as heavy and fit exactly. For $10 it's a bargain. I drove about 20 miles after installing, also with no problems. 4 stars because I want to give a long term report... I will report a few months from now to advise how it held up under North East conditions.

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Reviewed in the United States on September 11, 2023

Verified Purchase

craigerino

Lake Worth, US

★★★★★ 5

3rd purchase very good!

Great filter. Easy install with a Phillips screwdriver. 5 min and an amateur can do it. This is my 3rd purchase and will save so much money vs dealer

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Reviewed in the United States on February 14, 2026

Verified Purchase

Chindee

Omaha, US

★★★★★ 5

Great price and perfect fit.

Fits perfectly in my 2017 Honda Cr-v.

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Reviewed in the United States on January 9, 2026