★★★★★ 5
My car can breathe!
Style: Standard Air Filter
I have improved car preferences.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
NGK Audi A4 1999-1997 Direct Fit Oxygen Sensor
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
NGK Audi A4 1999-1997 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
Quick Dispatch:
Your NGK Audi A4 1999-1997 Direct Fit Oxygen Sensor orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.5 ★★★★★
Based on 757 reviews
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Product Reviews
★★★★★ 4
Fits fine
Style: Standard Air Filter
Item is a perfect fit. 2009 XB
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 24, 2026
★★★★★ 5
Quality air filter.
Color: 1Pc-CA10741
Appears to be of high quality, better than OEM. Good tight fit. Took less than 3 minutes to install in my 2010 Toyota Prius.
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Reviewed in the United States on May 12, 2026
★★★★★ 5
Abuse for many years with absolutely no disappointment. Worth the money!!
Color: 1Pc-CA11450
Fantastic filter that gets it's job done really well. Have you sees filters for years with absolutely zero problems or issues . I will continue to buy these Air Filters for my foreign made vehicles. Size was perfect easy installation good value for the money material isn't thin or cheaply made either. Definitely have enjoyed using these Motor Air and Cabin Air filters.
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Great filter!
Color: 1Pc-CA10755
Perfect fit in my 2024 Toyota Tacoma TRD Sport! My original one has 25,000 miles on it and honestly, wasn't that bad. But, I knew that if I didn't spend $20 and change it myself, the dealership guys would hound me everytime and try to sell me a $75 filter.
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Reviewed in the United States on May 12, 2026
