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NGK Audi A4 Quattro 2009 Direct Fit Oxygen Sensor

Marsoni M251S
Sale price$110.49
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NGK Audi A4 Quattro 2009 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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  • We offer a 30-day return/exchange service after receiving.
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4.0 ★★★★★
Based on 467 reviews
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Rick
Lake Worth, US
★★★★★ 5
2016 Acura Air Filter
Air filter for my 2016 Acura RDX fit great, installed it myself in one minute. Arrived at my house on time and in good condition, driver very courteous and respectful. Thank you very much Rick F.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
J
Verified Purchase
J
Carnegie, US
★★★★★ 5
Nice filter
Nice filter for acura rdx. Easy to install. Well priced.
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Reviewed in the United States on February 12, 2026
K
Verified Purchase
kevind
Lowell, US
★★★★★ 5
Perfect fit
Fit my car perfectly and good quality filter.
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Reviewed in the United States on March 1, 2026
J
Verified Purchase
J. Fleming
New York, US
★★★★★ 5
Satisfied with my purchase!
Well made, fit perfect and decent price.
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Reviewed in the United States on September 1, 2025
B
Verified Purchase
Burt st.brice
Louisville, US
★★★★★ 4
New
Looks great no issues with the product am happy with it
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Reviewed in the United States on August 3, 2025

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