NGK Audi A6 2009-2006 Direct Fit Oxygen Sensor

NGK Audi A6 2009-2006 Direct Fit Oxygen Sensor

Marsoni

M251S

$116.37

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

NGK Audi A6 2009-2006 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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I had high hopes for this, but sadly, it fell short. I have to wear a CPAP mask at night & the dry mouth is just one of the things I hate about it. I saw this, read the reviews & decided to give it a try. I used it per the directions, but it really did nothing to alleviate the dry mouth. I'm giving it 2 stars because it doesn't taste bad, but that's the only good thing I can say about this.

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Reviewed in the United States on February 9, 2026