NGK Audi A8 Quattro 2007-2005 Direct Fit 5-Wire Wideband A/F Sensor

NGK Audi A8 Quattro 2007-2005 Direct Fit 5-Wire Wideband A/F Sensor

Marsoni

M251S

$128.96

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

NGK Audi A8 Quattro 2007-2005 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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This stuff is flat out amazing for 2 cycle small engines, works like advertised. 4 cycle isn't as good, if your engine hasn't ran in years, you'll still have to clean the carb, but it does help some. The 2 cycle oil for one is a lubricant and inhibits varnish buildup (especially a synthetic premium brand), and usually premium oil has a fuel stabilizer in it. Plus if you don't have a float bowl, there's not enough fuel for phase separation. I also use it in my mix for my ultrasonic cleaner when cleaning carbs. Overall a very good product, but understand it's limitations in this modern age of ethanal fuel.

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Reviewed in the United States on April 12, 2026

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G123

Fort Morgan, US

★★★★★ 5

It works well.

Size: 8 Fl Oz (Pack of 1)

Great product that delivers on what it says it does. This won’t fix a mechanical problem or damaged component, but it will fix a stuck float, varnished tank, gummed up jet, or partially blocked emulsion tube.

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Reviewed in the United States on May 14, 2026

Verified Purchase

R Duke, Texas

Omaha, US

★★★★★ 5

It Works

Size: 8 Fl Oz (Pack of 2)

This stuff works. I added it to my four 5 gallon gas cans before filling them up. I’ve used 10 gallons of gas in my lawn tractor so far and can tell it likes it. I do annual maintenance before summer and check or change the spark plug so it performs the best it can. I have 508 hours on it and with this it seems like it idols smoother, which indicates it has helped in the carburetor since I haven’t had to remove it and clean it. Works great.

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Reviewed in the United States on April 30, 2026

Verified Purchase

Dennis

Birmingham, US

★★★★★ 5

Great product

Size: 4 Fl Oz (Pack of 1)

Used this stabil in my rider after first start of the season. Machine running rough and uneven. Drained old fuel and added it. Within 15 minutes at full throttle it began to run normal. No back fires and engine back to normal. There will always be a bottle of this in my garage.

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Reviewed in the United States on May 13, 2026