Volkswagen Nitrogen Oxide (NOx) Sensor - Genuine Volkswagen 4G0906261C

Product Information

A NOx (Nitrogen Oxide) sensor monitors the amount of nitrogen oxides (NOx) in a vehicle's exhaust to help the engine control module (ECM) optimize combustion and emissions systems, including EGR and SCR/DEF operation on diesel vehicles. By providing real-time exhaust data, it helps reduce harmful emissions, maintain fuel efficiency, and ensure the vehicle meets emissions standards.

• Check Engine Light (CEL) illuminated
• Reduced engine performance or limp mode
• Increased fuel consumption
• Failed emissions inspection
• DEF system warnings or excessive DEF consumption (diesel)
• SCR catalyst efficiency faults
• Rough idle or hesitation (less common)
• Stored NOx sensor diagnostic trouble codes (DTCs)

About Genuine VW Audi

The Volkswagen Group, also known as “VAG”, consists of Volkswagen, Audi, Lamborghini, Bentley, Bugatti, Porsche, Ducati, MAN, Scania, SEAT, and Skoda. The original parts used by VAG to build your car are available as replacement parts under the “Genuine VAG” brand. Manufactured under the direction of VAG, expect excellent quality and a premium price since these parts are available exclusively through the VAG Dealership network.

You may not realize this, but the parts that make up your VAG are not necessarily manufactured by VAG. No cause for concern, as VAG designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for VAG for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine VAG parts box and find an OEM branded part inside, simply with the addition of a VAG logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.