Audi Fuel Tank Gas Cap - Genuine VW Audi 4B0201553B

Product Information

A fuel tank cap, or gas cap, is a component that seals the opening of the vehicle’s fuel tank to prevent fuel vapors from escaping and to maintain the pressure within the fuel system. It plays a role in preventing fuel contamination, maintaining emissions control, and ensuring fuel efficiency.

• Check Engine Light: One of the most common signs of a faulty or loose fuel tank cap is the Check Engine Light illuminating. Common fault codes are P0455 and P0457 with verbiage highlighting the evaporative emissions system.
• Evaporative Emission Control (EVAP) System Issues: A faulty gas cap can disrupt the vehicle’s evaporative emissions control system, leading to performance issues in the system, triggering error codes, and potentially resulting in emissions test failures.
• Fuel Smell Around or in the Vehicle: If the fuel tank cap is not sealing properly or is damaged, fuel vapors may escape, causing a noticeable gasoline smell around the vehicle, especially near the fuel filler area.

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.