The part number 06L906031A refers to a fuel injector for certain Volkswagen Group vehicles, including models from Audi, Volkswagen, and Skoda. Below is a detailed introduction: Product: Fuel Injector (06L906031A) Compatible Models: Audi A3, A4, A5, Q5, and TT models equipped with the 2.0 TFSI engine. Volkswagen Golf, Passat, Tiguan, and Arteon with 2.0 TSI engines. Skoda Superb, Octavia, and other related models with the same engine configurations. - Fits engines from around 2013 and onwards, especially those equipped with the EA888 Gen 3 2.0-liter turbocharged engines. Function: - The fuel injector is a critical component of the fuel injection system. It is responsible for delivering a precise amount of fuel directly into the combustion chamber, ensuring efficient combustion and optimal engine performance. - It atomizes the fuel into a fine mist, which mixes with air for proper combustion, leading to better fuel efficiency, lower emissions, and improved power delivery. Material: - Constructed from high-quality metal and precision-engineered nozzles to withstand the high pressure and temperatures inside the engine. - The internal components are designed to be resistant to fuel corrosion and ensure long-lasting performance. Features: OE (Original Equipment) Quality: Manufactured to Volkswagen Group’s exact specifications for fitment, performance, and durability. This ensures a perfect match for the engine’s fuel injection system. High-Pressure Fuel Delivery: This injector is designed to work with high-pressure fuel systems, allowing for precise fuel metering, which is especially important in turbocharged engines for maximum power and efficiency. Low Emissions: Modern fuel injectors like this one are engineered to meet strict emission standards by providing the optimal air-fuel mixture, which reduces harmful emissions. Improved Fuel Efficiency: By delivering fuel in a finely atomized spray, the injector helps the engine burn fuel more efficiently, leading to improved mileage and performance. Symptoms of a Failing Fuel Injector: Rough Idle or Misfires: A clogged or malfunctioning injector can cause inconsistent fuel delivery, leading to misfires or a rough-running engine. Poor Fuel Efficiency: If the injector is not operating correctly, it may not provide the optimal fuel-to-air ratio, resulting in increased fuel consumption. Loss of Power: Inconsistent fuel supply can lead to reduced engine performance, especially under acceleration. Fuel Odor or Leaks: A damaged injector may leak fuel, leading to a noticeable fuel smell around the engine bay. Replacement Importance: - Replacing a faulty or worn fuel injector is essential for maintaining engine performance, fuel efficiency, and emission control. A malfunctioning injector can cause engine damage over time if not addressed promptly. This fuel injector is a key component in maintaining the performance and efficiency of 2.0 TFSI/TSI engines found in Volkswagen Group vehicles. Regular inspection and timely replacement help ensure smooth operation and extend the engine's lifespan.