Discover Audi A4 Catalytic Converter prices & Audi A4 exhaust. Explore Audi A4 Catalytic Converter pipe. Find Audi A4 Catalytic Converter leak. Maintaining the catalytic converter of your Audi A4 is pivotal for ensuring peak performance and environmental compliance. Regular checks for any rattling noises, reduced acceleration, and a sulfur-like smell can alert you to potential failure, prompting timely replacement. To extend its lifespan, ensure proper engine maintenance to avoid excessive unburnt fuel that can overheat the converter. When selecting a new catalytic converter, choose between universal-fit or direct-fit options, with the latter providing a hassle-free installation tailored to your A4 model. Opt for high-quality materials to withstand high temperatures and corrosion. With the right choice, your Audi will run cleaner, meeting stringent emissions standards while maintaining efficient fuel economy.