5EF857739QVZ Audi DOUBLE PRE

This part’s job is basically to help your catalytic converter work more efficiently, and to protect it. It takes some of the initial work of cleaning up exhaust gases before they even get to the main catalytic converter. It handles some of the tougher stuff right at the start, reducing harmful emissions. There are actually two of these working together—hence the “double” part—so it’s a robust system for handling exhaust cleanup. It’s located pretty early in your exhaust system, right after the exhaust manifold. Think of it as a first line of defense against pollution. It works alongside your oxygen sensors to make sure everything’s running cleanly. It’s designed to reduce hydrocarbons, carbon monoxide, and nitrogen oxides—the really nasty stuff in exhaust. Well, if this thing fails, your catalytic converter has to work much harder. The converter itself is expensive to replace, so keeping this precatalyst healthy protects that bigger investment. You’ll notice if it's failing because your check engine light will probably come on, and you might even smell a rotten egg smell from the exhaust. It also helps your car pass emissions tests, of course. A failing one can cause decreased fuel economy too. We carry a good selection of these at Fixparts Online, and we can check if this one fits your specific vehicle if you'd like. Customer support you can rely on: Double Precatalyst (MPN 5EF857739QVZ) has a 12-month warranty!

About Audi

Audi is a renowned German automobile manufacturer known for its innovative engineering, luxurious designs, and cutting-edge technology, delivering premium vehicles that blend performance and sophistication.

Why Choose Audi?

• Audi parts are made specifically for your vehicle, ensuring a perfect fit and optimal performance. • Using genuine Audi parts helps maintain your vehicle's value and original quality. • Audi parts are rigorously tested to meet high safety and durability standards, giving you peace of mind. • You’ll get reliable performance and keep your Audi running like new with parts designed by the original manufacturer. Drive with confidence – choose Audi parts at FixParts Online.