4D0399109A Audi STOP

This part basically prevents unwanted movement inside the gearbox. Think of it like a little internal brace. It’s a small, but precise component designed to limit how far certain gears can travel, and to keep everything aligned correctly. It doesn’t make anything move, it just keeps things from moving too much or in the wrong direction. It's usually a pin, a bushing, or a small, solid piece that fits into a designated spot. It's a small part of a much bigger system, but a vital one. The gearbox takes the engine’s power and changes it into the right amount of force to turn your wheels. That involves a lot of spinning gears. This “Stop” makes sure those gears don’t wander, so the power gets transferred smoothly and efficiently. It helps maintain the correct gear ratios and prevents internal damage. Without this little guy doing its job, things can get messy inside the gearbox. You’ll notice if it fails because you’ll probably have trouble shifting gears, hear unusual noises coming from under the car— grinding, clunking, that sort of thing—or even find the gearbox won't shift at all. It acts like a shield, preventing metal – on – metal contact that can really ruin your day—and your gearbox. It’s a relatively inexpensive part to replace, but a broken one can quickly lead to much more expensive repairs. You can often find a replacement for these online at places like Fixparts Online, but it’s important to get the correct one for your specific vehicle model. Customer-approved reliability: Stop (MPN 4D0399109A) includes a 12-month warranty!

About Audi

Audi is a leading German automaker celebrated for crafting high-performance, luxury vehicles that combine advanced technology, elegant design, and exceptional driving experiences.

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• 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. Audi delivers excellence, FixParts Online delivers to your door.