This key isn't just about unlocking doors, though it definitely does that. It handles a whole bunch of stuff – starting the engine, unlocking the glove box, sometimes even the trunk. Newer cars have a transponder chip inside the key, and that’s what communicates with the car’s security system. It's verifying it’s you that should be driving. It also controls things like power locks, remote start if you have it, and often the keyless entry system. Think of it as the first handshake with your car. It’s the starting point for everything. It tells the car, "Yep, this is an authorized driver," and then allows all the other systems to come online. It’s a pretty central piece. Without it, your car is just a really expensive paperweight. It's the signal that sets everything in motion, from the fuel pump to the ignition. Well, if it stops working, you’re not going anywhere. But beyond that, the security side is really important. That transponder chip acts like a shield against theft. If someone tries to use a key that doesn't have the correct chip, the car won’t start. You'll notice if your car is having trouble recognizing the key – maybe it cranks but doesn't fire up, or the security light stays on. You can find replacement keys pretty easily, and places like Fixparts Online carry a good selection. It's one of those things you don’t really think about until it fails, so it’s good to be aware of what it does and have a backup plan if possible. More than just a part: Key (MPN 4A0837219ROH) 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.

Why Choose Audi?

• Audi parts are designed specifically for your vehicle, ensuring a perfect fit and optimal performance. • Using genuine Audi parts helps maintain your vehicle’s value and original quality. • We offer a wide range of parts, from everyday maintenance items to complex components. • Audi parts are rigorously tested to meet high standards for safety and durability, giving you peace of mind. FixParts Online – Your Trusted Source for Quality Audi Auto Parts.