This little clip basically holds your oxygen sensor securely in place, right where it needs to be in the exhaust system. It's a simple piece, but it does a really important job of keeping everything aligned and stable. It's not about making the sensor work, it’s about making sure it stays working correctly by keeping it from moving around. Think of your exhaust system as a long pipe, and the oxygen sensor sticks into that pipe to measure the gases coming out of the engine. This clip is what anchors the sensor. Without it, vibrations and just normal road jostling will cause the sensor to wiggle and potentially damage the sensor itself or the exhaust pipe where it goes in. It’s positioned right where the sensor screws into the exhaust manifold or pipe. It’s important because a loose oxygen sensor can throw off your engine’s performance. If the sensor isn’t reading accurately because it’s moved out of position, your engine computer can miscalculate the air/fuel mixture. That can lead to things like reduced fuel economy, rough idling, or even a check engine light. It acts like a shield against those kinds of problems caused by movement. You’ll notice if one’s missing or broken usually because of a check engine light, or sometimes you’ll hear a slight exhaust leak sound. These clips are fairly inexpensive, and it’s much cheaper to replace a clip than to deal with a damaged sensor or exhaust system. You can often find them on sites like Fixparts Online if you need one quickly. Dedicated support: Retaining Clip (MPN 03L131645B) includes a 12-month warranty!

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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.