Ever had a small part of your car break and suddenly everything else starts to go wrong? Well, that is what happens with a BMW when the PCV valve fails. The PCV is a little piece in the engine that most people don't know about, but it plays a huge role in keeping your car running smoothly. Let's look at what a PCV valve does, the factors that make it not function, and how you can go about fixing it. How Does BMW PCV Valve Works Your BMW's engine is like a big air pump that sucks in air, mixes it with fuel to make power, and then pushes out the stuff it doesn't need, like exhaust gasses. Now, while this is happening, there's also a bit of this mixture that doesn't get burned up. This leftover mix creates pressure inside the engine. That's where the PCV (Positive Crankcase Ventilation) valve comes into play. The PCV valve is a small doorkeeper whose job is to take those unburned gasses and extra pressure fr [...]

A Positive Crankcase Ventilation (PCV) valve is a crucial component of any BMW's engine. It helps to regulate the pressure in the engine crankcase and prevents the buildup of harmful gases and pollutants. If the PCV valve fails, it can cause a variety of issues with your BMW's engine, including decreased performance and increased emissions. In this article, we'll explore the five signs and reasons for a BMW's PCV valve failure. Rough Idle One of the most common signs of a failed PCV valve in a BMW is a rough idle. This is because the PCV valve regulates the flow of air in the engine, and if it fails, it can cause an imbalance in the air-to-fuel ratio. This can result in a rough or uneven idle, which can be especially noticeable when the car is stopped or in neutral. Decreased Fuel Economy Another sign of a failed PCV valve in a BMW is decreased fuel economy. If the PCV valve is not func [...]