The components that make up your automobile are made from some tough stuff, but over time, they will have to be replaced. The crankcase breather in your car’s engine is one of them. Typically, a crankcase breather should be replaced once every 12,000 miles along with the PCV valve, but if it becomes extremely clogged with oil and dirt, it should be replaced immediately. Luckily, crankcase breathers are not that hard to install in the engine and are easy to find in the market. In this guide, we are going to show you some pointers on buying a replacement crankcase breather for your vehicle.