Runs from the top of the oil separator up to rear of the intake manifold.
BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate.
Replace this and all the other components of the oil separator system to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable.
Bavarian Autosport served the needs of BMW and MINI enthusiasts from 1974-2019. In 2019, ECS Tuning acquired the Bavarian Autosport brand, committing to continuing the tradition of excellence Bav Auto is known for. Over the years, Bav developed their own brand of parts, accessories and upgrades. A lot of these parts are engineered and built by OEMs (Original Equipment Manufacturers companies who make original parts for BMW, MINI, and other European marques). Just as BMW and MINI do, we work with a variety of manufacturers in Europe, Asia and North America. In many cases, we have sourced parts that are superior to Original Equipment.
A lot of time and resources have been put into developing and evaluating these products, as well as the companies who produce them. We stand behind every product we sell. If any product fails to meet our standards or our customers' expectations we won't sell it, and we're certainly not going to put the Bavarian Autosport name on it. In fact, we're so confident in the quality of these parts that we back every Bavarian Autosport brand part with a 2-year warranty.
Bavarian Autosport
