The BMW B58 engine is known for premature PCV diaphragm failure, which is often caused by the original rubber becoming brittle and cracking over time. This leads to vacuum leaks, poor performance, and fault codes.Buy cheap, buy twice! Our Rival Performance Diaphragm OE Replacement Kit is superior and includes everything you need to restore back to proper function, including a new diaphragm cap and replacement end cap! This is ideal since the original is often damaged during the removal process. Unlike many low-cost alternatives on the market, this is not a flimsy import or a generic copy. ours are built to last, developed by enthusiasts who understand what proper quality should look like under the bonnet. A must-have upgrade!Specifications:✔ Designed with longevity in mind✔ No cheap or questionable materials used✔ Backed by a UK-based performance brand✔ Includes end cap to prevent installation issues note: image is for illustration purposes and may differ on delivery
