Dorman 911-115 PCV Valve Diaphragm

PCV Valve Diaphragm for BMW Crankcase Ventilation

The Dorman 911-115 PCV valve diaphragm is built to match the fit and function of the original diaphragm used in select BMW crankcase ventilation systems. It is engineered with rubber and metal construction for durable, reliable performance in the applications listed below.

Compatible with BMW 220i, 320i, 328i, 428i, 528i, X1, X3, and related models, this diaphragm is a direct-fit service part for vehicles that use the OE-style crankcase ventilation design. The Dorman 911-115 is also a cross-reference for Genuine 11127588412 for the same application.

Key Features

• Direct replacement PCV valve diaphragm for specified BMW vehicles
• Matches original fit and function for crankcase ventilation service
• Rubber and metal construction for dependable sealing and movement
• Designed for BMW 2 Series, 3 Series, 4 Series, 5 Series, X1, X3, and Z4 applications
• OE-style service part for crankcase ventilation repair

Detailed Description

Dorman 911-115 is a PCV valve diaphragm designed for BMW crankcase ventilation systems where the diaphragm is serviced separately from the housing. It is made to replicate the original part’s fit and operating characteristics, helping restore proper diaphragm action in the crankcase ventilation assembly. This part number is commonly searched as Dorman 911-115 BMW PCV valve diaphragm and as a replacement for Genuine 11127588412.

Vehicle coverage includes 2012-2017 BMW 320i, 2012-2016 BMW 328i, 2014-2016 BMW 428i, 2012-2016 BMW 528i, 2012-2016 BMW X1, 2013-2017 BMW X3, and other listed BMW models. If you are servicing a BMW 320i xDrive, 328i xDrive, or 428i xDrive crankcase ventilation system, verify the exact application against the fitment list before installation.

What It Helps Address

• Crankcase ventilation diaphragm wear or failure
• Rough idle related to PCV system malfunction
• Oil vapor control issues from a damaged diaphragm
• Vacuum leaks caused by a compromised diaphragm seal
• Check engine light conditions tied to crankcase ventilation faults

Installation Notes and Tips

Confirm the vehicle year, model, and engine-specific crankcase ventilation design before ordering. Inspect the surrounding cover and spring components for wear, contamination, or damage during service. Clean mating surfaces thoroughly so the diaphragm seats correctly and seals as intended. Use the fitment list to verify coverage for BMW 220i, 228i, 320i, 328i, 420i, 428i, 520i, X1, X3, and Z4 applications.

Quality Assurance

Dorman designs this diaphragm to match the original part’s fit and function on the specified vehicles and builds it for durable, reliable performance. The part is constructed from rubber and metal and is intended as an OE-style service replacement for BMW crankcase ventilation repair.