Dorman PCV diaphragm repair kit 911-115

Key points

When the original PCV diaphragm fails, you may want to restore the part’s function without choosing a replacement based only on a broad vehicle description. The Dorman 911-115 is a diaphragm repair kit described as a direct-fit, OE-grade replacement for the original diaphragm on specified BMW models. It is intended to match the original part’s fit and function, rather than serve as a universal PCV component.

The listing also gives replacement references 11127588412 and 4510315040. Those numbers can help narrow your search, but they don’t establish fit for every BMW.

How to use it

This kit is presented as a replacement for a failed original diaphragm. For example, if a mechanic has identified the diaphragm as the part needing attention, the 911-115 is a candidate to compare against the vehicle’s existing part and application details. The supplied information doesn’t describe installation steps, so don’t assume the job is a simple swap or that no other repair is needed.

Keep in mind that compatibility is limited to select BMW models. The product description recommends checking the vehicle’s make, model and trim before purchase, a matching brand alone isn’t enough to confirm fit.

Practical tips

Start with the exact vehicle details and compare them with the kit’s application information. If you have the original part number, check whether it matches one of the listed references, but treat that as a useful cross-check rather than a substitute for confirming the vehicle application. The kit is described as being made from durable materials, though no specific material or service-life figure is provided.

This is a focused repair option for buyers looking to address the diaphragm itself. If your diagnosis points to a different PCV component, or you want to replace a larger assembly, this listing doesn’t establish that the kit covers those parts. It also doesn’t provide a fitment list in the supplied details, so vehicle-specific confirmation matters.

Before you decide

What does the Dorman 911-115 replace? It is described as a replacement diaphragm for the original PCV diaphragm on specified vehicles. The listing names 11127588412 and 4510315040 as replacement references.

Will it fit any BMW? No such broad compatibility is stated. It is intended for select BMW models, so confirm the exact make, model and trim against the fitment information before ordering.

Does the kit replace the entire PCV system? The product is identified as a PCV diaphragm repair kit. The available details don’t say that it includes or replaces the full PCV system.

In your case

It may suit you if the original diaphragm has been identified as the problem and you want a direct-fit-style replacement for a supported BMW application. It may not be the best choice if you haven’t confirmed fitment, need a different PCV component, or expect the kit to include a complete assembly. The deciding check is whether your vehicle and part reference match the kit’s stated application—not simply whether it is a BMW repair part.