Description
Product Overview
The Allmotorparts PCV Engine Valve Diaphragm Cap is a direct‑replacement component engineered for BMW N55 3.0L engines. Crafted from high‑quality black plastic, the cap features a modern design that mirrors original equipment specifications. It weighs only 0.06 kilograms (2.08 ounces) and measures 3.27 x 3.19 x 2.05 inches, making it easy to handle and install. The cap seals the PCV valve diaphragm, preventing engine oil from being expelled and shielding the valve train from dust, dirt, and moisture.
Usage
Designed for everyday driving and performance scenarios, this cap is ideal for owners of 2011‑2015 BMW 135i, 335i, 435i, 740i, and related models equipped with the N55 engine. Whether you are commuting, touring, or enjoying spirited driving, the cap maintains engine cleanliness and helps sustain fuel efficiency. 
Why Choose Us
Allmotorparts combines OEM‑style engineering with rigorous quality control to deliver a part that meets or exceeds factory standards. The cap is tested for fit, form, and function, ensuring a plug‑and‑play experience straight out of the box. Our customer service team stands ready to assist with any fitment questions, and a replacement is offered if the part fails prematurely.
Key Features
- Exact vehicle‑specific fit for BMW N55 3.0L engines
- Durable black plastic construction resists heat and chemicals
- Prevents oil leakage and protects valve train from contaminants
- Lightweight design simplifies installation and reduces overall engine weight
- Meets or exceeds OEM performance specifications
FAQ
Will this cap fit a 2014 BMW 740Li?
Yes, the cap is compatible with 2013‑2015 740Li, 740Li XDrive, and 740i models that use the N55 engine.
Do I need any special tools to install the cap?
No special tools are required. The cap bolts directly onto the existing PCV valve housing using the factory screws.
Is the plastic material safe for high‑temperature engine environments?
The high‑grade polymer is formulated to withstand typical engine bay temperatures and exposure to oil and fuel vapors.
What warranty does Allmotorparts provide?
The part comes with a one‑year limited warranty covering manufacturing defects.
Can I return the part if it does not fit my vehicle?
Yes, Allmotorparts offers a 30‑day return policy for unused items with proof of purchase.
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