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CCV Oil Separator System

BMWs oil separator and crankcase ventilation system is excellent at what it does when properly maintained. Always inspect any visible hoses when you are under the hood and follow the manufacturers replacement schedule.
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N55 Upgraded Crank Case Vent Hose - E/F Chassis N55
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ECS - Corporate Logo
T#:40106225
Part#: 018481LA02
In Stock
Sale - Save 25% $ 84.99

This product was last offered at the strikethrough price on
06-14-2026

$ 63.74 USD
Free Shipping
Sale - Save 25%
$ 84.99

This product was last offered at the strikethrough price on
06-14-2026

$ 63.74 USD
Free Shipping

Upgraded replacement for your crankcase vent hose P#11127584128 featuring upgraded silicone, stainless steel clamps, and new OE connectors and seals.

Enhance your BMW N55 engine with our Silicone Crank Case Vent Hose, a premium replacement for the fragile, failure-prone factory hose. Over time, the stock plastic hose deteriorates due to constant exposure to heat and oil, leading to cracks and leaks. Our solution? A high-quality silicone hose engineered for superior durability and long-term reliability.

To further enhance performance, we’ve lined the hose with fluorosilicone, providing exceptional resistance to oil and chemical degradation. Designed in-house using advanced CAD modeling and 3D scanning, this hose offers a precise OEM fit while eliminating the common weaknesses of plastic construction.

Each kit includes stainless steel hose clamps for a secure, hassle-free installation. Whether you’re replacing a worn-out CCV hose or upgrading for added peace of mind, this premium solution ensures your BMW N55 runs smoothly and efficiently for years to come.

Features:

Arrives preassembled with new OE fittings and seals
Direct OEM Fit – Retains factory hose dimensions while eliminating reliability issues.
High-Performance Silicone – Resists heat-related wear for long-lasting durability.
4-Ply Fluorosilicone Lining – Superior protection against oil and chemical exposure.
Stainless Steel Clamps Included – Secure installation and extended service life.
Give your BMW N55 the reliability it deserves—upgrade to the ECS Tuning Silicone CCV Hose today!

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Bav Auto Crankcase Pressure Regulator Valve - E36 E39 Z3
10X Entries Into Our F80 M3 Sweepstakes
Bavarian Autosport - Corporate Logo
T#:638090
Part#: 11151703484
In Stock
Sale - Save 20% $ 38.99

This product was last offered at the strikethrough price on
05-03-2026

$ 31.19 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 38.99

This product was last offered at the strikethrough price on
05-03-2026

$ 31.19 USD
Free Shipping on orders $49 and up
BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake. You should also look into replacing your valve cover gasket when changing the separator.
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N55 Silicone Upgraded Crank Case Vent Hose - E/F Chassis N55 ...
10X Entries Into Our F80 M3 Sweepstakes
10X Entries For Our Spin To Win Sweepstakes!
ECS - Corporate Logo
T#:40106226
Part#: 018481LA01
In Stock
Sale - Save 25% $ 26.99

This product was last offered at the strikethrough price on
06-14-2026

$ 20.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 26.99

This product was last offered at the strikethrough price on
06-14-2026

$ 20.24 USD
Free Shipping on orders $49 and up

Upgrade your BMW N55 engine with our Silicone Crank Case Vent Hose, a premium replacement for the fragile, failure-prone factory hose. Over time, the stock plastic hose deteriorates due to constant exposure to heat and oil, leading to cracks and leaks. Our solution? A high-quality silicone hose engineered for superior durability and long-term reliability.

To further enhance performance, we’ve lined the hose with fluorosilicone, providing exceptional resistance to oil and chemical degradation. Designed in-house using advanced CAD modeling and 3D scanning, this hose offers a precise OEM fit while eliminating the common weaknesses of plastic construction.

Each kit includes stainless steel hose clamps for a secure, hassle-free installation. Whether you’re replacing a worn-out CCV hose or upgrading for added peace of mind, this premium solution ensures your BMW N55 runs smoothly and efficiently for years to come.

Features:

Direct OEM Fit – Retains factory hose dimensions while eliminating reliability issues.
High-Performance Silicone – Resists heat-related wear for long-lasting durability.
4-Ply Fluorosilicone Lining – Superior protection against oil and chemical exposure.
Stainless Steel Clamps Included – Secure installation and extended service life.
Give your BMW N55 the reliability it deserves—upgrade to the ECS Silicone CCV Hose today!

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Bavarian Autosport - Corporate Logo
T#:639843
Part#: 11617501562
Special Order: No Guaranteed ETA
Sale - Save 15% $ 59.99

This product was last offered at the strikethrough price on
05-03-2026

$ 50.99 USD
Free Shipping on orders $49 and up
Sale - Save 15%
$ 59.99

This product was last offered at the strikethrough price on
05-03-2026

$ 50.99 USD
Free Shipping on orders $49 and up
An integral part of the emissions system, the PVC valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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ECS Tuning N54 PCV Valve Upgraded - BMW N54 3.0L
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:4154602
Part#: 090745ECS09
Special Order: No Guaranteed ETA
Sale - Save 25% $ 105.99

This product was last offered at the strikethrough price on
06-14-2026

$ 79.49 USD
Free Shipping
Sale - Save 25%
$ 105.99

This product was last offered at the strikethrough price on
06-14-2026

$ 79.49 USD
Free Shipping
The OEM plastic Positive Crankcase Ventilation (PCV) valve does not hold pressure well, even when brand new. This means that when you are in boost conditions, the highly pressurized PCV valve leaks charged air back into the crankcase. Depending on the condition of your PCV valve, this can range from irritating to dangerous. Additionally, if your valve cover is cracked, loose, or has a bad gasket, you are likely experiencing a pressure leak either internally or externally, as well as potential oil loss issues. ECS Tuning now offers a solid aluminum PCV valve upgrade designed to address these issues by preventing leaks and outlasting the standard BMW-designed PCV! The internal components of this aluminum PCV valve fit tighter than the OE design and can withstand significantly more abuse, perfect for high mileage N54s, N54s that have been tuned, or N54s with upgraded turbos (larger twin or big single turbo builds). This may not be your last PCV Valve, but it will certainly outlast both the Genuine BMW and other common aftermarket alternatives!
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