Emissions System

When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem. 

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking. 

Vents gases from the crankcase back into the intake.
When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.

Genuine BMW Vent Hose
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54
 

Rein Crank Case Vent Hose is a high-quality replacement part designed to enhance the performance and longevity of your vehicle’s engine. Manufactured by Rein Automotive, this vent hose is built to withstand high pressures and temperatures, ensuring reliable crankcase ventilation. Engineered for a precise fit, it helps prevent harmful oil vapors from entering the intake manifold, improving overall engine efficiency. Available at Turner Motorsport, this vent hose is an ideal choice for drivers looking to maintain their vehicle’s performance and emissions standards.

• Designed for optimal crankcase ventilation, improving engine performance
• Reduces oil vapor contamination in the intake system, protecting engine components
• Made with durable materials to resist wear from heat and pressure
• Ensures precise fit and easy installation as a direct OEM replacement
• Helps reduce harmful emissions, supporting cleaner engine operation

Turner Motorsport offers the Rein Crank Case Vent Hose as a dependable solution to keep your engine running smoothly while meeting emissions regulations.

Restore proper engine ventilation with this premium replacement Crankcase Breather Valve (11127809512).

Designed to match the performance of the original BMW unit (OE 11-12-7-809-512 / 11-12-7-803-790), this valve maintains correct crankcase pressure, helps prevent oil buildup, and supports clean, efficient engine operation.

Crafted from high-quality, long-lasting materials and shaped to replicate the factory design, it installs easily in place of the stock breather without any modifications required.

Whether you’re addressing pressure-related drivability issues, refreshing your engine’s ventilation system, or performing preventative maintenance, this breather valve provides dependable performance and protects your BMW’s engine for the long haul.

BMW N63 4.4L Vent Pipe

The BMW N63 4.4L Vent Pipe addresses common issues with oil separators freezing in cold weather conditions. This problem often occurs if the vehicle is driven before it is fully warmed up, leading to a howling noise and multiple oil leaks. The crankcase breather valve in the vent pipe purges oil vapor from the engine block into the valve cover. However, condensation can sometimes cause the valve to freeze, which may result in the oil separator system failing, cracking, or disintegrating. This replacement vent pipe ensures proper function and prevents costly damage by maintaining the integrity of the oil separator system.

Benefits:

• Prevents Freezing Issues: Reduces the risk of oil separator failure in cold weather conditions.
• Eliminates Oil Leaks: Helps prevent leaks caused by frozen oil separators.
• Ensures Proper Ventilation: Maintains effective purging of oil vapor from the engine block.
• Durable Construction: Built to withstand harsh weather conditions and engine stress.
• Direct Replacement: Designed to fit seamlessly with BMW N63 4.4L engines.

The Rein Crank Case Breather Pipe is a high-quality replacement part designed specifically for BMW models, ensuring proper engine ventilation and maintaining optimal performance. This crucial component prevents pressure build-up in the crankcase, reducing the risk of oil leaks and protecting vital engine parts. Manufactured to meet or exceed OEM standards, the Rein Crank Case Breather Pipe guarantees a perfect fit and long-lasting durability. Available through Turner Motorsport, this pipe is the ideal solution for BMW owners looking to restore or upgrade their engine’s ventilation system.

• Designed for BMW models to ensure perfect fit and compatibility
• Prevents crankcase pressure build-up, reducing the risk of oil leaks
• Protects engine components from damage due to excess pressure
• Made from high-quality, durable materials for long-lasting performance
• Direct-fit replacement for easy and hassle-free installation
• Meets or exceeds OEM specifications for reliable engine performance

Upgrade your BMW’s engine ventilation system with the Rein Crank Case Breather Pipe, ensuring smooth performance and protecting against costly repairs.