Emissions System

B58 PCV Repair Kit

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T#:23980285

Part#: 1112764517PCV

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Though BMW's B58 engine has proven to be mostly reliable, it does have one well-known problem, failure of the PCV Valve. This issue is especially common on cars with upgraded turbos. Signs that your BMW has experienced this failure include misfires, a rough idle, oil in the the intake/chargepipe, or white smoke coming from the exhaust. The good news is that this is easily fixed and is very affordable! This kit contains all of the items necessary to repair your PCV valve and restore the smooth operation of your B58 engine.

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Bremmen Crankcase Vent Hose - E60 E70 E82/88 E9X N52 3.0L

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T#:640155

Part#: 11157559528

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This valve cover vent hose helps to vent the crankcase fumes on BMW's with the N51 / N52 6 cylinder engines. If replacing the valve cover, we recommend purchasing this item as well as it often will break while removing it from the valve cover.

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Bremmen "Cold Climate" Crankcase Pressure Regulator Valve Kit - BMW M...

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T#:2528129

Part#: 11617533400S1

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BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. Don't forget to order a valve cover gasket, throttle body gasket, and a new intake boot to make your separator change easier and more comprehensive.

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Blow-By Vent Hose

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T#:30629687

Part#: 11157553949

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CCV Hose

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T#:51391238

Part#: 11127850244

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Performance Oil Separator Kit - M52/S52

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T#:51356040

Part#: 059015LA02KT2KT

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On M52/S52-equipped BMWs, the factory crankcase ventilation (CCV) system is a notorious weak link. Between brittle plastic corrugated hoses that crumble from heat soak and an internal cyclone diaphragm prone to tearing, a failing CCV leads to massive oil consumption, vacuum leaks, and that dreaded "howling" whistle.

This kit addresses these issues with all new components and hardware. Both oil separator hoses, the cyclone separator itself, the mounting grommet, and the retaining bolts are included. Servicing this system is guaranteed to restore performance lost as a result of worn CCV components.

Kit includes:

Cyclone Separator/Crankcase Pressure Regulator Valve High Performance Silicone Breather Hose Return Hose Mounting Grommet Hex Bolt (3)

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Crankcase Ventilation Hose

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T#:35357256

Part#: 11157848340

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Fuel Tank Ventilation Valve Pipe

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T#:8677197

Part#: 13907618643

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Allows fuel fumes to vent into the engine's intake

Crankcase Ventilation Valve With Gasket

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T#:48125820

Part#: 11127809512

Ships on Jan 11, 2027

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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.

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Crankcase Vent Hose

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T#:30629661

Part#: 11157831311

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Oxygen Sensor - Downstream Catalytic Converter

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T#:27105147

Part#: 11787589475

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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

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T#:24344785

Part#: M54OILSEPKT

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If you need to perform a complete oil separator system service, this Level 2 kit provides you with all of the main components necessary to service your engine oil separator system. This Level 2 kit includes the following: Oil Separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.

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Crank Case Vent Hose Kit - S63 4.4L Engine

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T#:23913949

Part#: CRNKVENTKITKT

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Elevate your S63 4.4L engine's capabilities with our meticulously designed Crank Case Vent Hose Kit. Crafted from premium-grade materials, this kit ensures superior ventilation, mitigating pressure accumulation within the engine, thereby enhancing its overall performance.

Engineered to precise specifications, our kit seamlessly replaces the OEM vent hoses, guaranteeing a perfect fit. By reducing stress on the engine, it prolongs its lifespan and maintains peak functionality. Rely on this kit to provide unparalleled performance and unwavering reliability for your S63 4.4L engine.

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Extraction Line

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T#:30629688

Part#: 11157537701

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Oil Separator Valve

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T#:8677203

Part#: 11617531423

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Bremmen Crankcase Ventilation Connecting Pipe - Cylinders 1-4 - E70/1...

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T#:640154

Part#: 11157646086

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Connects to the valve cover over cylinders 1-4. These pipes tend to crack after become brittle from numerous heating and cooling cycles. If this happens, Bremmen pipes are a perfect replacement to restore a tight seal and prevent any check engine codes.

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Leak Detection Pump - Priced Each

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T#:35121140

Part#: 16137193479

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Oxygen Sensor

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T#:27105145

Part#: 11787545075

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Oil Separator kit - N63

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T#:56291074

Part#: 11158636540KT2

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If your BMW is burning oil, showing unmetered air faults, or suffering from degraded throttle response, a compromised breather system is usually the culprit. The N63 Crankcase Breather Package pairs Genuine BMW oil separators with OE tier Rein connecting pipes. Designed to restore factory level oil separation and sealed vacuum integrity across both cylinder banks

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Bremmen Crankcase Ventilation Connecting Pipe - Cylinders 5-8 - E70/1...

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T#:640153

Part#: 11157646087

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Connects to the valve cover over cylinders 5-8. These pipes tend to crack after become brittle from numerous heating and cooling cycles. If this happens, Bremmen pipes are a perfect replacement to restore a tight seal and prevent any check engine codes.

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Oil Separator Vent Hose

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T#:33746535

Part#: 11617559530

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Vacuum Control Valve

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T#:47850818

Part#: 11747810831

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Vent Hose for N14 N18 1.6L Engine

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T#:26238478

Part#: 11157605186

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Upgrade your N14 N18 1.6L Engine with the Vent Hose. This hose connects to the top valve cover with a special hose clip end and extends to the bottom side of the intake manifold, ensuring optimal performance of your Mini. It's a crucial component of the intake system, designed to enhance engine efficiency and longevity.

Ensures proper ventilation of the engine
Connects securely to the valve cover and intake manifold
Facilitates efficient airflow within the engine compartment
Compatible with N14 N18 1.6L Engine models
Easy to install and replace as needed

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Crankcase Vent Pipe - Cylinders 5-8

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T#:35357253

Part#: 11157589992

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PCV Vent Pipe

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T#:26438184

Part#: 11127588417

Ships on Dec 22, 2026

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Crankcase Vent Pipe - Cylinders 1-4

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T#:35357254

Part#: 11157589989

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Crankcase Vent Valve

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T#:8741204

Part#: 11157501567

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This valve is also commonly called the PCV valve, and is important to maintain a proper idle. When this valve begins to leak, you will get a large vacuum leak that can cause many problems.

Crank Case Vent Hose - S63

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T#:35357263

Part#: 11157843150

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The engine crankcase breather hose is a vital part of the Positive Crankcase Ventilation (PCV) system, responsible for directing pressurized air from the engine crankcase to the air/oil separator, also known as the PCV valve. This separator removes oil vapors from the air, allowing the oil to return to the engine while feeding the filtered air back into the intake system to support efficient combustion.

As a byproduct of the combustion process, positive crankcase pressure naturally builds up in the engine. The breather hose operates under constant exposure to heat, pressure, and an air/oil vapor mixture, making it prone to wear and failure over time. Ensuring the breather hose is in proper working condition is crucial for maintaining engine performance, adhering to emissions standards, and preserving the functionality of the PCV system. Promptly replace this component at the first signs of damage or degradation to avoid further complications.

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Vacuum Pipe

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T#:52586629

Part#: 11157603816

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Bremmen Crankcase Oil Seperator Valve - E38 E39 M62 4.4L

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T#:640156

Part#: 11151705272

Special Order: No Guaranteed ETA

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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 the dipstick, valve cover, and air intake.

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Bremmen Parts Crankcase Vent Pipe - Cylinders 1-4 - E70, E71, F01, F0...

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T#:1195923

Part#: 11157575640

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Replace your damaged crank vent pipe

N20 Vacuum Hose - 11657607726

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T#:36981055

Part#: 11657607726

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Due to weak rubber construction and exposure to heat, this vacuum hose may be brittle and/or broken.

Replace it with this high-quality piece from Bremmen Parts to ensure proper turbocharger functionality.

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Rear Oxygen Sensor Set - N52, N54

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T#:55353594

Part#: 11787545074/5KT2

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Sluggish oxygen sensors do a lot more than just light up your dashboard with an annoying Check Engine Light—they directly choke your BMW’s performance.

Air Adjustment Unit/DISA Valve Kit

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:15677538

Part#: 11617533344-KT

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05-03-2026

$ 122.12 USD

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A bad DISA valve can cause a variety of issues, from a loud racket in the engine bay, hesitation at low rpm and a rough idle with lean codes. If the valve is making a loud noise, we recommend replacing it as soon as possible. It is possible for the pin holding the flap to be sucked into the motor causing serious damage. Very easy to replace, just need to undo the 4 bolts holding it to the intake manifold. Includes new mounting hardware

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Exhaust Backpressure Sensor - 13627805758

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T#:36710102

Part#: 13627805758

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05-03-2026

$ 54.99 USD

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This exhaust backpressure sensor is a critical component of your vehicle's Diesel Particulate Filter (DPF) system, designed to monitor backpressure levels and trigger the regeneration cycle when needed. By ensuring the DPF operates efficiently, this sensor helps maintain optimal engine performance and prolongs the life of your powertrain.

A malfunctioning sensor is a common cause of check engine lights and DPF-related fault codes. If you're encountering issues with regeneration or fault codes, replacing the faulty sensor is essential to restore proper functionality. Choose this high-quality replacement from Bremmen for a reliable solution to keep your DPF system performing at its best.

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Crankcase Ventilation Hose

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:30629689

Part#: 11157532649

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$ 12.79 USD

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Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

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T#:55857772

Part#: 11787589475KT2

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$ 342.99 USD

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Extreme exhaust heat and carbon buildup degrade your factory oxygen sensors over time, sending lazy data to your DME and robbing you of performance.

Cold Climate Oil Separator Kit - Level 2

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T#:15744065

Part#: 114317400450-KT

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06-15-2026

$ 137.40 USD

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If you are ready to perform a truly complete oil separator system service, our Level 2 kit provides you with all of our Level 1 kit components plus a throttle body gasket, throttle body inlet boot, ICV grommet, and dipstick tube o-ring. Our Level 2 Cold Climate kit includes the following: Oil separator - BMW cold climate recommended Hose from oil separator to dipstick tube - BMW cold climate recommended Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.

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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:640147

Part#: 11611432559

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$ 17.89 USD

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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine

Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52

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T#:56110313

Part#: 11787558055KT

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08-13-2026

$ 289.50 USD

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Your engine's air fuel ratio needs to be dead on. Worn out factory pre-cat oxygen sensors delay vital data to the DME, leading to sub optimal fueling, lost horsepower, and dangerous hesitation under load.

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Oil Separator Kit - Level 1

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T#:15710823

Part#: E46M5411_61KT

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$ 93.71 USD

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Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. ur Level 1 kit includes the following; Oil separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold

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Front Oxygen Sensor Set - E9x, E82, E88, Z4

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T#:55317713

Part#: BFR1/2O2SKT2

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07-14-2026

$ 325.67 USD

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Over time, that degradation robs your BMW of its crisp throttle response, tanks your fuel economy, and leaves you staring at a failed emissions ticket

Oil Separator - Crankcase Ventilation System

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T#:8741202

Part#: 11151705272B

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$ 19.54 USD

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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.

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Crankcase Ventilation Refresh Kit

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T#:57543744

Part#: 11158647962KT2

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09-29-2026

$ 211.22 USD

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Maintain optimal engine vacuum and prevent oil blow-by failures under hard driving with this complete Crankcase Ventilation Refresh Kit. Aged oil separator valves and heat stressed plastic hoses fail unexpectedly, leading to oil ingestion, loss of power, and damaged rear main or valve cover gaskets from excessive crankcase pressure buildup. Designed as a direct fit refresh, this kit ensures crisp throttle response, proper engine breathing, and total peace of mind on the street or track.

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Vaico Oil Separator Valve - E38, E39

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T#:363292

Part#: 11151705272

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05-02-2026

$ 23.87 USD

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Connects to the vent tube which is attached to the PCV valve

Oil Separator - Crankcase Ventilation System

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:8741203

Part#: 11151705237

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$ 6.50 USD

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Critical crankcase ventilation cyclone separator - great replacement or custom install! Failure of the oil separator commonly causes problems related to smoking or a check engine light. Featuring an approximately ¾” air inlet/outlet and ½” oil drain outlet, this oil separator/CCV commonly found in custom installations on many vehicles.

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Bremmen Parts O Ring

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:558205

Part#: 11617533329

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$ 4.89 USD

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Seals the PCV angle connector to the intake manifold

Oxygen Sensor

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:27105146

Part#: 11787589121

Special Order: No Guaranteed ETA

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05-03-2026

$ 108.89 USD

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Oxygen Sensor - Priced Each

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:56291060

Part#: 11787548961

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10-08-2026

$ 59.39 USD

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Bremmen Parts Crankcase Vent Pipe - Cylinders 5-8 - E70, E71, F01, F0...

10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in Turner Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

T#:1195924

Part#: 11157575641

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$ 39.99 USD

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Replace your damaged crank vent pipe

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