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Oil Separation & Breather System

Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could experience rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

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Oil Separator Valve
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Hengst - Corporate Logo
T#:22064588
Part#: AS819M
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$ 41.99

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05-03-2026

$ 31.99 USD
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$ 41.99

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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.
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Vaico Oil Separator Valve - E38, E39
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Vaico - Corporate Logo
T#:363292
Part#: 11151705272
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This product was last offered at the strikethrough price on
05-02-2026

$ 25.09 USD
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$ 31.99

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Connects to the vent tube which is attached to the PCV valve
Pressure Control Valve (PCV) Repair Kit
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Genuine BMW - Corporate Logo
T#:24079614
Part#: 11121025447
Ships in 1-2 days
Sale - Save 5% $ 288.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 274.10 USD
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$ 274.10 USD
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BMW's B58 engine has been great, but one major weakness is the PCV valve. As stated by BMW, "The PCV's rubber diaphragm seal may fail, causing insufficient engine oil separation. As a result, the engine may emit blue/white smoke from the exhaust tailpipes, shudder during operation, and/or run with reduced power (limp mode). At idle, a high-frequency whistling noise may be heard in the engine compartment, and the malfunction indicator lamp (MIL) may also illuminate." If your BMW is experiencing these issues, there is a very likely chance your PCV has failed. If so we recommend replacing your PCV with this Genuine BMW repair kit! Don't want to spend over $200 for this fix? We also offer T#23980285 which also replaces this valve but at roughly 1/10th the price!
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Oil Separator Hose - E46, Z4
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Bavarian Autosport - Corporate Logo
T#:579880
Part#: 55080
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$ 19.99 USD
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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.

Bremmen Parts O Ring
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Bremmen Parts - Corporate Logo
T#:558205
Part#: 11617533329
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$ 4.89 USD
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Seals the PCV angle connector to the intake manifold
Oil Separator - Crankcase Ventilation System
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Bremmen Parts - Corporate Logo
T#:8741202
Part#: 11151705272B
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$ 19.07 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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Rein - Crankcase Vent Hose E46 Z3 M Roadster, E46 Z3 M Coupe ...
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Rein - Corporate Logo
T#:34181269
Part#: 11157831311
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$ 11.99 USD
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Crankcase Vent Hose ABV0329 is an essential component designed for BMW engines, ensuring optimal performance of the crankcase ventilation system. This high-quality vent hose plays a critical role in regulating and redirecting excess gases from the crankcase back into the engine's intake, reducing harmful emissions and preventing pressure buildup. Crankcase Vent Hose ABV0329 helps maintain engine efficiency and protects against potential damage caused by over-pressurization or oil leaks.

Made from durable, heat-resistant materials, this hose is built to withstand the high temperatures and pressures common in BMW engines. It is a direct-fit replacement, making installation simple and efficient for both professionals and DIY mechanics. Available from Turner Motorsport, Crankcase Vent Hose ABV0329 is the perfect solution for restoring and maintaining your BMW’s crankcase ventilation system.

Key Benefits:

  • Ensures proper crankcase ventilation for optimal engine performance
  • Reduces harmful emissions by redirecting excess gases into the intake
  • Prevents pressure buildup and protects against oil leaks
  • Constructed from durable, heat-resistant materials for long-lasting reliability
  • Direct-fit replacement, ensuring easy installation for various BMW models
  • Available from Turner Motorsport, a trusted source for BMW performance parts
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Victor Reinz O-Ring - E32, E34, E38, E39
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Victor Reinz - Corporate Logo
T#:592731
Part#: 07119906360
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$ 3.99

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05-07-2026

$ 2.99 USD
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$ 2.99 USD
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If this gasket fails it can cause oil leaks and other issues. Replace it at any sign of failure!

Oil Separator - Crankcase Ventilation System
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Bremmen Parts - Corporate Logo
T#:8741203
Part#: 11151705237
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$ 7.00 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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BMW B58 PCV Repair & Premium Oil Service Kit
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Assembled By ECS - Corporate Logo
T#:55749586
Part#: 83212365954KT13
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$ 211.99

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07-09-2026

$ 211.26 USD
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$ 211.26 USD
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Fix the whistle, replace the brittle vent hose, and flush out the contaminated oil. This kit pairs the highly sought after PCV fix with a premium Liqui Moly Top Tec 6600 0W-20 oil service to give your engine a completely clean slate. When the integrated PCV diaphragm on your B58 tears, it causes a massive unmetered vacuum leak that pulls raw oil vapor directly into the combustion chambers. This doesn't just create a loud, embarrassing whistling noise at idle—it causes poor air/fuel mixtures that force raw, unburned fuel past the piston rings. This blow-by heavily dilutes your engine oil, destroying its ability to properly lubricate the bearings and timing chain. Fixing the PCV using this Bremmen repair kit (which saves you from buying an entirely new valve cover) is only half the battle. You absolutely must get that compromised oil out of the crankcase. This comprehensive service kit includes the Bremmen PCV repair cap, the fragile corrugated crankcase breather hose that almost always snaps during the repair process, and a complete premium oil change. We've included Liqui Moly Top Tec 6600 0W-20, which carries the strict BMW LL-17 FE+ approval. This ultra-modern, low-friction oil ensures instant lubrication to the turbocharger upon cold start while maximizing fuel efficiency. Paired with a fresh OEM Mann oil filter, this kit completely reverses the collateral damage of a PCV failure. Kit Includes: (1) PCV Valve Repair Kit (Replaces OE # 11121025447) (1) CCV / Crankcase Vent Hose (Replaces OE # 11157637521) (1) Liqui Moly Top Tec 6600 0W-20 Engine Oil - 7 Liters (BMW LL-17 FE+ Approved) (1) Hengst Oil Filter Kit with O-Rings (Replaces OE # 11428583898) (1) Oil Drain Plug with Crush Washer
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Ultimate BMW B58 PCV & Ignition Refresh Kit
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Assembled By ECS - Corporate Logo
T#:55713529
Part#: 11157637521KT
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$ 567.99 USD
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$ 567.99 USD
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When the integrated PCV diaphragm on your B58 engine tears, it does more than just create a loud whistling noise under the hood. The ruptured valve allows the engine to pull raw crankcase oil vapor directly into the intake manifold and combustion chambers. By the time you diagnose the PCV failure, your engine has likely been burning oil for hundreds of miles. This thick oil vapor heavily coats the spark plugs in carbon, leading to rough idles, hesitation, and misfires—even after the PCV vacuum leak is fixed. Furthermore, the extreme heat trapped near the firewall on the B58 architecture naturally degrades the ignition coils over time. This ultimate refresh kit is the definitive "while you're in there" solution. It utilizes the highly sought-after Genuine BMW PCV fix kit (allowing you to repair the valve without replacing the entire expensive valve cover) and pairs it with a fresh set of OEM spark plugs and ignition coils. We also include a brand-new Genuine BMW corrugated CCV breather hose, as the factory plastic line is notoriously brittle and almost always snaps when you attempt to move it out of the way during the PCV repair. Kit Includes: (1) PCV Valve Repair Kit (Replaces OE # 11121025447) (1) CCV / Crankcase Vent Hose (Replaces OE # 11157637521) (6) NGK Spark Plugs (Replaces OE # 12120040551) (6) Turner Ignition Coils (Replaces OE # 12138643360)
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Crank Case Vent Hose - S63
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Bremmen Parts - Corporate Logo
T#:35357263
Part#: 11157843150
In Stock
$ 60.99

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05-03-2026

$ 44.99 USD
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$ 60.99

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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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Febi Crankcase Ventilation Dipstick Hose - E39, E46, E60, E83, Z3, Z4...
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Febi - Corporate Logo
T#:359557
Part#: 11157532629
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$ 23.28 USD
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$ 23.28 USD
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From oil separator to dipstick tube
Crankcase Vent Hose - Cylinders 5-8
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Rein - Corporate Logo
T#:384972
Part#: 11617547186
Ships in 3 Business Days
$ 59.99 USD
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Should be replaced anytime leaks are detected
OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52
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Rein - Corporate Logo
T#:402020
Part#: 11617522933
Ships in 1 Business Day
$ 19.99 USD
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If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.

URO Crankcase Ventilation Hose - BMW M52TU M54
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URO - Corporate Logo
T#:377307
Part#: 11157532649
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$ 12.99 USD
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$ 12.99 USD
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From oil separator to dipstick tube

Oil Separator Valve
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Rein - Corporate Logo
T#:594299
Part#: 11617531423
Ships in 3 Business Days
$ 120.81 USD
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The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.
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Febi Crankcase Ventilation Hose - E39, E46, E60, E83, Z3, Z4 ...
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Febi - Corporate Logo
T#:6707
Part#: 11157532649
In Stock at Vendor
$ 19.12

This product was last offered at the strikethrough price on
05-29-2026

$ 17.01 USD
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$ 17.01 USD
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ENGINE VENT HOSE 11157532649

Vacuum Pipe
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Rein - Corporate Logo
T#:17704694
Part#: 11157603816
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$ 35.99 USD
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Upper Oil Separator Vent Tube
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Rein - Corporate Logo
T#:384805
Part#: 11611440317
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$ 20.30 USD
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Pressure Regulator Valve Repair Kit
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URO - Corporate Logo
T#:600041
Part#: 11127547058
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$ 14.99 USD
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Return Pipe
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URO - Corporate Logo
T#:372847
Part#: 11617504536
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$ 16.99 USD
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$ 16.99 USD
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Runs from the intake manifold back to connecting hose
Rein Crankcase Ventilation Hose - Cylinders 1-4
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Rein - Corporate Logo
T#:17738390
Part#: 11617563476
Ships in 3 Business Days
$ 46.99 USD
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$ 46.99 USD
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Manufactured with high-quality materials to withstand heat, dirt, and debris, matching OE expectations.
URO Crankcase Vent Valve Repair Kit - B58
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URO - Corporate Logo
T#:55713528
Part#: 11121025447
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$ 222.99

This product was last offered at the strikethrough price on
07-08-2026

$ 219.99 USD
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$ 219.99 USD
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The URO Parts Crankcase Vent Valve Repair Kit is the smart technician's fix for the notorious BMW crankcase ventilation failures.


URO PCV Valve - Left Cylinder Bank - BMW N73 6.0L
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URO - Corporate Logo
T#:592794
Part#: 11157563505
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$ 30.99 USD
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When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes and poor idle.
Crankcase Ventilation Connecting Pipe - Cylinders 5-8
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Hamburg Tech - Corporate Logo
T#:50626659
Part#: 11157646087
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$ 59.99 USD
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Hose - From Oil Separator to Oil Dipstick Tube - E46 E39
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Rein - Corporate Logo
T#:2879
Part#: 11157532629
In Stock at Vendor
$ 11.99

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$ 10.99 USD
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$ 10.99 USD
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This is the updated hose that goes from the Crankcase Oil Separator Valve to the oil dipstick tube. This tube tends to get plugged with oil sludge and becomes brittle and cracks. It fits E46 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi - E39 525i 530i - E60 525i 530i 2004-2005 - X3 2.5i 3.0i 2004-2006 - Z3 2.5i 3.0i - Z4 2.5i 3.0i 2003-2006.
In german, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2001-2005 E46 BMW 325i 325ci 325xi Only for cars with M54 engine
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2001-2002 Z3 BMW Z3 2.5i Z3 3.0i
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i
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Febi Oil Separator - E53
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Febi - Corporate Logo
T#:363700
Part#: 11151705237
In Stock at Vendor
$ 21.99

This product was last offered at the strikethrough price on
05-07-2026

$ 20.99 USD
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$ 20.99 USD
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Critical crankcase ventilation cyclone separator - great replacement or custom install!

Crankcase Ventilation Hose
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URO - Corporate Logo
T#:378279
Part#: 11617533398
Ships in 1 Business Day
$ 21.99 USD
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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.
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PCV Adapter Fitting N54
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Vargas Turbo Technologies - Corporate Logo
T#:557961
Part#: VTT-PCV-ADAPTER
Ships in 10 Business Days
$ 145.99 USD
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Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

This is the adapter fitting that is required to convert your N54 to external PCV if you want to keep your crankcase under vacuum at idle, and anytime you have a vacuum condition in your intake manifold. They are made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip.

This must be used in conjunction with  the Vargas billet check valve, and PCV delete fitting or requires plugging of the intake PCV ports. Installs inline on the throttle body, and adds a -8AN male to adapt to a catch cans, or any custom set up.

Made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip

This part fits the following BMW engines: 
2006-2012 N54

 

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Crankcase Ventilation Dipstick Hose - BMW M52TU M54
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URO - Corporate Logo
T#:359570
Part#: 11157532629
Ships in 1 Business Day
$ 12.99 USD
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This tube runs from the oil separator to the lower dipstick tube.

 

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 this and all the other components of the oil separator system 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.

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Crankcase Vent Hose - From Valve Cover to Oil Separator - E46 E39 E6...
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URO - Corporate Logo
T#:2853
Part#: 11611432559
Ships in 1 Business Day
$ 14.99 USD
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$ 14.99 USD
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This Crankcase Vent Hose - From Valve Cover to Oil Separator fits BMWs with the M52 or M54 6 cylinder engine including E46 323i 325i 328i 330i E39 525i 528i 530i E60 525i 530i X3 2.5i 3.0i X5 3.0i Z3 2.5 2.8 3.0i Z4 2.5i 3.0i.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
1999-2005 E46 BMW 325i 325ci 325xi - only with M54 engine
1999-2003 E39 BMW 528i 528i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8i Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
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Victor Reinz Oil Separator O-Ring - E31, E32, E34, E38, E39 ...
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Victor Reinz - Corporate Logo
T#:19104
Part#: 11151747978
Ships in 1 Business Day
$ 5.69

This product was last offered at the strikethrough price on
06-05-2026

$ 5.68 USD
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$ 5.68 USD
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O-RING 11151747978 Manufactured by Reinz


Febi Crankcase Ventilation Hose - E34
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Febi - Corporate Logo
T#:381678
Part#: 11151708801
Ships in 1 Business Day
$ 11.99

This product was last offered at the strikethrough price on
05-07-2026

$ 9.99 USD
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$ 9.99 USD
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Prone to cracking and breaking.
Crankcase Ventilation Connecting Pipe - Cylinders 1-4
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Hamburg Tech - Corporate Logo
T#:50626658
Part#: 11157646086
Ships in 1 Business Day
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$ 57.99 USD
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Rein Return Pipe - E39, E46, E53, E60, E83, Z3, Z4
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Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock
$ 19.99 USD
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Runs from the intake manifold back to connecting hose


BMW Breather Valve
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Febi - Corporate Logo
T#:17339405
Part#: 11127537733
In Stock at Vendor
$ 27.99

This product was last offered at the strikethrough price on
05-29-2026

$ 19.99 USD
$ 19.99 USD
Are you experiencing a slight loss of power? This pressure regulator valve repair kit could easily be the culprit. With a bad gasket or weak spring you could be losing pressure, resulting in less power.
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Crankcase Vent Hose - Cylinders 1-4
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Rein - Corporate Logo
T#:384973
Part#: 11617547185
Ships in 3 Business Days
$ 57.99 USD
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$ 57.99 USD
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Should be replaced anytime leaks are detected
BMW Oil Separator Valve | E38 E39 540i 740i 740iL M62 4.4L Engine ...
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Rein - Corporate Logo
T#:39059263
Part#: 11151705272
In Stock at Vendor
$ 25.00 USD
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$ 25.00 USD
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BMW Oil Separator Valve | E38 E39 540i 740i 740iL M62 4.4L Engine is an essential component designed to maintain optimal engine performance by purging oil vapors from the engine block into the valve cover. This valve features four hoses connecting it to the dipstick, valve cover, and air intake system, ensuring efficient crankcase ventilation. BMW engines, especially in colder climates, are known to experience issues with oil separators freezing if the engine isn't properly warmed up, leading to symptoms such as howling noises followed by oil leaks.

  • Effectively purges oil vapors from the engine block to maintain clean operation
  • Designed for BMW E38 and E39 models with M62 4.4L engine
  • Helps prevent oil separator freezing in cold weather conditions
  • Features four hoses connected to the dipstick, valve cover, and air intake for optimal ventilation
  • Reduces engine sludge buildup, preventing potential damage and maintaining efficiency
  • Durable construction to withstand high temperatures and the demands of the engine

Replace a worn oil separator valve to maintain the proper ventilation and efficiency of your BMW engine, preventing oil leaks and other performance issues.

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Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
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Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 2 Business Days
$ 458.99 USD
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$ 458.99 USD
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The BMW N52 engine was deisgned with a crankcase vent system that relies on a heated oil separator valve to separate vapor from the liquid oil. Under ideal circumstances, the oil vapor would pass back into the intake and get burned up during normal combustion. The liquid oil would follow a path back down into the oil pan and be reused. This system is environmentally friendly but plagued with problems. The heating elements can fail or oil and carbon particles can block the oil separator valve. With no escape, the oil will continue to pool and collect in the valve cover or make its way into the combustion chamber leading to excessive oil consumption, blue smoke from the exhaust, idle and running issues. These issues are worse in colder climates where the freezing temperatures create an oil sludge condition that is impossible to clear. The plastic hoses can become brittle and crack which leads to vacuum leaks and oil leaks. Thankfully, the CCV is replaceable on the early N52 engines (2006 and some 2007 models) and should be inspected during a major service and any time the valve cover is off. Oil can also back up into the throttle body, which is easier to check than the oil separator itself. Later N52 engines do not have a serviceable oil vent as it is integrated into the valve cover and not a separate part.

This is a kit containing the oil separator, the vent hoses, and the intake manifold gaskets that are done during a typical oil separator replacement. Complete kit includes:
  • 11617531423, Genuine BMW oil separator
  • 11617559530, vent hose
  • 11157522931, oil separator hose
  • 11157567801, return hose
  • 11157537701, extraction hose
  • 11617547242, intake manifold gaskets (set of 6)
    The intake manifold must be removed to access the oil separator so new profile gaskets are included. We also recommend (but not required) a new oil separator fitting on the intake manifold because it's one of the heated elements that vaporizes the oil as it enters the intake.

    The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.

    This kit fits the following BMWs:
    -10/2005 E90 BMW 325xi 330xi - Sedan
    -10/2005 E91 BMW 325xi - Wagon
    -10/2005 E60 BMW 525xi 530xi
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    "Cold Climate" Crankcase Pressure Regulator Valve
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    URO - Corporate Logo
    T#:376770
    Part#: 11617533400
    Ships in 1 Business Day
    $ 70.99

    This product was last offered at the strikethrough price on
    04-10-2026

    $ 40.99 USD
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    $ 40.99 USD
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    Commonly referred to as the "oil separator" or PCV
    Oil Separator
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    URO - Corporate Logo
    T#:555633
    Part#: 11151705237
    Ships in 1 Business Day
    $ 10.99

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

    $ 9.99 USD
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    $ 9.99 USD
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    Critical crankcase ventilation cyclone separator - great replacement or custom install!

    BMW PCV Valve - Right Cylinder Bank
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    Rein - Corporate Logo
    T#:45723145
    Part#: 11157563506
    Ships in 3 Business Days
    $ 19.99 USD
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    The Pressure Control Ventilation (PCV) valve is designed to route high-pressure blow-by gases from the crankcase into the intake manifold, relieving excess pressure while recycling gases back into the combustion process. When the PCV valve fails, it can lead to excessive oil consumption, rough idle, and stored engine fault codes. Replacing a worn or faulty valve restores proper crankcase ventilation, smooths out idle, clears codes, and helps keep your engine performing at its best.
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    Rein Crank Case Ventilation Valve
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    Rein - Corporate Logo
    T#:17704764
    Part#: 11158647298
    In Stock at Vendor
    $ 61.80 USD
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    Designed to be a direct fit for OEM hoses, Rein has replacements for an affordable cost.

    Oil Return Hose
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    URO - Corporate Logo
    T#:592793
    Part#: 11157560068
    Ships in 1 Business Day
    $ 9.99 USD
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    Hose that attaches between the crankcase vent and the oil return pipe

    PCV Valve - Left Cylinder Bank
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    Rein - Corporate Logo
    T#:45723146
    Part#: 11157563505
    Ships in 3 Business Days
    $ 19.99

    This product was last offered at the strikethrough price on
    04-28-2026

    $ 15.99 USD
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    $ 15.99 USD
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    The Pressure Control Ventilation (PCV) valve is designed to route high-pressure blow-by gases from the crankcase into the intake manifold, relieving excess pressure while recycling gases back into the combustion process. When the PCV valve fails, it can lead to excessive oil consumption, rough idle, and stored engine fault codes. Replacing a worn or faulty valve restores proper crankcase ventilation, smooths out idle, clears codes, and helps keep your engine performing at its best.
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    Crankcase Ventilation Hose
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    URO - Corporate Logo
    T#:373085
    Part#: 11151708801
    Ships in 1 Business Day
    $ 8.03 USD
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    The rubber breather pipes used a number of BMW applications are prone to cracking. Over the years, the engine heat and weather can take their toll and either weaken or cause breaks in these hoses. Your engine begins to run much worse due to massive vacuum leaks.
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    Rein Pressure Regulator Valve Repair Kit - E53, E60, E63, E64, E65, E...
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    Rein - Corporate Logo
    T#:55821694
    Part#: 11127547058
    Ships in 3 Business Days
    New Item
    $ 16.99 USD
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    This Rein Automotive repair kit allows you to service the internal components of the crankcase breather valve independently. Instead of replacing the entire, costly valve cover or manifold assembly, this kit provides the exact wear items required to rebuild the factory housing back to original operating specifications. All components are manufactured to strict OE tolerances. The diaphragm is molded from premium, oil-resistant elastomers engineered to withstand prolonged exposure to aggressive synthetic lubricants, fuel vapors, and extreme under-hood heat cycles without losing its elasticity or sealing profile.
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    Genuine BMW Crankcase Ventilation Hose - Cylinders 1-4
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    Genuine BMW - Corporate Logo
    T#:36550
    Part#: 11617563476
    Ships in 2 Business Days
    4% off MSRP $ 136.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 130.99 USD
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    4% off MSRP
    $ 136.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 130.99 USD
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    Genuine BMW Vent Pipe - Zyl. 1-4
    This item fits the following BMW Chassis:
    E53 48IS,E53 X5,E63,E65

    Fits BMW Engines including:
    N62

    Return Pipe - E46, Z3, Z4
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    Genuine BMW - Corporate Logo
    T#:36176
    Part#: 11537838756
    Ships in 4 Business Days
    1% off MSRP $ 587.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 583.99 USD
    Free Shipping
    1% off MSRP
    $ 587.99

    MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

    $ 583.99 USD
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    Genuine BMW Return Pipe
    This item fits the following BMW Chassis:
    E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

    Fits BMW Engines including:
    S54