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Oil Separation & Breather System for BMW Z3 (1996-2002)

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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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CCV/PCV Breather Hoses (48)

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Upper Oil Separator Vent Tube

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T#:552486

Part#: 11617533399

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$ 35.99 USD

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Runs from the top of the oil separator up to rear of the intake manifold.

Genuine BMW Vacuum hose

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T#:13024

Part#: 11617503666

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4% off MSRP $ 23.99

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$ 22.99 USD

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$ 23.99

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

$ 22.99 USD

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Genuine BMW Hose Elbow -
This item fits the following BMW Chassis:
E39,E46,E53 X5,E83 X3,E85

Fits BMW Engines including:
M54

Genuine BMW Crankcase Ventilation Hose

For use in cold climates

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T#:19233

Part#: 11617533398

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$ 47.99 USD

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Genuine BMW ENGINE VENT PIPE

Vacuum Pipe - E46, Z3

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T#:42005

Part#: 13531437282

Ships in 8 Business Days

$ 32.99 USD

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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M52

Genuine BMW Vacuum Hose - E36 318ti 318is 318ic 318i M44 1.9L ...

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T#:37499

Part#: 11731435862

Special Order: No Guaranteed ETA

Sale - Save 24% $ 29.99

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$ 22.93 USD

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$ 29.99

This product was last offered at the strikethrough price on
05-02-2026

$ 22.93 USD

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Genuine BMW Hose - 470mm
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44

Crankcase Oil Separator Valve - E46 E39 E60 X3 X5 Z3 Z4

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T#:2855

Part#: 11617501566

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$ 48.99 USD

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This Crankcase Oil Separator Valve fits BMWs with the M52tu 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. It is fairly common for this valve to become plugged with sludge which can create rough idle and excessive oil consumption.
Since the late 1800’s Febi has been fabricating replacement metal parts. This history is self evident in the quality and vast amount of applications they service. With more than 34,000 repair solutions for cars and commercial vehicles you can be sure Febi has you covered.

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 525i 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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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

For vehicles with production date up to 10/2003

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T#:640147

Part#: 11611432559

In Stock

Sale - Save 22% $ 23.99

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

$ 18.76 USD

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Sale - Save 22%

$ 23.99

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

$ 18.76 USD

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

Genuine BMW Mounting Grommet

Up to Model Year 09/1998

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T#:360723

Part#: 13411733217

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$ 17.86 USD

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$ 17.86 USD

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Crankcase Ventilation Hose - E46 M3 Z3M Coupe S54

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T#:25109076

Part#: 11157831311

Ships on Aug 4, 2026

$ 17.99 USD

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$ 17.99 USD

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This hose runs from the oil separator to the intake manifold and is designed to allow the recirculation of built-up oil vapors.

Due to its proximity to engine heat, this hose tends to get brittle and break as it ages. This can lead to oil leaks, vacuum leaks, misfires, and more.

If your crankcase ventilation hose is brittle or leaking, replace it with this unit from URO Parts.

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Rein PCV Hose - E36, Z3

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T#:379766

Part#: 11151740393

In Stock at Vendor

$ 9.99

This product was last offered at the strikethrough price on
03-24-2026

$ 7.19 USD

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$ 7.19 USD

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Attaches the PCV to the oil dipstick tube

Engine Vent Hose 11151740393

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T#:6703

Part#: 11151740393

Ships on Oct 5, 2026

$ 5.89 USD

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ENGINE VENT HOSE 11151740393

BMW Crankcase Pressure Regulator Valve

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T#:46478579

Part#: ABH0263

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$ 23.99 USD

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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 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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- CCV/PCV Breather Hoses (48)

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