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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 (17)

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Crankcase Vent Hose - From Valve Cover to Oil Separator - E36 E39 Z3 ...

T#:6690

Part#: 11151703775

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$ 31.99 USD

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This Crankcase Vent Hose - From Valve Cover to Oil Separator fits BMWs with the M52 or S52 6 cylinder engines.
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.

This item fits the following BMWs:
1996-1998 E36 BMW 323is 323ic 328i 328is 328ic M3
1996-1998 E36/7 BMW Z3 2.8
1996-2000 E36/7 BMW M Roadster M Coupe
1997-1998 E39 BMW 525i 528i 530i 540i M5

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Performance Oil Separator Kit - M52/S52

For vehicles with production date up to 09/1998

10X Entries Into Our F80 M3 Sweepstakes

T#:51356040

Part#: 059015LA02KT2KT

In Stock

Sale - Save 19% $ 104.99

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

$ 85.28 USD

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Sale - Save 19%

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$ 85.28 USD

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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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Genuine BMW Vacuum hose

T#:13024

Part#: 11617503666

In Stock

$ 23.99 USD

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$ 23.99 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

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

For vehicles with production date from 01/2000 For vehicles with production date up to 01/2000

10X Entries Into Our F80 M3 Sweepstakes

T#:638072

Part#: 11617504536

In Stock

Sale - Save 20% $ 26.99

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

$ 21.59 USD

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Sale - Save 20%

$ 26.99

This product was last offered at the strikethrough price on
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$ 21.59 USD

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This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. 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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Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

For vehicles with production date from 09/1998

10X Entries Into Our F80 M3 Sweepstakes

T#:640207

Part#: 11617501566

In Stock

Sale - Save 20% $ 32.99

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

$ 26.39 USD

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Sale - Save 20%

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$ 26.39 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. 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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Genuine BMW Upper Oil Separator Vent Tube

For use in cold climates

T#:13028

Part#: 11617533399

Ships in 1-2 days

2% off MSRP $ 42.99

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

$ 41.99 USD

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2% off MSRP

$ 42.99

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

$ 41.99 USD

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GENUINE BMW CONNECTING LINE:111060

Genuine BMW Crankcase Ventilation Hose

For vehicles with production date up to 10/2003

T#:367705

Part#: 11611432559

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$ 47.99 USD

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$ 47.99 USD

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Crankcase Breather Hose - E46 M3 01-04 Z3M - S54

T#:12911

Part#: 11157831311

Ships in 1-2 days

2% off MSRP $ 102.99

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

$ 100.99 USD

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2% off MSRP

$ 102.99

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

$ 100.99 USD

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This hose directs the oil & combustion vapors from the valve cover and directs them to the intake manifold where they are put through combustion again in order to reduce emissions. We recommend replacing this hose when replacing the oil separator #11157840446.

This item fits the following BMWs:
2001-2004 E46 BMW M3
2001-2002 Z3 BMW M Roadster M Coupe

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Genuine BMW Return Pipe - 11617504536 - E46 E39 E53 E60 E83 Z3 Z4 M52...

For vehicles with production date from 01/2000 For vehicles with production date up to 01/2000

T#:348236

Part#: 11617504536

Ships in 1-2 days

2% off MSRP $ 43.99

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

$ 42.99 USD

Add to Wish List

Qty

2% off MSRP

$ 43.99

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

$ 42.99 USD

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Part of the vacuum and emissions system that runs from the intake manifold back to the connecting hose.
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.

Fits the following BMW's:
E46 M52 (from 01/2000) and M54
E39 M52 (from 01/2000) and M54
E53 M54
E60 M54
E83 M54
Z3 M52 (up to 01/2000 for 2.3L and from 01/2000 for 2.8L) and M54
Z4 M54

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Bav Auto Vent Hose - From Valve Cover to Oil Separator - E36 E39 Z3 ...

For Model year 1998-2001 only

10X Entries Into Our F80 M3 Sweepstakes

T#:579869

Part#: 54546

In Stock

Sale - Save 20% $ 26.99

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

$ 21.59 USD

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Qty

Sale - Save 20%

$ 26.99

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

$ 21.59 USD

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Genuine BMW Crankcase Ventilation Dipstick Hose

For use in cold climates

T#:348228

Part#: 11157532629

Ships in 1-2 days

$ 39.99 USD

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$ 39.99 USD

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Genuine BMW Crankcase Ventilation Hose

For vehicles with production date from 09/1998

T#:367590

Part#: 11157532649

Ships in 1-2 days

$ 39.99 USD

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$ 39.99 USD

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Genuine BMW Upper Oil Separator Vent Tube

For vehicles with production date up to 10/2003 For vehicles with production date from 01/2000

T#:7025

Part#: 11617504535

Ships in 1-2 days

2% off MSRP $ 42.99

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

$ 41.99 USD

Add to Wish List

Qty

2% off MSRP

$ 42.99

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

$ 41.99 USD

Add to Wish List

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

Fits BMW Engines including:
M52,M54

Genuine BMW Crankcase Ventilation Hose

For use in cold climates

T#:19233

Part#: 11617533398

Ships in 1-2 days

$ 47.99 USD

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$ 47.99 USD

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Genuine BMW ENGINE VENT PIPE

Vacuum Pipe - E46, Z3

T#:42005

Part#: 13531437282

Ships in 1-2 days

$ 32.99 USD

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$ 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 ...

T#:37499

Part#: 11731435862

Ships in 6 Business Days

Sale - Save 24% $ 29.99

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

$ 22.93 USD

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Qty

Sale - Save 24%

$ 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

Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

For vehicles with production date up to 10/2003 For vehicles with production date from 01/2000

10X Entries Into Our F80 M3 Sweepstakes

T#:640502

Part#: 11617504535

In Stock

Sale - Save 20% $ 24.99

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

$ 19.99 USD

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Qty

Sale - Save 20%

$ 24.99

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

$ 19.99 USD

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Runs from the top of the oil separator up to rear of the intake manifold. 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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Genuine BMW Mounting Grommet

Up to Model Year 09/1998

T#:360723

Part#: 13411733217

In Stock

$ 17.86 USD

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Qty

$ 17.86 USD

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Oil Separator Hose - E46, Z4

10X Entries Into Our F80 M3 Sweepstakes

T#:579880

Part#: 55080

In Stock

Sale - Save 20% $ 24.99

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

$ 19.99 USD

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Qty

Sale - Save 20%

$ 24.99

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

$ 19.99 USD

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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.

Oil Separator Kit - Level 1

10X Entries Into Our F80 M3 Sweepstakes

T#:15710823

Part#: E46M5411_61KT

In Stock

Sale - Save 24% $ 123.99

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

$ 93.71 USD

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Qty

Sale - Save 24%

$ 123.99

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

$ 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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Vacuum Hose - E24, E28, E3, E30, E32, E34, E46, Z3

T#:149270

Part#: 64111368684

Ships in 1-2 days

8% off MSRP $ 12.99

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

$ 11.99 USD

Add to Wish List

Qty

8% off MSRP

$ 12.99

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

$ 11.99 USD

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Genuine BMW Vacuum Hose White - 2X4
This item fits the following BMW Chassis:
E30 M3,E34 M5,E46 M3,E30,E34,E46

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