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Oil Separation & Breather System for BMW 3 Series E46 (1999-2005)

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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 (11)

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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

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

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:24344785

Part#: M54OILSEPKT

In Stock

Sale - Save 35% $ 177.99

This product was last offered at the strikethrough price on
11-07-2026

$ 115.41 USD

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Sale - Save 35%

$ 177.99

This product was last offered at the strikethrough price on
11-07-2026

$ 115.41 USD

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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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Genuine BMW Upper Oil Separator Vent Tube

For use in cold climates

T#:13028

Part#: 11617533399

In Stock

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

For vehicles with production date from 01/2000

T#:348236

Part#: 11617504536

In Stock

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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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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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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ECS Tuning Baffled Oil Catch Can - 8oz

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:13496655

Part#: 003779ECS05-02

In Stock

Sale - Save 10% $ 238.99

This product was last offered at the strikethrough price on
11-07-2026

$ 215.09 USD

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Sale - Save 10%

$ 238.99

This product was last offered at the strikethrough price on
11-07-2026

$ 215.09 USD

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Upgrade Your BMW with ECS Baffled Oil Catch Can

Modern emission regulations require a closed PCV/Breather system for cleaner operation. However, inefficient oil particle capture can lead to excessive oil vapor ingestion, causing carbon buildup, reduced performance, and fuel economy. ECS Tuning's updated ECS Baffled Oil Catch Can, now with an easy-to-empty 1/4" drain fitting, is engineered to collect toxic blow-by gases, minimize carbon deposits, and reduce oil contamination within engine oil. Recirculating oil vapor ensures emissions compliance without venting to the atmosphere.

Key Features:
Highly Efficient Oil Separator: Strategically positioned 4 chamber baffle system maximizes oil/air separation and minimizes oil droplets in the intake tract.
Integrated Dipstick: Knurled and black anodized oil dipstick simplifies oil volume inspection.
Reservoir: Available in 6oz or 8oz capacity with a 1/4" NPT drain plug fitting.
Serviceable: Easily removable baffle plates and drain plug for cleaning.
Easy/Customizable Installation: Combine with the ECS Universal Bracket Kit for simplified installation and adjustable mounting locations.
Leak-Free Fittings: Machined -10AN ORB (O-Ring Boss) fittings available for secure connections (fittings sold separately).

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Genuine BMW Crankcase Ventilation Hose

T#:367705

Part#: 11611432559

Ships in 1-2 days

$ 47.99 USD

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$ 47.99 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

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 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

Genuine BMW Upper Oil Separator Vent Tube

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

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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

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

Fits BMW Engines including:
M52,M54

Vacuum Pipe - E46, Z3

T#:42005

Part#: 13531437282

Ships in 8 Business Days

3% off MSRP $ 39.99

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

$ 38.99 USD

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3% off MSRP

$ 39.99

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

$ 38.99 USD

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

Fits BMW Engines including:
M52

Oil Separator Kit - Level 1

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:15710823

Part#: E46M5411_61KT

In Stock

Sale - Save 40% $ 124.99

This product was last offered at the strikethrough price on
11-07-2026

$ 74.97 USD

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Sale - Save 40%

$ 124.99

This product was last offered at the strikethrough price on
11-07-2026

$ 74.97 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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Cold Climate Oil Separator Kit - Level 2

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:15744065

Part#: 114317400450-KT

In Stock

Sale - Save 44% $ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 128.81 USD

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Qty

Sale - Save 44%

$ 231.99

This product was last offered at the strikethrough price on
06-15-2026

$ 128.81 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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Genuine BMW Vent Hose - E46 325Ci, E46 325i

T#:32270

Part#: 11157513756

Ships in 1-2 days

$ 148.91 USD

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$ 148.91 USD

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Genuine BMW Vent Hose -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M56

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

T#:149270

Part#: 64111368684

Ships in 1-2 days

$ 14.99 USD

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$ 14.99 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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