Home
Engine Parts
Emissions System
Oil Separation & Breather System

Genuine BMW Oil Separation & Breather System for BMW E46 M3 S54 (1999-2005)

Clear BMW chassis

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.

Sub-Categories

CCV/PCV Breather Hoses (5)

Sort By:

Genuine BMW Vent Hose - 11617831930 - E46,E85,E46 M3,E85 Z4M ...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:14624

Part#: 11617831930

In Stock

2% off MSRP $ 127.99

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

$ 124.99 USD

Add to Wish List

Qty

2% off MSRP

$ 127.99

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

$ 124.99 USD

Add to Wish List

Vents gases from the crankcase back into the intake.
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.

Genuine BMW Vent Hose
This item fits the following BMW Chassis:
E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

Fits BMW Engines including:
S54

Show More Show Less

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:12911

Part#: 11157831311

In Stock

Sale - Save 8% $ 99.99

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

$ 92.05 USD

Add to Wish List

Qty

Sale - Save 8%

$ 99.99

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

$ 92.05 USD

Add to Wish List

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

Show More Show Less

Genuine BMW Emissions Service Kit - E46 M3

For vehicles with manual transmission only and production date up to 09/2004

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:375194

Part#: 11157840446KT1

In Stock

$ 392.99

This product was last offered at the strikethrough price on
07-06-2026

$ 390.99 USD

Add to Wish List

Qty

$ 390.99 USD

Add to Wish List

Genuine BMW Emissions Service Kit - E46 M3

For vehicles with manual transmission only and production date up to 09/2004

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:375196

Part#: 11157840446KT3

In Stock

$ 397.99

This product was last offered at the strikethrough price on
07-06-2026

$ 395.99 USD

Add to Wish List

Qty

$ 395.99 USD

Add to Wish List

Genuine BMW PCV Pipe - E46 M3

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:36621

Part#: 11617832298

Special Order: No Guaranteed ETA

3% off MSRP $ 72.99

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

$ 70.99 USD

Add to Wish List

Qty

3% off MSRP

$ 72.99

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

$ 70.99 USD

Add to Wish List

Genuine BMW Pipe
This item fits the following BMW Chassis:
E46 M3,E46

Fits BMW Engines including:
S54

Return Pipe - E46, Z3, Z4

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

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

Add to Wish List

Qty

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

Add to Wish List

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

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

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:149270

Part#: 64111368684

Ships in 2 Business 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

Add to Wish List

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

Genuine BMW Emissions Service Kit - E46 M3

For vehicles with SMG gearbox and production date up to 09/2004

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:577309

Part#: 11157840446KT5

Back Ordered

$ 613.99 USD

Add to Wish List

Qty

$ 613.99 USD

Add to Wish List

Select Vehicle

Category

Oil Separation & Breather System
- CCV/PCV Breather Hoses (5)

Brand

Price

Special Offers

On Sale (1)

Shipping