Emissions System

Comprehensive Constant Pressure Valve Replacement Kit

T#:557341

Part#: 11111318185TMSKT

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05-03-2026

$ 84.32 USD

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When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem.

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking.

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Fuel Tank Breather Valve

T#:25075803

Part#: 13907643106

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

$ 55.19 USD

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Genuine BMW PCV Breather Hose - E36 318ti 318is 318ic 318i M42 1.8L ...

T#:367581

Part#: 11151247743

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$ 35.88 USD

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06-15-2026

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Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

T#:640207

Part#: 11617501566

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05-03-2026

$ 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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Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

T#:638072

Part#: 11617504536

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05-03-2026

$ 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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Vent Pipe With Dust Filter - F30, F31, F32, F33, F34, F36

T#:222893

Part#: 16137438487

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$ 104.79 USD

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Genuine Bmw Vent Pipe With Dust Filter - 16137438487

Genuine BMW Extraction Line - E60 E91 E90 E91 N52 3.0L, Z4 N52 3.0L ...

T#:22212

Part#: 11157537701

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$ 52.95 USD

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Genuine BMW Extraction Line -
This item fits the following BMW Chassis:
E85,E86,E90

Fits BMW Engines including:
N52

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

T#:579869

Part#: 54546

Ships on Aug 11, 2026

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$ 21.59 USD

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Performance Oil Separator Kit - M52/S52

T#:51356040

Part#: 059015LA02KT2KT

Ships on Oct 5, 2026

Sale - Save 19% $ 104.99

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05-03-2026

$ 84.77 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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Vacuum Pipe

T#:37159

Part#: 11667575774

Ships in 1-2 days

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$ 39.90 USD

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$ 42.00

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06-25-2026

$ 39.90 USD

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Genuine BMW Vacuum Pipe -
This item fits the following BMW Chassis:
E71,E82,E90,E92,E93,F06,F10,F12,F13,F15,F16

Fits BMW Engines including:
N55

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

T#:24344785

Part#: M54OILSEPKT

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05-03-2026

$ 133.54 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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Crankcase Breather Hose - E46 M3 01-04 Z3M - S54

T#:12911

Part#: 11157831311

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$ 92.05 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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Vacuum Pipe - F22, F23, F30, F31, F32, F33, F34, F36, F87

T#:177071

Part#: 11667613026

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Sale - Save 7% $ 42.00

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$ 38.85 USD

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Genuine BMW Vacuum Pipe With Non-Return Valve -
This item fits the following BMW Chassis:
F22,F30,F31,F32,F33,F34,F36

Fits BMW Engines including:
N20,N26,N55

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Genuine BMW Crankcase Ventilation Dipstick Hose

T#:348228

Part#: 11157532629

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$ 35.88 USD

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Genuine BMW Rear Manifold Oxygen Sensor - Front Position/Pre-Cat - E4...

T#:367734

Part#: 11781405324

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Sale - Save 8% $ 395.99

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

$ 365.75 USD

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$ 395.99

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$ 365.75 USD

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Genuine MINI Activated Charcoal Filter - R55 R56 R57 R58 R59 ...

T#:22484

Part#: 16132757327

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Sale - Save 7% $ 305.12

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

$ 282.24 USD

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$ 282.24 USD

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Genuine MINI ACTIVATED CHARCOAL FILTER
Fits BMW Engines including:
N12,N14,N16,N18

Turner Oil Separator Kit - E39 M54

T#:555298

Part#: 11617501566KT6

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

$ 147.02 USD

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The plastic hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
2000-2003 E39 BMW 530i

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Bav Auto Crank Case Ventilation Valve - E31 E38 E39 M62 4.4L ...

T#:640206

Part#: 11617501563

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05-03-2026

$ 38.39 USD

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An integral part of the emissions system, the PCV valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes, and poor idle. 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 Front Manifold Oxygen Sensor - Front Position/Pre-Cat - Z...

T#:367749

Part#: 11781743994

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Sale - Save 8% $ 377.99

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

$ 349.58 USD

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$ 349.58 USD

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Genuine MINI Oxygen Sensor

T#:14672

Part#: 11787548961

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

$ 232.78 USD

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$ 245.03

This product was last offered at the strikethrough price on
06-25-2026

$ 232.78 USD

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Genuine MINI LAMBDA MONITOR SENSOR
Fits BMW Engines including:
N12,N14,N16,N18,N51

Genuine BMW Exhaust Backpressure Sensor - E90 E70

T#:42679

Part#: 13627808013

Ships in 1-2 days

Sale - Save 6% $ 110.99

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

$ 104.88 USD

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$ 104.88 USD

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Genuine BMW Exhaust Pressure Sensor -
This item fits the following BMW Chassis:
E70 X5,E90

Fits BMW Engines including:
M57

Genuine BMW SCR Line - F25 X3 xDrive28d

T#:194487

Part#: 16197286301

Ships in 1-2 days

Sale - Save 8% $ 360.99

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

$ 333.33 USD

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$ 360.99

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

$ 333.33 USD

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Genuine BMW Metering Line -
This item fits the following BMW Chassis:
F25 X3

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

T#:37499

Part#: 11731435862

Special Order: No Guaranteed ETA

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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$ 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 Intake Manifold Cover w/ PCV Valve - BMW E31 E32 E34 E38 M6...

T#:639843

Part#: 11617501562

Special Order: No Guaranteed ETA

Sale - Save 15% $ 59.99

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

$ 50.99 USD

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An integral part of the emissions system, the PVC valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. Often split from underhood heat and age, this vents excess oil into the engine compartment. 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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Covering Outer - E36

T#:45102

Part#: 16131183047

Special Order: No Guaranteed ETA

Sale - Save 11% $ 30.99

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

$ 27.58 USD

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$ 30.99

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

$ 27.58 USD

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Genuine BMW Covering Outer - Akf/Run.Loss
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44,M50,M52,S52

Pressure Control Valve (PCV) Repair Kit

T#:24079614

Part#: 11121025447

In Stock

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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$ 288.99

This product was last offered at the strikethrough price on
06-25-2026

$ 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

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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$ 24.99

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

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

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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$ 24.99

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$ 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 Vent Hose - E46 325Ci, E46 325i

T#:32270

Part#: 11157513756

Ships in 3 Business Days

Sale - Save 16% $ 177.99

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

$ 148.91 USD

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Sale - Save 16%

$ 177.99

This product was last offered at the strikethrough price on
05-14-2026

$ 148.91 USD

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

Fits BMW Engines including:
M56

Turner Oil Separator Kit - E53 X5 M62 4.4L 4.6L

T#:555308

Part#: 11151705237KT1

Back Ordered

Sale - Save 6% $ 208.99

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

$ 196.41 USD

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Sale - Save 6%

$ 208.99

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

$ 196.41 USD

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The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, and hardware.

Fits the following BMWs:
1999-2006 E53 BMW with M62 4.4L 4.6L

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