Emissions System for BMW Z Series E36/7 (1996-2002)

Comprehensive Constant Pressure Valve Replacement Kit

T#:557341

Part#: 11111318185TMSKT

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$ 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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Crankcase Vent Hose

T#:30629661

Part#: 11157831311

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05-03-2026

$ 24.47 USD

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Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

For vehicles with production date from 09/1998

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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Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4

For vehicles with production date from 01/2000

T#:641646

Part#: 11617501566S1

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$ 81.59 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 all the components of the oil separator system together to prevent damage to all the aspects of your engine. 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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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

T#:638072

Part#: 11617504536

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

For Model year 1998-2001 only

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

For vehicles with production date up to 09/1998

T#:51356040

Part#: 059015LA02KT2KT

Ships on Oct 5, 2026

Sale - Save 19% $ 104.99

This product was last offered at the strikethrough price on
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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Crankcase Breather Hose - E46 M3 01-04 Z3M - S54

T#:12911

Part#: 11157831311

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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.

$ 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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Leak Detection Pump - Priced Each

For vehicles with production date from 10/2001

T#:35121140

Part#: 16137193479

Ships on Oct 6, 2026

Sale - Save 18% $ 65.99

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$ 54.39 USD

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Crankcase Vent Valve

T#:8741204

Part#: 11157501567

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05-03-2026

$ 21.59 USD

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This valve is also commonly called the PCV valve, and is important to maintain a proper idle. When this valve begins to leak, you will get a large vacuum leak that can cause many problems.

Genuine BMW Crankcase Ventilation Dipstick Hose

For use in cold climates

T#:348228

Part#: 11157532629

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Sale - Save 8% $ 38.99

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

$ 35.88 USD

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Vacuum Control Valve

T#:47850818

Part#: 11747810831

Ships on Sep 28, 2026

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$ 21.21 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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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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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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05-02-2026

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

Fits BMW Engines including:
M44

Oil Separator Hose - E46, Z4

T#:579880

Part#: 55080

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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.

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

T#:640502

Part#: 11617504535

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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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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

For vehicles with production date up to 10/2003

T#:640147

Part#: 11611432559

In Stock

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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

Crankcase Ventilation Hose

For vehicles with production date from 09/1998

T#:30629689

Part#: 11157532649

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05-03-2026

$ 12.23 USD

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02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...

T#:47439371

Part#: 02SB1815

Ships on Feb 17, 2027

Sale - Save 39% $ 3.99

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05-03-2026

$ 2.44 USD

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$ 3.99

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$ 2.44 USD

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Easily add an oxygen sensor to your custom exhaust setup with this universal O2 sensor bung. Designed for simple weld-on installation, it allows you to place your sensor exactly where you need it—perfect for custom builds, exhaust modifications, or performance tuning projects.

Features:

CNC-cut from T304 Stainless Steel for corrosion resistance
Threaded for M18x1.5mm RH oxygen sensors

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Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38

Up to Model Year 09/1998

T#:640144

Part#: 13411733217

Back Ordered

Sale - Save 17% $ 9.99

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05-03-2026

$ 8.25 USD

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This grommet is located on the back side of the PCV or idle control valve

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Emissions System for BMW Z3 (1996-2002)

Sub-Categories

Comprehensive Constant Pressure Valve Replacement Kit

Crankcase Vent Hose

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

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

Performance Oil Separator Kit - M52/S52

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

Leak Detection Pump - Priced Each

Crankcase Vent Valve

Genuine BMW Crankcase Ventilation Dipstick Hose

Vacuum Control Valve

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

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

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

Oil Separator Hose - E46, Z4

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

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

Crankcase Ventilation Hose

02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...

Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38

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