Emissions System for BMW Z3 (1996-2002)

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Is your BMW throwing emissions related codes? While we're primarily a BMW performance parts house, we understand the importance of maintaining your emissions system to pass inspection in your area and keep your check engine light off. Pick up your emissions related parts from Turner Motorsport.

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Comprehensive Constant Pressure Valve Replacement Kit
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T#:557341
Part#: 11111318185TMSKT
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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
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T#:30629661
Part#: 11157831311
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Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4
For vehicles with production date from 01/2000
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T#:641646
Part#: 11617501566S1
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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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Crankcase Ventilation Hose Kit M54 Engine
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Rein - Corporate Logo
T#:379190
Part#: 11617504535K
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Turner Motorsport presents the Crankcase Ventilation System Refresh Kit for BMW owners experiencing malfunctioning or aged CCV systems. This comprehensive kit includes all necessary hoses to complete a refresh, ensuring optimal performance and reliability for your BMW's CCV system.

  • Addresses malfunctioning CCV systems
  • Ensures proper ventilation of the crankcase
  • Comprehensive kit includes all necessary hoses
  • Restores performance and reliability
  • Compatible with various BMW models
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Performance Oil Separator Kit - M52/S52
For vehicles with production date up to 09/1998
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T#:51356040
Part#: 059015LA02KT2KT
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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
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Genuine BMW - Corporate Logo
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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Leak Detection Pump - Priced Each
For vehicles with production date from 10/2001
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Bremmen Parts - Corporate Logo
T#:35121140
Part#: 16137193479
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Vacuum Control Valve
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T#:47850818
Part#: 11747810831
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Crankcase Vent Valve
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T#:8741204
Part#: 11157501567
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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 Rear Manifold Oxygen Sensor - Front Position/Pre-Cat - E4...
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Genuine BMW - Corporate Logo
T#:367734
Part#: 11781405324
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$ 365.75 USD
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Genuine BMW Front Manifold Oxygen Sensor - Front Position/Pre-Cat - Z...
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T#:367749
Part#: 11781743994
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Genuine BMW Crankcase Ventilation Dipstick Hose
For use in cold climates
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Genuine BMW - Corporate Logo
T#:348228
Part#: 11157532629
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Crankcase Vent Valve - E36 318i/is/ti, Z3 1.9
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Rein - Corporate Logo
T#:7968540
Part#: 11157501567
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This crank case vent valve (CCV) / oil separator / PCV valve helps to trap oil from the crank case. If this unit becomes plugged or develops a leak it can lead to rough idle or driveability issues. This item fits the following BMWs: 1992-1998 E36 BMW 318i 318is 318ti 318ic 1997-2002 Z3 BMW Z3 1.9
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Upper Oil Separator Vent Tube
For vehicles with production date up to 10/2003 For vehicles with production date from 01/2000
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Rein - Corporate Logo
T#:378292
Part#: 11617504535
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Runs from the top of the oil separator up to intake manifold.
Upper Oil Separator Vent Tube
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Rein - Corporate Logo
T#:552486
Part#: 11617533399
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$ 34.19 USD
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Runs from the top of the oil separator up to rear of the intake manifold.

Genuine BMW Vacuum Hose - E36 318ti 318is 318ic 318i M44 1.9L ...
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Genuine BMW - Corporate Logo
T#:37499
Part#: 11731435862
Special Order: No Guaranteed ETA
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Genuine BMW Hose - 470mm
This item fits the following BMW Chassis:
E36

Fits BMW Engines including:
M44


Rein Air Pump Hose - Z3
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T#:592970
Part#: 11721432867
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Replace your leaking emissions hose
Crankcase Ventilation Hose
For vehicles with production date from 09/1998
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Bremmen Parts - Corporate Logo
T#:30629689
Part#: 11157532649
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BMW Crankcase Pressure Regulator Valve
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Rein - Corporate Logo
T#:46478579
Part#: ABH0263
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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.
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Rein - Crankcase Vent Hose E46 Z3 M Roadster, E46 Z3 M Coupe ...
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Rein - Corporate Logo
T#:34181269
Part#: 11157831311
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$ 11.11 USD
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Crankcase Vent Hose ABV0329 is an essential component designed for BMW engines, ensuring optimal performance of the crankcase ventilation system. This high-quality vent hose plays a critical role in regulating and redirecting excess gases from the crankcase back into the engine's intake, reducing harmful emissions and preventing pressure buildup. Crankcase Vent Hose ABV0329 helps maintain engine efficiency and protects against potential damage caused by over-pressurization or oil leaks.

Made from durable, heat-resistant materials, this hose is built to withstand the high temperatures and pressures common in BMW engines. It is a direct-fit replacement, making installation simple and efficient for both professionals and DIY mechanics. Available from Turner Motorsport, Crankcase Vent Hose ABV0329 is the perfect solution for restoring and maintaining your BMW’s crankcase ventilation system.

Key Benefits:

  • Ensures proper crankcase ventilation for optimal engine performance
  • Reduces harmful emissions by redirecting excess gases into the intake
  • Prevents pressure buildup and protects against oil leaks
  • Constructed from durable, heat-resistant materials for long-lasting reliability
  • Direct-fit replacement, ensuring easy installation for various BMW models
  • Available from Turner Motorsport, a trusted source for BMW performance parts
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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
For vehicles with production date up to 10/2003
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Bremmen Parts - Corporate Logo
T#:640147
Part#: 11611432559
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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine

Rein PCV Hose - E36, Z3
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Rein - Corporate Logo
T#:379766
Part#: 11151740393
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$ 6.99 USD
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Attaches the PCV to the oil dipstick tube
Rein Return Pipe - E39, E46, E53, E60, E83, Z3, Z4
For vehicles with production date from 09/1998 For vehicles with production date from 01/2000
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Rein - Corporate Logo
T#:375092
Part#: 11617504536
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$ 18.99 USD
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Runs from the intake manifold back to connecting hose
Hose - From Oil Separator to Oil Dipstick Tube - E46 E39
For use in cold climates
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Rein - Corporate Logo
T#:2879
Part#: 11157532629
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$ 10.44 USD
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This is the updated hose that goes from the Crankcase Oil Separator Valve to the oil dipstick tube. This tube tends to get plugged with oil sludge and becomes brittle and cracks. It fits E46 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi - E39 525i 530i - E60 525i 530i 2004-2005 - X3 2.5i 3.0i 2004-2006 - Z3 2.5i 3.0i - Z4 2.5i 3.0i 2003-2006.
In german, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2001-2005 E46 BMW 325i 325ci 325xi Only for cars with M54 engine
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2001-2002 Z3 BMW Z3 2.5i Z3 3.0i
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i
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Upper Oil Separator Vent Tube
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Rein - Corporate Logo
T#:384805
Part#: 11611440317
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This product was last offered at the strikethrough price on
06-29-2026

$ 19.29 USD
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Rein Crankcase Ventilation Hose - E39, E46, E60, E83, Z3, Z4 ...
For vehicles with production date from 09/1998
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Rein - Corporate Logo
T#:359420
Part#: 11157532649
In Stock
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$ 11.39 USD
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ENGINE VENT HOSE 11157532649
02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...
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Bremmen Parts - Corporate Logo
T#:47439371
Part#: 02SB1815
Ships on Feb 1, 2027
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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
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Bremmen Parts - Corporate Logo
T#:640144
Part#: 13411733217
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This grommet is located on the back side of the PCV or idle control valve