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Emissions System

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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Bavarian Autosport - Corporate Logo
T#:25075803
Part#: 13907643106
In Stock
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05-03-2026

$ 55.19 USD
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ECS - Corporate Logo
T#:383333
Part#: 003779ECS06KT
In Stock
Sale - Save 25% $ 95.99

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06-13-2026

$ 71.99 USD
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If you don't wish to fabricate intricate brackets to mount your ECS Baffled Oil Catch Can we have the solution. ECS's three-piece bracket kit includes two options for securing the catch can. Choose from either a flat parallel mounting plate or a bent 90° mounting plate to give you 360° rotation for an infinitely adjustable mounting location.
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Bavarian Autosport - Corporate Logo
T#:640207
Part#: 11617501566
In Stock
Sale - Save 20% $ 32.99

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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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Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships on Oct 5, 2026
New Item
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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Sale - Save 19%
$ 104.99

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$ 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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Bavarian Autosport - Corporate Logo
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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Bavarian Autosport - Corporate Logo
T#:579869
Part#: 54546
In Stock
Sale - Save 20% $ 26.99

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

$ 21.59 USD
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Sale - Save 20%
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This product was last offered at the strikethrough price on
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Packaged by Turner - Corporate Logo
T#:24344785
Part#: M54OILSEPKT
In Stock
Sale - Save 23% $ 173.99

This product was last offered at the strikethrough price on
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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ECS - Corporate Logo
T#:13496655
Part#: 003779ECS05-02
In Stock
Sale - Save 10% $ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD
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Sale - Save 10%
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$ 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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Bavarian Autosport - Corporate Logo
T#:640206
Part#: 11617501563
In Stock
Sale - Save 20% $ 47.99

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

$ 38.39 USD
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Sale - Save 20%
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This product was last offered at the strikethrough price on
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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ECS - Corporate Logo
T#:583470
Part#: 003779ECS11
In Stock
Sale - Save 25% $ 71.99

This product was last offered at the strikethrough price on
06-14-2026

$ 53.99 USD
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$ 71.99

This product was last offered at the strikethrough price on
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$ 53.99 USD
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Make draining your ECS or Turner Catch Can simple with this comprehensive kit
Bavarian Autosport - Corporate Logo
T#:639843
Part#: 11617501562
Special Order: No Guaranteed ETA
Sale - Save 15% $ 59.99

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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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Bavarian Autosport - Corporate Logo
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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Sale - Save 20%
$ 24.99

This product was last offered at the strikethrough price on
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$ 19.99 USD
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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.


Bavarian Autosport - Corporate Logo
T#:640502
Part#: 11617504535
In Stock
Sale - Save 20% $ 24.99

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05-03-2026

$ 19.99 USD
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This product was last offered at the strikethrough price on
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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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Packaged by Turner - Corporate Logo
T#:15677538
Part#: 11617533344-KT
In Stock
Sale - Save 25% $ 162.99

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

$ 122.12 USD
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$ 162.99

This product was last offered at the strikethrough price on
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$ 122.12 USD
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A bad DISA valve can cause a variety of issues, from a loud racket in the engine bay, hesitation at low rpm and a rough idle with lean codes. If the valve is making a loud noise, we recommend replacing it as soon as possible. It is possible for the pin holding the flap to be sucked into the motor causing serious damage. Very easy to replace, just need to undo the 4 bolts holding it to the intake manifold. Includes new mounting hardware
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ECS - Corporate Logo
T#:637408
Part#: 028092ECS11AKT
In Stock
Sale - Save 25% $ 3.99

This product was last offered at the strikethrough price on
06-14-2026

$ 2.99 USD
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$ 3.99

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$ 2.99 USD
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Upgrade your exhaust system with the Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm). This high-quality weld bung is made from stainless steel, ensuring durability and resistance to corrosion. It features M18x1.5mm threads, making it compatible with most oxygen sensors. Perfect for custom exhaust setups or replacing damaged bungs, this weld bung is a must-have for any automotive enthusiast.

  • Made from high-quality stainless steel for durability and corrosion resistance
  • M18x1.5mm threads ensure compatibility with most oxygen sensors
  • Ideal for custom exhaust setups or replacing damaged bungs
  • Essential for automotive enthusiasts looking to upgrade their exhaust system
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ECS - Corporate Logo
T#:33412930
Part#: 12521706096
In Stock
Sale - Save 11% $ 10.99

This product was last offered at the strikethrough price on
06-14-2026

$ 9.78 USD
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Includes connector housing with terminals and seals. Commonly used for the idle air control valve (IACV).

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521706096 - Commonly used for the idle air control valve (IACV).

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Packaged by Turner - Corporate Logo
T#:15710823
Part#: E46M5411_61KT
In Stock
Sale - Save 24% $ 123.99

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

$ 93.71 USD
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Sale - Save 24%
$ 123.99

This product was last offered at the strikethrough price on
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$ 93.71 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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Packaged by Turner - Corporate Logo
T#:56291074
Part#: 11158636540KT2
In Stock
New Item
$ 429.67 USD
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If your BMW is burning oil, showing unmetered air faults, or suffering from degraded throttle response, a compromised breather system is usually the culprit. The N63 Crankcase Breather Package pairs Genuine BMW oil separators with OE tier Rein connecting pipes. Designed to restore factory level oil separation and sealed vacuum integrity across both cylinder banks
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Packaged by Turner - Corporate Logo
T#:15744065
Part#: 114317400450-KT
In Stock
Sale - Save 41% $ 231.99

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

$ 137.46 USD
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Sale - Save 41%
$ 231.99

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

$ 137.46 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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ECS - Corporate Logo
T#:388889
Part#: N1.50X051
In Stock
Sale - Save 25% $ 5.99

This product was last offered at the strikethrough price on
06-13-2026

$ 4.49 USD
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$ 5.99

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$ 4.49 USD
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1.5mm X 51mm Metric Buna-N 70 O-ring is the perfect sealing solution for various industrial applications. Made from high-quality Buna-N material, this O-ring provides reliable sealing performance, ensuring leak-free connections. With its metric sizing and 70 durometer hardness, it offers versatility and durability for a wide range of uses.

  • High-quality Buna-N material
  • Reliable sealing performance
  • Metric sizing for versatility
  • 70 durometer hardness for durability
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Packaged by Turner - Corporate Logo
T#:15744026
Part#: 11611437453-KT
In Stock
$ 173.13 USD
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Located in the intake system, this part is a common source of idle issues. This kit includes a new mount and idle control valve grommet