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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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Comprehensive Constant Pressure Valve Replacement Kit
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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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E82 135i N54, E9X 335 N54, E60 535 Vargas Upgraded PCV Valve ...
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Vargas Turbo Technologies - Corporate Logo
T#:389684
Part#: VTT-N54-PCV
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$ 68.99 USD
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The crankcase oil vent system on the N52/N54 is one of its weakest and cheaply designed systems. We see crankcase vent issues on even stock engines but with more boost the problems are exponential. This Vargas upgraded PCV valve, and an oil catch can, are what the N54 engine needs and may alleviate most of your oil and boost leak issues. The PCV valve is supposed to let oil either return to the oil pan or pass through the intake manifold and get burned up in the combustion chamber. However, BMW used a weak plastic vent valve that doesn't seal well when under boost. Instead of  closing and venting the oil out of the intake, it's forced through this valve and into the intake and coating your valves with oil residue and carbon. Most boost equals more oil forcing its way by. This upgraded N54 PCV valve uses higher grade materials, including aluminum, to provide a better seal and prevent oil from entering the intake. It's an easy install and a must-have item when considering any turbo work.
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VTT Gen-1 PCV CAP - B58
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Vargas Turbo Technologies - Corporate Logo
T#:4813265
Part#: VTT-B58-PCV-CAP
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$ 149.99 USD
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Vargas has developed a solution to problematic PCV systems! Stock diaphragms on the gen-1 B58 Valve cover are fragile and can crack or tear over time. This can cause loss of crankcase vacuum and smoking. The VTT PCV cap replaces the factory plastic cap with a billet aluminum piece which uses a Billet Banjo fitting, and VTT's Vaccum/Boost adapter to move vacuum directly from the head ports to the manifold. This cap will also allow you to run a catch can on the low side if desired. VTT Recommends using this cap alongside their High Side Catch Can and crankcase breather for maximum efficiency. Installation is as simple as popping the stock cap off, removing the diaphragm, and placing the VTT components in place. Kit Includes: One Billet PCV Cap One Billet Banjo Fitting One Vaccum/Boost adapter One line with built-in check valve
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VTT B58/S58 Cylinder Head Port Block-Off Kit - BMW B58 Gen1/2/3 (B58/...
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Vargas Turbo Technologies - Corporate Logo
T#:49822557
Part#: VTTBS58BLOCK
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The VTT B58/S58 Head Port Block-Off kit is designed to either seal off the factory head ports used by the OEM low-side PCV system. These ports in the cylinder head utilize engine vacuum to evacuate crankcase gases, but in the process, can allow oil to enter the intake manifold, leading to valve carbon buildup and other performance issues over time. The Block-Off kit offered by VTT completely seals the factory head ports to prevent oil intrusion and unwanted vacuum leaks. This kit does NOT require any tapping, meaning no metal to get into the engine, etc. You simply tap the plugs into place. Key Features Eliminates oil draw-through into the intake manifold Prevents carbon buildup on intake valves Utilizes precision-machined plugs for boost sealing Fully reversible — Block-offs can be removed if needed No tapping is required. Easy install, by tapping the blocks into place.
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Crank Case Vent Hose Kit - S63 4.4L Engine
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T#:23913949
Part#: CRNKVENTKITKT
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$ 224.99 USD
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Elevate your S63 4.4L engine's capabilities with our meticulously designed Crank Case Vent Hose Kit. Crafted from premium-grade materials, this kit ensures superior ventilation, mitigating pressure accumulation within the engine, thereby enhancing its overall performance.

Engineered to precise specifications, our kit seamlessly replaces the OEM vent hoses, guaranteeing a perfect fit. By reducing stress on the engine, it prolongs its lifespan and maintains peak functionality. Rely on this kit to provide unparalleled performance and unwavering reliability for your S63 4.4L engine.

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Performance Oil Separator Kit - M52/S52
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T#:51356040
Part#: 059015LA02KT2KT
Ships on Sep 14, 2026
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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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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...
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T#:24344785
Part#: M54OILSEPKT
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$ 133.54 USD
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$ 173.99

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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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Turner Oil Separator Kit - E39 M54
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T#:555298
Part#: 11617501566KT6
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Sale - Save 19% $ 181.99

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

$ 147.02 USD
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Sale - Save 19%
$ 181.99

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$ 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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Billet 1/2" Check Valve - N54
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Vargas Turbo Technologies - Corporate Logo
T#:557954
Part#: VTT-CHECK-1
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$ 36.99 USD
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Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

This is a 1/2" (fits -8AN hos perfectly as well) CNC Billet check valve that can be used for a variety of uses including a vacuum/boost check valve when removing the stock PCV system, and still wanting to run the vacuum to the crankcase. Rated at over 100 psi, with a cracking psi of .25psi.

This part fits the following BMW engines:
2006-2012 N54

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BMW N54 3.0L Billet Vaccum Relief Valve
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Vargas Turbo Technologies - Corporate Logo
T#:597525
Part#: VTT-VAC-RELIEF
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BMW N54 3.0L Billet Vacuum Relief Valve from Vargas Turbo Technologies offers precise control over crankcase vacuum levels. This high-quality billet valve allows users to adjust the vacuum pressure with ease, eliminating guesswork and ensuring optimal engine performance. By simply adding or removing shims, users can tailor the vacuum level to their needs.

  • Customizable Vacuum Levels: Adjust the vacuum pressure using supplied shims to achieve desired performance.
  • Direct Fit: Designed with -10ORB threads for easy installation into VTT modular PCV solutions and VTT Modular CNC valve covers.
  • Versatile Settings: Includes 5 vacuum settings ranging from 10' to 18' of vacuum based on shim configuration.
  • Enhanced Engine Protection: Helps prevent excessive vacuum that could affect engine seals or cause whistling.
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VTT F Series B58 Engine Catch Can - F Chassis B58
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Vargas Turbo Technologies - Corporate Logo
T#:640192
Part#: VTTB58CATCH2
Ships in 10 Business Days
$ 356.99 USD
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This kit uses VTTs popular modular catch can and couples it with a custom CNC 6061 bracket, VTT CNC banjo fittings, VTT 5 ply silicone hose, and Push lock fittings. Install is simple, takes about 30 minutes to 2 hours depending on your skill level, and requires removing one factory hose to install the VTT hoses. Retains OEM fit and finished when installed. This kit stands out from others on the market by using high-quality AN fittings and VTT Banjo adapters. Kit contents: One Catch Can One CNC 6061 bracket Two -10 Low Profile CNC Banjo Fittings Two -10 VTT 5-Ply silicone Vacuum hoses Two -10 Push Lock Fittings Two spring clamps Fits all 2019+ G Series 3/4 BMW vehicles with the B58TU engine. Fits all 2015+ F series BMW vehicles with the B58 engine
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VTT CNC ORB Plug - -10AN
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Vargas Turbo Technologies - Corporate Logo
T#:642075
Part#: VTT-10ORB
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$ 23.99 USD
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$ 23.99 USD
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VTT Modular PCV/Catch Can (Ready to install kits) - BMW N54 3.0L ...
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Vargas Turbo Technologies - Corporate Logo
T#:22361073
Part#: VTT-OCC-2X1
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$ 593.99 USD
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VTT is proud to announce a ground-up system designed to give the end-user complete control over their valve cover/ PCV set up. Tired of being told you will run two -10 lines from your VC to your Catch Can? So were we. Now you can run them any way you want, including complete VTA, oil cap one-way breather, etc.

Nothing on the market comes close to the versatility of this setup, and it truly is the ULTIMATE Valve cover and PCV combo.

This option allows you to purchase a ready-to-install kit with all fittings, hoses, check valve, etc for you to bolt on, and go.

Kit Break down is as follows:

Two Catch Cans

One N54 dual can bracket

Banjo Fittings

Vacuum Adapter fitting for Throttle body

Two Hoses from Valve Cover to Cans

Hose from Low side can to Vaccum Adapter fitting

VTA (Vent to Atmosphere) Breather

Inline Check Valve

NOTE This catch can kit is designed to work with the Vargas Modular Valve Cover only and is not compatible with a stock valve cover.

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Billet Check Valve - 10 Barb
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Vargas Turbo Technologies - Corporate Logo
T#:597641
Part#: VTT-CHECK-2
Ships in 2 Business Days
$ 36.99 USD
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Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!
Flapper Delete Fitting - N54
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Vargas Turbo Technologies - Corporate Logo
T#:557962
Part#: VTT-FLAPPER-DELE
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$ 57.99 USD
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Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

The VTT PCV Flapper delete is used to get rid of the factory flapper, and add a -10 fitting on N54 powered vehicles. This will allow you to run a single or dual external catch can, or your own custom set up.

This fitting is made from 6061-T6 aircraft aluminum anodized black and comes with O-ring, and a stainless steel holding clip.

This part fits the following BMW engines:
2006-2012 N54

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Vargas Billet Valve Cover And Dual Catch Can Combo Kit - Billet Black...
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Vargas Turbo Technologies - Corporate Logo
T#:22394048
Part#: VTTN54VCOCCBLK
Ships in 10 Business Days
$ 2,129.99 USD
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This convenient kit from Vargas includes everything you need, saving you the hassle of sourcing specific fittings for your valve cover-catch can setup. Spend less time searching and more time enjoying your upgraded system!
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Turner Oil Separator Valve Service Kit - E39 M5
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T#:555299
Part#: 11151406788KT3
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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, mounting grommet, and hardware.

Fits the following BMWs:
1998-2003 E39 BMW M5

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Rear Oxygen Sensor Set - N52, N54
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Packaged by Turner - Corporate Logo
T#:55353594
Part#: 11787545074/5KT2
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$ 366.99 USD
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Sluggish oxygen sensors do a lot more than just light up your dashboard with an annoying Check Engine Light—they directly choke your BMW’s performance.

Crankcase Oil Separator and Vent Hose Kit - E90 325xi/330xi, E60 525x...
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T#:221962
Part#: TMS221962
Ships in 3 Business Days
$ 458.99 USD
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The BMW N52 engine was deisgned with a crankcase vent system that relies on a heated oil separator valve to separate vapor from the liquid oil. Under ideal circumstances, the oil vapor would pass back into the intake and get burned up during normal combustion. The liquid oil would follow a path back down into the oil pan and be reused. This system is environmentally friendly but plagued with problems. The heating elements can fail or oil and carbon particles can block the oil separator valve. With no escape, the oil will continue to pool and collect in the valve cover or make its way into the combustion chamber leading to excessive oil consumption, blue smoke from the exhaust, idle and running issues. These issues are worse in colder climates where the freezing temperatures create an oil sludge condition that is impossible to clear. The plastic hoses can become brittle and crack which leads to vacuum leaks and oil leaks. Thankfully, the CCV is replaceable on the early N52 engines (2006 and some 2007 models) and should be inspected during a major service and any time the valve cover is off. Oil can also back up into the throttle body, which is easier to check than the oil separator itself. Later N52 engines do not have a serviceable oil vent as it is integrated into the valve cover and not a separate part.

This is a kit containing the oil separator, the vent hoses, and the intake manifold gaskets that are done during a typical oil separator replacement. Complete kit includes:
  • 11617531423, Genuine BMW oil separator
  • 11617559530, vent hose
  • 11157522931, oil separator hose
  • 11157567801, return hose
  • 11157537701, extraction hose
  • 11617547242, intake manifold gaskets (set of 6)
    The intake manifold must be removed to access the oil separator so new profile gaskets are included. We also recommend (but not required) a new oil separator fitting on the intake manifold because it's one of the heated elements that vaporizes the oil as it enters the intake.

    The oil separator can be replaced on its own but for a complete service we also recommend replacing the oil separator hoses and cleaning the valve cover. Any valve cover or intake manifold work should include a new oil separator valve.

    This kit fits the following BMWs:
    -10/2005 E90 BMW 325xi 330xi - Sedan
    -10/2005 E91 BMW 325xi - Wagon
    -10/2005 E60 BMW 525xi 530xi
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    PCV Adapter Fitting N54
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    Vargas Turbo Technologies - Corporate Logo
    T#:557961
    Part#: VTT-PCV-ADAPTER
    Ships in 10 Business Days
    $ 145.99 USD
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    $ 145.99 USD
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    Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

    This is the adapter fitting that is required to convert your N54 to external PCV if you want to keep your crankcase under vacuum at idle, and anytime you have a vacuum condition in your intake manifold. They are made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip.

    This must be used in conjunction with  the Vargas billet check valve, and PCV delete fitting or requires plugging of the intake PCV ports. Installs inline on the throttle body, and adds a -8AN male to adapt to a catch cans, or any custom set up.

    Made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip

    This part fits the following BMW engines: 
    2006-2012 N54

     

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    VTT S58 Cylinder Head Port Check Valve Kit - S58 3.0L
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    Vargas Turbo Technologies - Corporate Logo
    T#:49822559
    Part#: VTTS58CHECK
    Ships in 10 Business Days
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    $ 69.99 USD
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    The VTT S58 Head Port Check Valve Kit is designed to convert the factory head ports used by the OEM low-side PCV system. These ports in the cylinder head utilize engine vacuum to evacuate crankcase gases, but in the process, can allow oil to enter the intake manifold, leading to valve carbon buildup and other performance issues over time. VTT's Billet Check Valve kit converts the head ports into a robust internal PCV system using precision-engineered check valves. These one-way valves allow vacuum to function as intended while blocking boost pressure from entering the crankcase or charge tract.
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    VTT B58 Cylinder Head Port Check Valve Kit - B58 Gen1/2/3 (B58/B58TU/...
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    Vargas Turbo Technologies - Corporate Logo
    T#:49822558
    Part#: VTTB58CHECK
    Ships in 10 Business Days
    New Item
    $ 69.99 USD
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    $ 69.99 USD
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    The VTT B58 Head Port Check Valve Kit is designed to convert the factory head ports used by the OEM low-side PCV system. These ports in the cylinder head utilize engine vacuum to evacuate crankcase gases, but in the process, can allow oil to enter the intake manifold, leading to valve carbon buildup and other performance issues over time. VTT's Billet Check Valve kit converts the head ports into a robust internal PCV system using precision-engineered check valves. These one-way valves allow vacuum to function as intended while blocking boost pressure from entering the crankcase or charge tract.
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    VTT Low-Profile Crankcase Vent Adapter -16ORB - BMW S58, B58TU ...
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    Vargas Turbo Technologies - Corporate Logo
    T#:51672705
    Part#: VTT-S/B58-LP-CC-
    Ships in 10 Business Days
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    $ 41.99 USD
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    $ 41.99 USD
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    The VTT Low-Profile Crankcase Vent Adapter is the definitive solution for high-boost BMW builds where hood clearance is a premium.
    BorgWarner EGR Valve - F30 F31 F15 F25 F02 F10
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    BorgWarner - Corporate Logo
    T#:44597309
    Part#: 11717810871
    In Stock at Vendor
    $ 293.99

    This product was last offered at the strikethrough price on
    06-24-2026

    $ 291.99 USD
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    $ 291.99 USD
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    The EGR valve regulates how much exhaust gas is recirculated back into the engine’s intake. Rather than allowing all exhaust gases to exit through the tailpipe, it redirects a portion into the cylinders to mix with the incoming air-fuel mixture. By lowering combustion temperatures, this process helps reduce harmful NOx emissions, ensures compliance with emissions standards, and can even contribute to longer engine life in some cases. If your EGR valve fails, replacing it promptly is essential to keep your vehicle running clean and within emissions regulations.
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    Vargas PCV Delete Kit - Cap W/ -10ORB Plug & VTA Catch Can - BMW S55 ...
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    Vargas Turbo Technologies - Corporate Logo
    T#:52164893
    Part#: S55PCVCPCCVTA
    Ships in 10 Business Days
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    $ 399.99 USD
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    $ 399.99 USD
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    The VTT VTA Catch Can Kit is a comprehensive crankcase ventilation solution specifically tailored for the BMW S55 engine.
    Front Oxygen Sensor Set - E9x, E82, E88, Z4
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    Packaged by Turner - Corporate Logo
    T#:55317713
    Part#: BFR1/2O2SKT2
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    $ 323.99 USD
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    Over time, that degradation robs your BMW of its crisp throttle response, tanks your fuel economy, and leaves you staring at a failed emissions ticket
    O2 Sensor Bung and Plug
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    Packaged by Turner - Corporate Logo
    T#:339000
    Part#: TEN9949O2S
    Ships in 6 Business Days
    Starting at $ 12.95 USD
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    Starting at $ 12.95 USD
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    This weld-in bung allows an O2 sensor to be screwed into your exhaust system. It's required for custom exhaust systems, and is also useful for air/fuel ratio measurements when dyno testing.

    Turner Emissions Service Kit - E46 M3
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    Packaged by Turner - Corporate Logo
    T#:555304
    Part#: 11157840446KT9
    Ships on Nov 2, 2026
    $ 413.99

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

    $ 412.99 USD
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    The 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, and hardware.

    Fits the following BMWs:
    09/2004-2006 E46 BMW M3 - Manual Transmission

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    Turner Emissions Service Kit - E46 M3
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    Packaged by Turner - Corporate Logo
    T#:555305
    Part#: 11157840446KT10
    Ships on Nov 2, 2026
    $ 284.99

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

    $ 282.99 USD
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    $ 282.99 USD
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    The 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, and hardware.

    Fits the following BMWs:
    2001-09/2004 E46 BMW M3 - Manual Transmission

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    Turner Oil Separator Kit - E53 X5 M62 4.4L 4.6L
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    Packaged by Turner - Corporate Logo
    T#:555308
    Part#: 11151705237KT1
    Back Ordered
    Sale - Save 6% $ 208.99

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

    $ 197.27 USD
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    Sale - Save 6%
    $ 208.99

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

    $ 197.27 USD
    Free Shipping

    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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