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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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Febi - Corporate Logo
T#:6707
Part#: 11157532649
In Stock at Vendor
$ 19.12

This product was last offered at the strikethrough price on
05-29-2026

$ 17.04 USD
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$ 17.04 USD
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ENGINE VENT HOSE 11157532649
Oil Return Hose
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URO - Corporate Logo
T#:592793
Part#: 11157560068
Ships in 1 Business Day
$ 9.99 USD
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Hose that attaches between the crankcase vent and the oil return pipe
Pressure Regulator Valve Repair Kit
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URO - Corporate Logo
T#:600041
Part#: 11127547058
Ships in 1 Business Day
$ 14.99 USD
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OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52
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Rein - Corporate Logo
T#:402020
Part#: 11617522933
Ships in 1 Business Day
$ 19.99 USD
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If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.
Crankcase Ventilation Dipstick Hose - BMW M52TU M54
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URO - Corporate Logo
T#:359570
Part#: 11157532629
Ships in 1 Business Day
$ 12.99 USD
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This tube runs from the oil separator to the lower dipstick tube.

 

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 Ventilation Hose - Cylinders 1-4
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Rein - Corporate Logo
T#:17738390
Part#: 11617563476
Ships in 3 Business Days
$ 46.99 USD
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$ 46.99 USD
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Manufactured with high-quality materials to withstand heat, dirt, and debris, matching OE expectations.
Secondary Air Injection Pump
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URO - Corporate Logo
T#:639220
Part#: 11721437911
Ships in 1 Business Day
$ 130.66 USD
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Keep your engine running efficiently

Dinan - Corporate Logo
T#:398512
Part#: D401-0014
Ships in 5 Business Days
Sale - Save 10% $ 95.99

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

$ 86.30 USD
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Sale - Save 10%
$ 95.99

This product was last offered at the strikethrough price on
07-31-2026

$ 86.30 USD
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Replacement filter that is found on the back of the air pump housing.

Rein Crank Case Ventilation Valve
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Rein - Corporate Logo
T#:17704764
Part#: 11158647298
In Stock at Vendor
$ 61.80 USD
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Designed to be a direct fit for OEM hoses, Rein has replacements for an affordable cost.
Denso - Corporate Logo
T#:1196208
Part#: 11787540166
In Stock at Vendor
$ 205.99

This product was last offered at the strikethrough price on
05-07-2026

$ 199.99 USD
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$ 199.99 USD
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Reads out emissions levels to the cars computer
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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Crankcase Vent Hose - Cylinders 1-4
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Rein - Corporate Logo
T#:384973
Part#: 11617547185
Ships in 3 Business Days
$ 57.99 USD
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$ 57.99 USD
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Should be replaced anytime leaks are detected
Oxygen Sensor - Priced Each
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Bosch - Corporate Logo
T#:590414
Part#: 11787590713
In Stock at Vendor
$ 249.99

This product was last offered at the strikethrough price on
02-23-2026

$ 190.99 USD
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$ 190.99 USD
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Bosch Oxygen Sensor - Right Bank - E53
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Bosch - Corporate Logo
T#:13051
Part#: 11787506539
In Stock at Vendor
$ 142.38 USD
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$ 142.38 USD
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BMW LAMBDA MONITOR SENSOR - Bosch BMW Oxygen Sensor

Upper Oil Separator Vent Tube
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Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 3 Business Days
$ 20.30 USD
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Burger Motorsports - Corporate Logo
T#:38688917
Part#: BMS-OCC-G2B58X
Ships on Aug 18, 2026
$ 269.00 USD
Free Shipping on orders $49 and up
**BMS Oil Catch Can – Gen2 B58 G05/G06 (Includes Silicone Intake Hose)** The **Burger Motorsports Oil Catch Can** for **Gen2 B58-powered G05/G06 BMWs** minimizes **oil blow-by**, preventing **carbon buildup** on intake valves while keeping your **intercooler and charge pipes clean** for peak performance. ### **Key Features & Benefits:** ✅ **Reduces oil buildup** for enhanced engine efficiency ✅ **Durable CNC-machined aluminum** construction for long-lasting performance ✅ **Integrated internal baffle system** ensures superior oil separation ✅ **Closed-loop PCV system** prevents venting to the atmosphere ✅ **High-performance silicone intake hose** improves airflow ✅ **Direct-fit design** for quick and fully reversible installation ✅ **Easy oil disposal**—unscrew the base or use the built-in drain plug 🔥 **Protect and optimize your Gen2 B58 engine with the BMS Oil Catch Can!** 🔥
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Secondary Air Pump
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URO - Corporate Logo
T#:639230
Part#: 11721433959
Ships in 1 Business Day
$ 234.59 USD
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$ 234.59 USD
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Common source of emissions related issues

OEM Bosch Oxygen Sensor -- BMW N62 S54
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Bosch - Corporate Logo
T#:14665
Part#: 11787540167
In Stock at Vendor
$ 206.82 USD
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$ 206.82 USD
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Bad oxygen sensors can cause check engine lights and poor fuel mileage. Replace your faulty sensor with this high quality Bosch sensor to turn off your check engine light and restore fuel mileage.

This is the pre-cat oxygen sensor for either bank 1 - cylinders 1-3 OR bank 2 - cylinders 4-6 for BMW Z4M Bosch # 15168. There is one sensor per bank. Sold individually. OEM replacement for BMW part # 11787540167.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!


This item fits the following BMWs:
2006-2008 E85 BMW Z4 M Roadster M Coupe

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Return Pipe
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URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 1 Business Day
$ 16.99 USD
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$ 16.99 USD
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Runs from the intake manifold back to connecting hose

Rein Crankcase Ventilation Hose - E34, E36
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379698
Part#: 11151726828
Ships in 3 Business Days
$ 9.17 USD
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Connected to valve cover connector

Rein - Corporate Logo
T#:45723145
Part#: 11157563506
Ships in 3 Business Days
$ 19.99 USD
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The Pressure Control Ventilation (PCV) valve is designed to route high-pressure blow-by gases from the crankcase into the intake manifold, relieving excess pressure while recycling gases back into the combustion process. When the PCV valve fails, it can lead to excessive oil consumption, rough idle, and stored engine fault codes. Replacing a worn or faulty valve restores proper crankcase ventilation, smooths out idle, clears codes, and helps keep your engine performing at its best.
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Oil Separator
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:555633
Part#: 11151705237
Ships in 1 Business Day
$ 10.99

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

$ 9.99 USD
Free Shipping on orders $49 and up
$ 9.99 USD
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Critical crankcase ventilation cyclone separator - great replacement or custom install!
Pressure Hose
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URO - Corporate Logo
T#:372643
Part#: 11727555680
Ships in 1 Business Day
$ 17.99 USD
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$ 17.99 USD
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Runs from the air pump to the solenoid valve


URO PCV Valve - Left Cylinder Bank - BMW N73 6.0L
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URO - Corporate Logo
T#:592794
Part#: 11157563505
Ships in 1 Business Day
$ 30.99 USD
Free Shipping on orders $49 and up
When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes and poor idle.
Febi Oil Separator - E53
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:363700
Part#: 11151705237
In Stock at Vendor
$ 21.99

This product was last offered at the strikethrough price on
05-07-2026

$ 20.99 USD
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$ 20.99 USD
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Critical crankcase ventilation cyclone separator - great replacement or custom install!
BMW Oil Separator Valve | E38 E39 540i 740i 740iL M62 4.4L Engine ...
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Rein - Corporate Logo
T#:39059263
Part#: 11151705272
In Stock at Vendor
$ 25.00 USD
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$ 25.00 USD
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BMW Oil Separator Valve | E38 E39 540i 740i 740iL M62 4.4L Engine is an essential component designed to maintain optimal engine performance by purging oil vapors from the engine block into the valve cover. This valve features four hoses connecting it to the dipstick, valve cover, and air intake system, ensuring efficient crankcase ventilation. BMW engines, especially in colder climates, are known to experience issues with oil separators freezing if the engine isn't properly warmed up, leading to symptoms such as howling noises followed by oil leaks.

  • Effectively purges oil vapors from the engine block to maintain clean operation
  • Designed for BMW E38 and E39 models with M62 4.4L engine
  • Helps prevent oil separator freezing in cold weather conditions
  • Features four hoses connected to the dipstick, valve cover, and air intake for optimal ventilation
  • Reduces engine sludge buildup, preventing potential damage and maintaining efficiency
  • Durable construction to withstand high temperatures and the demands of the engine

Replace a worn oil separator valve to maintain the proper ventilation and efficiency of your BMW engine, preventing oil leaks and other performance issues.

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Rein - Corporate Logo
T#:45723146
Part#: 11157563505
Ships in 3 Business Days
$ 19.99

This product was last offered at the strikethrough price on
04-28-2026

$ 15.99 USD
Free Shipping on orders $49 and up
$ 15.99 USD
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The Pressure Control Ventilation (PCV) valve is designed to route high-pressure blow-by gases from the crankcase into the intake manifold, relieving excess pressure while recycling gases back into the combustion process. When the PCV valve fails, it can lead to excessive oil consumption, rough idle, and stored engine fault codes. Replacing a worn or faulty valve restores proper crankcase ventilation, smooths out idle, clears codes, and helps keep your engine performing at its best.
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Oxygen Sensor
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:596865
Part#: 11787589138
In Stock at Vendor
$ 214.61

This product was last offered at the strikethrough price on
04-10-2026

$ 202.24 USD
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$ 202.24 USD
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Pierburg - Corporate Logo
T#:591851
Part#: 11721437911
In Stock at Vendor
$ 223.77

This product was last offered at the strikethrough price on
05-04-2026

$ 164.71 USD
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$ 164.71 USD
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Keep your engine running efficiently

Febi Crankcase Ventilation Hose - E34
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:381678
Part#: 11151708801
Ships in 1 Business Day
$ 11.99

This product was last offered at the strikethrough price on
05-07-2026

$ 9.99 USD
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$ 9.99 USD
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Prone to cracking and breaking.
Crankcase Ventilation Hose
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URO - Corporate Logo
T#:373085
Part#: 11151708801
In Stock
$ 8.03 USD
Free Shipping on orders $49 and up
The rubber breather pipes used a number of BMW applications are prone to cracking. Over the years, the engine heat and weather can take their toll and either weaken or cause breaks in these hoses. Your engine begins to run much worse due to massive vacuum leaks.
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URO - Corporate Logo
T#:50031894
Part#: 11721433958
Ships in 1 Business Day
New Item
$ 302.99 USD
Free Shipping on orders $49 and up
If you’re dealing with emissions-related faults, the Secondary Air Injection (SAI) pump is an important component to check. This system is designed to inject fresh air into the exhaust manifold during cold starts, helping reduce harmful emissions while the catalytic converters warm up. When the SAI pump is damaged or not operating correctly, emissions can increase and fault codes may be triggered. In states that require emissions testing, a failed air pump can easily result in a failed inspection. Replacing a faulty Secondary Air Injection Pump helps restore proper emissions control, clear related fault codes, and ensure your vehicle remains compliant with emissions requirements.
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Pierburg - Corporate Logo
T#:369787
Part#: 11727540471
In Stock at Vendor
$ 130.99

This product was last offered at the strikethrough price on
03-30-2026

$ 130.96 USD
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$ 130.96 USD
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Located on the cylinder head, allows air to enter into the exhaust
Vargas Turbo Technologies - Corporate Logo
T#:51672705
Part#: VTT-S/B58-LP-CC-
Ships in 10 Business Days
New Item
$ 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.


Pierburg - Corporate Logo
T#:594700
Part#: 11727838028
In Stock at Vendor
$ 150.04 USD
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$ 150.04 USD
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This is the secondary air pump valve for E9x M3 with the S65 V8 engine. Over time carbon builds up inside the secondary air pump valve causing it not to close properly. This failure to close properly can allow exhaust and moisture to get past the valve and enter the secondary air pump, leading to premature pump failure.
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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 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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FAE - Corporate Logo
T#:31556134
Part#: 11780872674
Ships in 8 Business Days
$ 74.99 USD
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$ 74.99 USD
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AUTOTECKNIC - Corporate Logo
T#:39971048
Part#: BM-0008
Ships in 7 Business Days
$ 64.99 USD
Free Shipping on orders $49 and up
A precision-crafted dry carbon fiber upgrade that enhances the engine bay of compatible BMW and MINI vehicles with a lightweight, motorsport-inspired design and easy OEM-style installation
Diesel Emissions Fluid Injector (Metering Unit)
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Bosch - Corporate Logo
T#:39261786
Part#: 18308514448
In Stock at Vendor
$ 317.99

This product was last offered at the strikethrough price on
04-10-2026

$ 293.99 USD
Free Shipping on orders $49 and up
$ 293.99 USD
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Vargas Turbo Technologies - Corporate Logo
T#:49822559
Part#: VTTS58CHECK
Ships in 10 Business Days
New Item
$ 69.99 USD
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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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Vargas Turbo Technologies - Corporate Logo
T#:52164893
Part#: S55PCVCPCCVTA
Ships in 10 Business Days
New Item
$ 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.

Pierburg - Corporate Logo
T#:594702
Part#: 11727513890
In Stock at Vendor
$ 425.65 USD
Free Shipping on orders $49 and up
Replacement Secondary Air Injection Pump from Pierburg

Condor Speed Shop - Corporate Logo
T#:577861
Part#: M20BLK
Ships in 2 Business Days
$ 39.99 USD
Free Shipping on orders $49 and up
Condor Speed Shop use's these in all of their spec cars to simplify the cooling system. These plates bolt to the back of the M20 head allowing you to delete the heater hose connection. Kit includes: 1 Block Off Plate 1 Gasket 1 Hose Block Off 2 Bolts 2 Washers This item fits: M20B20 1977–1981 E12 520/6 1979–1983 E21 320/6 1982–1984 E28 520 1982–1988 E28 520i 1983–1992 E30 320i 1988–1990 E34 520i M20B23 1977–1982 E21 323i 1982–1985 E30 323i M20B25 1986–1993 E30 325i, 325iS, 325iC and 325iX 1989–1990 E34 525i 1988–1991 Z1 M20B27 1982–1988 E30 325/325e/325es 1982–1988 E28 525e (or 528e in the US)
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Pierburg - Corporate Logo
T#:56580202
Part#: 11668634120
In Stock at Vendor
New Item
$ 612.41 USD
$ 612.41 USD
OEM Bosch Diesel Emissions Fluid Heater Assembly - E90 335d
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Bosch - Corporate Logo
T#:596905
Part#: F01C600252
In Stock at Vendor
$ 721.60 USD
Free Shipping on orders $49 and up
A common source of issues, the DEF Heater Assembly can fail, requiring you to replace the entire DEF Active Tank. With this OEM Bosch DEF heater assembly, you can repair your Active Tank without needing to replace the entire tank, saving you a significant amount of money on repairs.
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Oxygen Sensor
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Bosch - Corporate Logo
T#:596872
Part#: 11787589139
In Stock at Vendor
$ 137.72

This product was last offered at the strikethrough price on
04-10-2026

$ 129.79 USD
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$ 129.79 USD
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Rein - Corporate Logo
T#:55821694
Part#: 11127547058
Ships in 3 Business Days
New Item
$ 16.99 USD
Free Shipping on orders $49 and up
This Rein Automotive repair kit allows you to service the internal components of the crankcase breather valve independently. Instead of replacing the entire, costly valve cover or manifold assembly, this kit provides the exact wear items required to rebuild the factory housing back to original operating specifications. All components are manufactured to strict OE tolerances. The diaphragm is molded from premium, oil-resistant elastomers engineered to withstand prolonged exposure to aggressive synthetic lubricants, fuel vapors, and extreme under-hood heat cycles without losing its elasticity or sealing profile.
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