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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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"Cold Climate" Crankcase Pressure Regulator Valve
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:376770
Part#: 11617533400
Ships in 1 Business Day
$ 70.99

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

$ 40.99 USD
Free Shipping
$ 40.99 USD
Free Shipping
Commonly referred to as the "oil separator" or PCV
Rein Crankcase Ventilation Hose - Cylinders 1-4
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17738390
Part#: 11617563476
Ships in 3 Business Days
$ 46.99 USD
Free Shipping on orders $49 and up
$ 46.99 USD
Free Shipping on orders $49 and up
Manufactured with high-quality materials to withstand heat, dirt, and debris, matching OE expectations.
Return Pipe
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:372847
Part#: 11617504536
Ships in 1 Business Day
$ 16.99 USD
Free Shipping on orders $49 and up
$ 16.99 USD
Free Shipping on orders $49 and up
Runs from the intake manifold back to connecting hose

Crankcase Ventilation Dipstick Hose - BMW M52TU M54
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:359570
Part#: 11157532629
Ships in 1 Business Day
$ 12.99 USD
Free Shipping on orders $49 and up

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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Crankcase Ventilation Hose
2X Entries Into Our F80 M3 Sweepstakes
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Rein - Corporate Logo
T#:379684
Part#: 11151730507
Ships in 3 Business Days
$ 9.99 USD
Free Shipping on orders $49 and up
From valve cover breather connector to reducer
URO Oxygen Sensor - Post Cat - BMW N63 4.4L
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:43750201
Part#: 11787614322
Ships in 1 Business Day
$ 69.99 USD
Free Shipping on orders $49 and up
Replace worn-out and or malfunctioning O2 sensors to make your vehicle emissions compliant

Oil Separator Valve
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594299
Part#: 11617531423
Ships in 3 Business Days
$ 120.81 USD
Free Shipping
$ 120.81 USD
Free Shipping
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.
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Pressure Hose
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:372643
Part#: 11727555680
Ships in 1 Business Day
$ 17.99 USD
Free Shipping on orders $49 and up
$ 17.99 USD
Free Shipping on orders $49 and up
Runs from the air pump to the solenoid valve

Victor Reinz - Corporate Logo
T#:375264
Part#: 11727506214
In Stock
$ 7.30

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

$ 6.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 7.30

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

$ 6.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Goes between the valve and intake tube

Oxygen Sensor - Upstream Catalytic Converter
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:50066854
Part#: 11787596908
In Stock
$ 99.99 USD
Free Shipping on orders $49 and up
$ 99.99 USD
Free Shipping on orders $49 and up
Bosch - Corporate Logo
T#:591939
Part#: 11787537993
Ships in 1 day
$ 156.99 USD
Free Shipping
$ 156.99 USD
Free Shipping
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. 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!
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Rein Crankcase Ventilation Hose - E34, E36
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379698
Part#: 11151726828
Ships in 3 Business Days
$ 9.17 USD
Free Shipping on orders $49 and up
Connected to valve cover connector


Dorman - Corporate Logo
T#:56110341
Part#: 306-006
Ships in 1 Business Day
New Item
$ 427.99

This product was last offered at the strikethrough price on
07-17-2026

$ 327.99 USD
Free Shipping on orders $49 and up
$ 327.99 USD
Free Shipping on orders $49 and up
BMW Breather Valve
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:17339405
Part#: 11127537733
Ships in 1 Business Day
$ 27.99

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

$ 19.99 USD
$ 19.99 USD
Are you experiencing a slight loss of power? This pressure regulator valve repair kit could easily be the culprit. With a bad gasket or weak spring you could be losing pressure, resulting in less power.
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Upper Oil Separator Vent Tube
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 3 Business Days
$ 20.30 USD
Free Shipping on orders $49 and up

Delphi - Corporate Logo
T#:639935
Part#: 13907572086
Ships in 1 Business Day
$ 49.99 USD
Free Shipping on orders $49 and up
URO - Corporate Logo
T#:2853
Part#: 11611432559
Ships in 1 Business Day
$ 14.99 USD
Free Shipping on orders $49 and up
$ 14.99 USD
Free Shipping on orders $49 and up
This Crankcase Vent Hose - From Valve Cover to Oil Separator fits BMWs with the M52 or M54 6 cylinder engine including E46 323i 325i 328i 330i E39 525i 528i 530i E60 525i 530i X3 2.5i 3.0i X5 3.0i Z3 2.5 2.8 3.0i Z4 2.5i 3.0i.

This item fits the following BMWs:
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
1999-2005 E46 BMW 325i 325ci 325xi - only with M54 engine
1999-2003 E39 BMW 528i 528i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2000-2006 E53 BMW X5 3.0i
1999-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8i Z3 3.0i
2003-2006 E85 BMW Z4 2.5i Z4 3.0i
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URO Crankcase Ventilation Hose - BMW M52TU M54
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:377307
Part#: 11157532649
Ships in 1 Business Day
$ 12.99 USD
Free Shipping on orders $49 and up
$ 12.99 USD
Free Shipping on orders $49 and up
From oil separator to dipstick tube
Rein Return Pipe - E39, E46, E53, E60, E83, Z3, Z4
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock
$ 19.99 USD
Free Shipping on orders $49 and up
$ 19.99 USD
Free Shipping on orders $49 and up
Runs from the intake manifold back to connecting hose


Bosch - Corporate Logo
T#:590414
Part#: 11787590713
Ships in 1 Business Day
$ 195.99

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

$ 152.01 USD
Free Shipping
$ 152.01 USD
Free Shipping
Victor Reinz - Corporate Logo
T#:19104
Part#: 11151747978
Ships in 1 Business Day
$ 5.69

This product was last offered at the strikethrough price on
06-05-2026

$ 4.80 USD
Free Shipping on orders $49 and up
$ 4.80 USD
Free Shipping on orders $49 and up


O-RING 11151747978 Manufactured by Reinz

OEM Rein Oil Separator Vent Hose - E60/1 E90/1 N52
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402020
Part#: 11617522933
Ships in 1 Business Day
$ 19.99 USD
Free Shipping on orders $49 and up
If your BMW has a damaged vent hose, be sure to replace it to restore functionality of this rather important emissions system.


Vacuum Pipe
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17704694
Part#: 11157603816
Ships in 3 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
URO PCV Valve - Left Cylinder Bank - BMW N73 6.0L
2X Entries Into Our F80 M3 Sweepstakes
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.
Bosch - Corporate Logo
T#:14665
Part#: 11787540167
Ships in 1 day
$ 206.82

This product was last offered at the strikethrough price on
08-03-2026

$ 188.99 USD
Free Shipping
$ 188.99 USD
Free Shipping

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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BMW PCV Valve - Right Cylinder Bank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45723145
Part#: 11157563506
Ships in 3 Business Days
$ 19.99 USD
Free Shipping on orders $49 and up
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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Secondary Air Injection Pump
2X Entries Into Our F80 M3 Sweepstakes
URO - Corporate Logo
T#:50031894
Part#: 11721433958
Ships in 1 Business Day
$ 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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Bosch - Corporate Logo
T#:578980
Part#: 16808
Ships in 1 day
$ 134.99

This product was last offered at the strikethrough price on
08-13-2026

$ 127.99 USD
Free Shipping
$ 127.99 USD
Free Shipping
Mounted on the rear portion of exhaust manifold

Bosch - Corporate Logo
T#:380994
Part#: 11787512002
Ships in 1 day
$ 166.99

This product was last offered at the strikethrough price on
08-03-2026

$ 136.99 USD
Free Shipping
$ 136.99 USD
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Length: 325mm
Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 1 Business Day
$ 458.99 USD
Free Shipping
$ 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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    Secondary Air Injection Pump
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:639220
    Part#: 11721437911
    Ships in 1 Business Day
    $ 130.66 USD
    Free Shipping on orders $49 and up
    Keep your engine running efficiently

    Crankcase Vent Hose - Cylinders 5-8
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384972
    Part#: 11617547186
    Ships in 3 Business Days
    $ 59.99 USD
    Free Shipping
    $ 59.99 USD
    Free Shipping
    Should be replaced anytime leaks are detected
    Febi Oil Separator - E53
    We Price Match - Give Us A Call or Chat!
    Febi - Corporate Logo
    T#:363700
    Part#: 11151705237
    Ships in 1 Business Day
    $ 21.99

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

    $ 20.99 USD
    Free Shipping on orders $49 and up
    $ 20.99 USD
    Free Shipping on orders $49 and up
    Critical crankcase ventilation cyclone separator - great replacement or custom install!
    Secondary Air Pump
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:37757223
    Part#: 11727571591
    Ships in 1 Business Day
    $ 181.99 USD
    Free Shipping on orders $49 and up
    **Features:** - Optimized design for maximum airflow - Precision bearings ensure quiet operation with minimal vibration - Durable, high-quality housing for long-lasting performance


    Bosch - Corporate Logo
    T#:639143
    Part#: 16197244137
    Ships in 1 Business Day
    $ 523.99

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

    $ 509.94 USD
    Free Shipping
    $ 509.94 USD
    Free Shipping
    This "SCR Delivery Unit" is otherwise known as the Diesel Emissions Fluid Pump, or as the supply module, and pressurizes the SCR diesel exhaust fluid system. Replace your pump with this OEM Bosch fluid pump to restore smooth operation of your SCR system.
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    Crankcase Ventilation Hose
    2X Entries Into Our F80 M3 Sweepstakes
    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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    Bosch - Corporate Logo
    T#:577971
    Part#: 11787561410
    Ships in 1 Business Day
    $ 220.23

    This product was last offered at the strikethrough price on
    04-09-2026

    $ 207.09 USD
    Free Shipping
    $ 207.09 USD
    Free Shipping
    Commonly referred to as an Oxygen Sensor

    Crankcase Vent Hose - Cylinders 1-4
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384973
    Part#: 11617547185
    Ships in 3 Business Days
    $ 57.99 USD
    Free Shipping
    $ 57.99 USD
    Free Shipping
    Should be replaced anytime leaks are detected

    Rein Crank Case Ventilation Valve
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:17704764
    Part#: 11158647298
    In Stock
    $ 61.80

    This product was last offered at the strikethrough price on
    09-29-2026

    $ 60.03 USD
    Free Shipping on orders $49 and up
    $ 60.03 USD
    Free Shipping on orders $49 and up
    Designed to be a direct fit for OEM hoses, Rein has replacements for an affordable cost.
    Oil Return Hose
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:592793
    Part#: 11157560068
    Ships in 1 Business Day
    $ 9.99 USD
    Free Shipping on orders $49 and up
    Hose that attaches between the crankcase vent and the oil return pipe

    Pierburg - Corporate Logo
    T#:7046
    Part#: 11721433818
    Ships in 1 Business Day
    $ 587.99

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

    $ 557.99 USD
    Free Shipping
    $ 557.99 USD
    Free Shipping
    This secondary air pump helps to reduce emissions by mixing fresh air with the exhaust. When this part fails cause a engine fault code and it will trigger a "service engine soon" light. 
    Pierburg pumps are some of the most trusted and widely used on the market. From fuel, water, air and vacuum Pierburg has you covered with OE quality and reliable performance year after year.

    This item fits the following BMWs:
    1996-1998 E36 BMW 318i 318is 318ti 318ic with M44 engine
    1996-1998 Z3 BMW Z3 1.9
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    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
    Free Shipping on orders $49 and up
    $ 9.99 USD
    Free Shipping on orders $49 and up
    Prone to cracking and breaking.

    Bosch - Corporate Logo
    T#:13051
    Part#: 11787506539
    Ships in 1 Business Day
    $ 142.38

    This product was last offered at the strikethrough price on
    08-03-2026

    $ 115.98 USD
    Free Shipping
    $ 115.98 USD
    Free Shipping
    BMW LAMBDA MONITOR SENSOR - Bosch BMW Oxygen Sensor

    Pierburg - Corporate Logo
    T#:369787
    Part#: 11727540471
    Special Order: No Guaranteed ETA
    $ 134.99 USD
    Free Shipping
    $ 134.99 USD
    Free Shipping
    Located on the cylinder head, allows air to enter into the exhaust
    Secondary Air Pump
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:639230
    Part#: 11721433959
    Ships in 1 Business Day
    $ 234.59 USD
    Free Shipping
    $ 234.59 USD
    Free Shipping
    Common source of emissions related issues
    Pierburg - Corporate Logo
    T#:591851
    Part#: 11721437911
    Ships in 1 Business Day
    $ 308.99

    This product was last offered at the strikethrough price on
    08-13-2026

    $ 164.70 USD
    Free Shipping
    $ 164.70 USD
    Free Shipping
    Keep your engine running efficiently


    Bosch - Corporate Logo
    T#:596865
    Part#: 11787589138
    Ships in 1 Business Day
    $ 214.61

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

    $ 202.24 USD
    Free Shipping
    $ 202.24 USD
    Free Shipping
    Crankcase Vent Hose / PCV Hose
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:56977971
    Part#: 11127588417
    Ships in 1 Business Day
    New Item
    $ 42.99 USD
    Free Shipping on orders $49 and up
    This URO Parts crankcase ventilation line offers a durable, budget-friendly replacement for failing factory tubing.