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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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Rein - Corporate Logo
T#:379766
Part#: 11151740393
In Stock at Vendor
$ 9.99

This product was last offered at the strikethrough price on
03-24-2026

$ 7.19 USD
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$ 7.19 USD
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Attaches the PCV to the oil dipstick tube
Oil Separator Valve
5X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Hengst - Corporate Logo
T#:22064588
Part#: AS819M
In Stock
$ 41.99

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

$ 31.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 41.99

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

$ 31.99 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.
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Bremmen Parts - Corporate Logo
T#:36710102
Part#: 13627805758
In Stock
Sale - Save 23% $ 70.99

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

$ 54.99 USD
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Sale - Save 23%
$ 70.99

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

$ 54.99 USD
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This exhaust backpressure sensor is a critical component of your vehicle's Diesel Particulate Filter (DPF) system, designed to monitor backpressure levels and trigger the regeneration cycle when needed. By ensuring the DPF operates efficiently, this sensor helps maintain optimal engine performance and prolongs the life of your powertrain.

A malfunctioning sensor is a common cause of check engine lights and DPF-related fault codes. If you're encountering issues with regeneration or fault codes, replacing the faulty sensor is essential to restore proper functionality. Choose this high-quality replacement from Bremmen for a reliable solution to keep your DPF system performing at its best.

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Vitesco Technologies - Corporate Logo
T#:33446263
Part#: 13628589844
In Stock
Sale - Save 5% $ 442.99

This product was last offered at the strikethrough price on
07-14-2026

$ 420.84 USD
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Sale - Save 5%
$ 442.99

This product was last offered at the strikethrough price on
07-14-2026

$ 420.84 USD
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Oxygen sensors measure exhaust oxygen. Their signals are used by the vehicle computer to adjust the air/fuel ratio and test vehicle emissions. Degraded oxygen sensors reduce engine performance and fuel efficiency, and increase harmful tailpipe emissions. They can also turn on the Check Engine Light and cause a car to fail an emissions test.
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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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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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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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Victor Reinz - Corporate Logo
T#:592731
Part#: 07119906360
In Stock
$ 3.99

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

$ 2.99 USD
Limited Qty Sale
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$ 3.99

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

$ 2.99 USD
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If this gasket fails it can cause oil leaks and other issues. Replace it at any sign of failure!

URO - Corporate Logo
T#:25109076
Part#: 11157831311
Ships on Sep 16, 2026
$ 17.99 USD
Free Shipping on orders $49 and up

This hose runs from the oil separator to the intake manifold and is designed to allow the recirculation of built-up oil vapors.

Due to its proximity to engine heat, this hose tends to get brittle and break as it ages. This can lead to oil leaks, vacuum leaks, misfires, and more.

If your crankcase ventilation hose is brittle or leaking, replace it with this unit from URO Parts.

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URO - Corporate Logo
T#:6703
Part#: 11151740393
Ships on Oct 5, 2026
$ 5.89 USD
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ENGINE VENT HOSE 11151740393

Vaico Oil Separator Valve - E38, E39
We Price Match - Give Us A Call or Chat!
Vaico - Corporate Logo
T#:363292
Part#: 11151705272
In Stock
Sale - Save 25% $ 31.99

This product was last offered at the strikethrough price on
05-02-2026

$ 23.87 USD
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Sale - Save 25%
$ 31.99

This product was last offered at the strikethrough price on
05-02-2026

$ 23.87 USD
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Connects to the vent tube which is attached to the PCV valve

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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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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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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Victor Reinz - Corporate Logo
T#:591905
Part#: 13547792098
Ships in 3 Business Days
$ 4.99

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

$ 3.99 USD
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$ 3.99 USD
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A faulty EGR gasket can lead to catastrophic failures like misfires, reduced engine power, and increased emissions. Replace these at any sign of failure!.
Bremmen Parts - Corporate Logo
T#:8741202
Part#: 11151705272B
In Stock
Sale - Save 17% $ 22.99

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

$ 19.07 USD
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Sale - Save 17%
$ 22.99

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

$ 19.07 USD
Free Shipping on orders $49 and up
BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake.
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Bremmen Parts - Corporate Logo
T#:27105146
Part#: 11787589121
Special Order: No Guaranteed ETA
Sale - Save 16% $ 118.99

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

$ 100.00 USD
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Sale - Save 16%
$ 118.99

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

$ 100.00 USD
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Genuine BMW - Corporate Logo
T#:522831
Part#: 11788604889
In Stock
16% off MSRP $ 233.99

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

$ 206.99 USD
Limited Qty Sale
Free Shipping
16% off MSRP
$ 233.99

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

$ 206.99 USD
Limited Qty Sale
Free Shipping
Rein - Corporate Logo
T#:33980389
Part#: 11617508541
In Stock
$ 32.99

This product was last offered at the strikethrough price on
06-10-2026

$ 29.99 USD
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$ 32.99

This product was last offered at the strikethrough price on
06-10-2026

$ 29.99 USD
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Located on the intake manifold this valve is engineered to reduce internal pressure, minimize the risk of oil leaks, and help your engine run more efficiently

Packaged by Turner - Corporate Logo
T#:55353594
Part#: 11787545074/5KT2
In Stock
New Item
$ 366.99 USD
Free Shipping on orders $49 and up
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.

Packaged by Turner - Corporate Logo
T#:55857772
Part#: 11787589475KT2
In Stock
New Item
$ 335.99 USD
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Extreme exhaust heat and carbon buildup degrade your factory oxygen sensors over time, sending lazy data to your DME and robbing you of performance.
Packaged by Turner - Corporate Logo
T#:55317713
Part#: BFR1/2O2SKT2
In Stock
New Item
$ 400.99

This product was last offered at the strikethrough price on
07-14-2026

$ 333.99 USD
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$ 333.99 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

Packaged by Turner - Corporate Logo
T#:56110313
Part#: 11787558055KT
In Stock
New Item
$ 307.99

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

$ 304.99 USD
Free Shipping on orders $49 and up
$ 304.99 USD
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Your engine's air fuel ratio needs to be dead on. Worn out factory pre-cat oxygen sensors delay vital data to the DME, leading to sub optimal fueling, lost horsepower, and dangerous hesitation under load.
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034Motorsport - Corporate Logo
T#:587831
Part#: 034-101-4000
Ships in 2 Business Days
Sale - Save 10% $ 153.00

This product was last offered at the strikethrough price on
08-17-2026

$ 137.70 USD
Free Shipping
Sale - Save 10%
$ 153.00

This product was last offered at the strikethrough price on
08-17-2026

$ 137.70 USD
Free Shipping


Genuine BMW - Corporate Logo
T#:45137
Part#: 16131183912
Ships in 1 Business Day
$ 7.99 USD
Free Shipping on orders $49 and up


Genuine BMW Sealing Grommet
This item fits the following BMW Chassis:
E39 M5,E46 M3,E70 X5M,E71 X6M,E82 1M Coupe,E85 Z4M,E38,E39,E46,E70 X5,E71 X6,E82,E83 X3,E85 Z4,E86 Z4,E89 Z4,E90,E92,E93,F01,F02,F22,F30,F31,F32,F33,F34,F36,F80 M3,F82 M4,F83

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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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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

$ 7.26 USD
Free Shipping on orders $49 and up
$ 7.26 USD
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Goes between the valve and intake tube


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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Bosch - Corporate Logo
T#:590414
Part#: 11787590713
Ships in 1 Business Day
$ 249.99

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

$ 152.01 USD
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$ 152.01 USD
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Rein - Corporate Logo
T#:384805
Part#: 11611440317
Ships in 3 Business Days
$ 20.30 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
In Stock at Vendor
$ 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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Febi - Corporate Logo
T#:6707
Part#: 11157532649
Ships in 2 Business Days
$ 19.12

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

$ 17.19 USD
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$ 17.19 USD
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ENGINE VENT HOSE 11157532649
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
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$ 40.99 USD
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Commonly referred to as the "oil separator" or PCV

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
URO - Corporate Logo
T#:50066854
Part#: 11787596908
In Stock
New Item
$ 99.99 USD
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$ 99.99 USD
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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

$ 5.68 USD
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$ 5.68 USD
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O-RING 11151747978 Manufactured by Reinz


Rein - Corporate Logo
T#:17704694
Part#: 11157603816
Ships in 3 Business Days
$ 35.99 USD
Free Shipping on orders $49 and up
Rein - Corporate Logo
T#:375092
Part#: 11617504536
In Stock
$ 19.99 USD
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$ 19.99 USD
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Runs from the intake manifold back to connecting hose
Rein - Corporate Logo
T#:594299
Part#: 11617531423
Ships in 3 Business Days
$ 120.81 USD
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$ 120.81 USD
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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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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
Rein - Corporate Logo
T#:2879
Part#: 11157532629
In Stock at Vendor
$ 11.99

This product was last offered at the strikethrough price on
03-26-2026

$ 10.99 USD
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$ 10.99 USD
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This is the updated hose that goes from the Crankcase Oil Separator Valve to the oil dipstick tube. This tube tends to get plugged with oil sludge and becomes brittle and cracks. It fits E46 323i 323ci 325i (M54) 325ci (M54) 325xi 328i 328ci 330i 330ci 330xi - E39 525i 530i - E60 525i 530i 2004-2005 - X3 2.5i 3.0i 2004-2006 - Z3 2.5i 3.0i - Z4 2.5i 3.0i 2003-2006.
In german, Rein means Pure. In the automotive industry the Rein name has quickly come to represent quality. With fitments for some of the world’s finest automobiles including BMW and Mini and guaranteed OE quality, Rein is a name you can trust.

This item fits the following BMWs:
2001-2005 E46 BMW 325i 325ci 325xi Only for cars with M54 engine
1999-2005 E46 BMW 323i 323ci 328i 328ci 330i 330ci 330xi
2001-2003 E39 BMW 525i 530i
2004-2005 E60 BMW 525i 525xi 530i 530xi
2004-2006 E83 BMW X3 2.5i X3 3.0i
2001-2002 Z3 BMW Z3 2.5i Z3 3.0i
2003-2005 Z4 BMW Z4 2.5i Z4 3.0i
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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

URO - Corporate Logo
T#:377307
Part#: 11157532649
Ships in 1 Business Day
$ 12.99 USD
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$ 12.99 USD
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From oil separator to dipstick tube
Delphi - Corporate Logo
T#:639935
Part#: 13907572086
Ships in 2 Business Days
$ 49.99 USD
Free Shipping on orders $49 and up

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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Dorman - Corporate Logo
T#:56110341
Part#: 306-006
In Stock at Vendor
New Item
$ 427.99

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

$ 322.99 USD
Free Shipping on orders $49 and up
$ 322.99 USD
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M7 Speed - Corporate Logo
T#:25706128
Part#: 90-1066
Ships in 1 Business Day
$ 74.99 USD
Free Shipping on orders $49 and up

Upgrade Your R55-R59 N18 Engine with Replacement M7 Speed Oil Catch Can Hose Kit

Upgrade your R55-R59 N18 engine's oil catch can hoses with the Replacement M7 Speed Oil Catch Can Hose Kit. Specifically designed for Generation 2 engines, this kit includes two hoses with the correct adapters for connecting to the engine cam cover PCV hose. Please note that hardware, clamps, and brackets are not included with this kit.

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Bosch - Corporate Logo
T#:577971
Part#: 11787561410
Ships in 2 Business Days
$ 220.23

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

$ 207.09 USD
Free Shipping
$ 207.09 USD
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Commonly referred to as an Oxygen Sensor
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.
Bosch - Corporate Logo
T#:380993
Part#: 11787512567
Ships in 2 Business Days
$ 135.80

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

$ 127.97 USD
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$ 127.97 USD
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Length: 325mm


URO - Corporate Logo
T#:56977985
Part#: 11611312737
Ships in 1 Business Day
New Item
$ 12.99 USD
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Keep your BMW's vacuum and secondary air injection systems operating with complete efficiency under all driving conditions using this URO Parts non-return valve
Dinan - Corporate Logo
T#:398512
Part#: D401-0014
Ships in 5 Business Days
11% off MSRP $ 107.99

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

$ 95.99 USD
Free Shipping
11% off MSRP
$ 107.99

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

$ 95.99 USD
Free Shipping
Replacement filter that is found on the back of the air pump housing.