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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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Bosch - Corporate Logo
T#:14663
Part#: 11787539125
In Stock
$ 155.99

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

$ 111.99 USD
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$ 111.99 USD
Free Shipping on orders $49 and up

The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance.

This is a Bosch O2 sensor - also known as a Lambda probe. Bosch is an OEM supplier to BMW.

Position: after the catalytic converter (post-cat).

This item fits the following BMWs:
2008-2013 E90 E92 E93 BMW M3 Sedan, Coupe, Convertible

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Performance Oil Separator Kit - M52/S52
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships in 1 Business Day
$ 85.28 USD
Free Shipping on orders $49 and up
$ 85.28 USD
Free Shipping on orders $49 and up

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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Bosch - Corporate Logo
T#:18468288
Part#: 13907643106
In Stock
$ 73.14 USD
Free Shipping on orders $49 and up
Common CEL cause on B48/B58/S58. Get your fuel system functioning properly again!

Bosch - Corporate Logo
T#:13332220
Part#: 13907614013
In Stock
$ 80.58

This product was last offered at the strikethrough price on
06-21-2026

$ 50.07 USD
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$ 50.07 USD
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Packaged by Turner - Corporate Logo
T#:24344785
Part#: M54OILSEPKT
Ships in 5 Business Days
Sale - Save 1% $ 133.99

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

$ 133.16 USD
Free Shipping on orders $49 and up
Sale - Save 1%
$ 133.99

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

$ 133.16 USD
Free Shipping on orders $49 and up
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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Crank Case Vent Hose Kit - S63 4.4L Engine
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:23913949
Part#: CRNKVENTKITKT
In Stock
$ 224.99 USD
Free Shipping on orders $49 and up

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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Genuine Volkswagen Audi - Corporate Logo
T#:22558987
Part#: GUS052910A3
In Stock
2% off MSRP $ 32.56

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

$ 32.07 USD
Free Shipping on orders $49 and up
2% off MSRP
$ 32.56

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

$ 32.07 USD
Free Shipping on orders $49 and up

For BMW enthusiasts committed to optimizing their vehicle's performance, the AdBlue Diesel Exhaust Fluid (DEF) - 9.46 Liters is the perfect solution. Engineered to enhance BMW diesel engines' efficiency, this DEF fluid ensures that your vehicle remains compliant with emission standards while operating at its peak.

  • Exceptional Purity: The AdBlue DEF Fluid - 9.46 Liters offers superior purity, safeguarding your BMW's exhaust system and reducing harmful emissions.
  • Emissions Compliance: Maintain your BMW's compliance with strict emission regulations, ensuring you can drive with peace of mind.
  • Extended Range: With 9.46 liters of DEF fluid, you'll enjoy an extended range before requiring a refill, providing convenience for your journeys.
  • Effortless Refilling: The user-friendly design of the container makes refilling your DEF reservoir a hassle-free task.
  • BMW Compatibility: This DEF fluid is tailored to meet BMW's stringent requirements, assuring compatibility with your vehicle.

Choose the AdBlue DEF Fluid - 9.46 Liters to enhance your BMW's efficiency and environmental responsibility. Drive confidently, knowing your vehicle is optimized for peak performance and emissions compliance.

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Oil Separator kit - N63
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56291074
Part#: 11158636540KT2
In Stock
New Item
$ 442.99 USD
Free Shipping on orders $49 and up
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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Radium Engineering - Corporate Logo
T#:27905095
Part#: 20-0024
In Stock at Vendor
$ 28.99 USD
Free Shipping on orders $49 and up

Includes:

Anodized 4AN ORB Barbed Adapter Fitting, Black Ball Valve with 1/4" Barbs, 125psi @ 140F 4 feet of Radium 1/4" PCV Hose


AUTOTECKNIC - Corporate Logo
T#:39971046
Part#: BM-0006-BCG
In Stock
$ 65.00 USD
Free Shipping on orders $49 and up
AutoTecknic - Carbon Competition Fuel Cap Cover - Various BMW and MINI Models is a premium exterior upgrade crafted from genuine carbon fiber, designed to enhance the aggressive styling and performance aesthetic of compatible BMW and MINI vehicles with an easy, OEM-fit installation.
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Bosch - Corporate Logo
T#:14686
Part#: 11787589475
In Stock
$ 172.99 USD
Free Shipping on orders $49 and up
$ 172.99 USD
Free Shipping on orders $49 and up

The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance. Bosch's Oxygen sensors are high quality and will give you the the longest and best performance for the price.

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 BMW Chassis:
E82,E90,E92,E93,F30,F34

Fits BMW Engines including:
N55 - up to 08/2013

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Bosch - Corporate Logo
T#:583740
Part#: 18307807206
Ships in 1 Business Day
$ 380.99

This product was last offered at the strikethrough price on
10-17-2026

$ 368.99 USD
Free Shipping on orders $49 and up
$ 368.99 USD
Free Shipping on orders $49 and up
The Selective Catalytic Reduction (SCR) system on your diesel BMW reduces exhaust emissions by injecting diesel exhaust fluid (a mixture of urea and water) into the exhaust to neutralize pollutants. If your tank is empty or your metering valve has failed, your car will not start until the problem is remedied. Replace yours with an OEM Bosch to restore your emissions system and get your car back on the road! 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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Bosch - Corporate Logo
T#:591943
Part#: 11787595353
Ships in 1 Business Day
$ 234.99

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

$ 210.99 USD
Free Shipping on orders $49 and up
$ 210.99 USD
Free Shipping on orders $49 and up
Bosch - Corporate Logo
T#:380799
Part#: 11787836451
Ships in 1 Business Day
$ 155.99

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

$ 130.99 USD
Free Shipping on orders $49 and up
$ 130.99 USD
Free Shipping on orders $49 and up

The oxygen sensor is vital to the performance and drivability of your car. The engine computer relies on data from the sensor to make adjustments in engine efficiency and performance. When your BMW oxygen sensor fails, the computer can no longer sense the air/fuel ratio, so it ends up guessing -- resulting in poor performance, poor gas mileage, and increased pollution. Make sure your BMW engine performs as it should, and doesn't use more fuel than it needs to, by simply changing your oxygen sensor today. There is no lifespan on O2 sensors but there are several fault codes that indicate a failed sensor (O2 monitoring, cat efficiency, O2 heating circuit, O2 readiness, and others). The O2 sensor is heated and has a self-calibration feature so once you get the codes or feel performance has suffered, a new sensor is a good starting point to get you back to peak performance.

This is a Bosch O2 sensor - also known as a Lambda probe. Bosch is an OEM supplier to BMW.

Position: post-cat, after the catalytic converter (pre-cat). Bank 1 and Bank 2 use the same sensor (2 required per vehicle).

This item fits the following BMWs:
2006-2010 E60 BMW M5
2006-2010 E63 E64 BMW M6

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Bosch - Corporate Logo
T#:25042571
Part#: 11787848482
Ships in 1 Business Day
$ 241.99

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

$ 215.99 USD
Free Shipping on orders $49 and up
$ 215.99 USD
Free Shipping on orders $49 and up

Bosch - Corporate Logo
T#:28404655
Part#: F01C600251
Ships in 1 day
$ 503.99 USD
Free Shipping on orders $49 and up

The SCR reservoir heater, found in the DEF active tank, is a frequently failing component that can lead to emissions-related DTCs. When it fails, replacing the entire tank assembly is often necessary, which can be expensive if using Genuine parts.

Fortunately, Bosch offers a high-quality replacement heater and tank assembly, ensuring a seamless and reliable replacement process. Opting for Bosch means choosing a cost-effective repair solution that promises durability and longevity.

For a hassle-free replacement of your SCR heater, trust Bosch to deliver lasting performance.

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Bosch - Corporate Logo
T#:37575
Part#: 11761466063
Special Order: No Guaranteed ETA
$ 67.99

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

$ 63.99 USD
Free Shipping on orders $49 and up
$ 63.99 USD
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Bosch OXYGEN SENSOR 11032

Fits BMW Engines including:
M10,M20,M30
 

1980+ E21 BMW 320i M10 1.8L
Up to 03/1987 E28 BMW 528e M20 2.7L
E28 BMW 533i M30 3.2L
up to 12/1984 E30 BMW 318i M10 1.8L
09/1981+ E24 BMW M30 3.2L

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Oil Separator Kit - Level 1
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:15710823
Part#: E46M5411_61KT
In Stock
$ 93.71 USD
Free Shipping on orders $49 and up
Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. As long as you have everything off, you can rest assured that new parts will last and be reliable. BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. ur Level 1 kit includes the following; Oil separator Hose from oil separator to dipstick tube Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold
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Front Oxygen Sensor Set - E9x, E82, E88, Z4
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:55317713
Part#: BFR1/2O2SKT2
In Stock
New Item
Sale - Save 19% $ 400.99

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

$ 325.67 USD
Free Shipping on orders $49 and up
Sale - Save 19%
$ 400.99

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

$ 325.67 USD
Free Shipping on orders $49 and up
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
Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:56110313
Part#: 11787558055KT
In Stock
New Item
Sale - Save 6% $ 307.99

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

$ 289.50 USD
Free Shipping on orders $49 and up
Sale - Save 6%
$ 307.99

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

$ 289.50 USD
Free Shipping on orders $49 and up
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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Rear Oxygen Sensor Set - N52, N54
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:55353594
Part#: 11787545074/5KT2
In Stock
New Item
Sale - Save 3% $ 366.99

This product was last offered at the strikethrough price on
10-28-2026

$ 355.63 USD
Free Shipping on orders $49 and up
Sale - Save 3%
$ 366.99

This product was last offered at the strikethrough price on
10-28-2026

$ 355.63 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.

Air Adjustment Unit/DISA Valve Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:15677538
Part#: 11617533344-KT
In Stock
$ 122.12 USD
Free Shipping on orders $49 and up
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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Packaged by Turner - Corporate Logo
T#:55857772
Part#: 11787589475KT2
In Stock
New Item
$ 342.99 USD
Free Shipping on orders $49 and up
Extreme exhaust heat and carbon buildup degrade your factory oxygen sensors over time, sending lazy data to your DME and robbing you of performance.
Cold Climate Oil Separator Kit - Level 2
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:15744065
Part#: 114317400450-KT
Ships in 5 Business Days
Sale - Save 41% $ 231.99

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

$ 137.40 USD
Free Shipping on orders $49 and up
Sale - Save 41%
$ 231.99

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

$ 137.40 USD
Free Shipping on orders $49 and up
If you are ready to perform a truly complete oil separator system service, our Level 2 kit provides you with all of our Level 1 kit components plus a throttle body gasket, throttle body inlet boot, ICV grommet, and dipstick tube o-ring. Our Level 2 Cold Climate kit includes the following: Oil separator - BMW cold climate recommended Hose from oil separator to dipstick tube - BMW cold climate recommended Hose from oil separator to valve cover Hose from intake manifold back to the connector hose Hose from oil separator up to the intake manifold Throttle body gasket Throttle body inlet boot ICV rubber grommet Oil dipstick tube o-ring seal It is highly recommended to replace the oil dipstick tube with the updated design by BMW as this also a common place for sludge to build up.
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Crankcase Ventilation Refresh Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:57543744
Part#: 11158647962KT2
In Stock
New Item
Sale - Save 21% $ 265.99

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

$ 211.22 USD
Free Shipping on orders $49 and up
Sale - Save 21%
$ 265.99

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

$ 211.22 USD
Free Shipping on orders $49 and up
Maintain optimal engine vacuum and prevent oil blow-by failures under hard driving with this complete Crankcase Ventilation Refresh Kit. Aged oil separator valves and heat stressed plastic hoses fail unexpectedly, leading to oil ingestion, loss of power, and damaged rear main or valve cover gaskets from excessive crankcase pressure buildup. Designed as a direct fit refresh, this kit ensures crisp throttle response, proper engine breathing, and total peace of mind on the street or track.
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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
Bosch - Corporate Logo
T#:39261786
Part#: 18308514448
Ships in 1 Business Day
$ 350.99

This product was last offered at the strikethrough price on
10-30-2026

$ 348.99 USD
Free Shipping on orders $49 and up
$ 348.99 USD
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Bosch - Corporate Logo
T#:596905
Part#: F01C600252
Ships in 1 Business Day
$ 721.60

This product was last offered at the strikethrough price on
10-19-2026

$ 721.59 USD
Free Shipping on orders $49 and up
$ 721.59 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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Condor Speed Shop - Corporate Logo
T#:577861
Part#: M20BLK
Ships in 1 Business Day
$ 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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Bosch - Corporate Logo
T#:596872
Part#: 11787589139
Ships in 1 Business Day
$ 149.64

This product was last offered at the strikethrough price on
11-02-2026

$ 144.03 USD
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$ 144.03 USD
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Idle Control Valve Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:15744026
Part#: 11611437453-KT
In Stock
$ 173.13 USD
Free Shipping on orders $49 and up
Located in the intake system, this part is a common source of idle issues. This kit includes a new mount and idle control valve grommet
O2 Sensor Bung and Plug
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:339000
Part#: TEN9949O2S
Ships in 6 Business Days
Starting at $ 12.95 USD
Free Shipping on orders $49 and up
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.

Bosch - Corporate Logo
T#:591854
Part#: 11787512983
Back Ordered
$ 104.99

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

$ 73.99 USD
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$ 73.99 USD
Free Shipping on orders $49 and up
Length: 550mm