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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#:13051
Part#: 11787506539
In Stock at Vendor
$ 142.38

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

$ 115.98 USD
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$ 115.98 USD
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BMW LAMBDA MONITOR SENSOR - Bosch BMW Oxygen Sensor
Burger Motorsports - Corporate Logo
T#:46993589
Part#: G3B58OCC
Ships on Sep 9, 2026
Starting at $ 219.00 USD
Free Shipping on orders $49 and up
Starting at $ 219.00 USD
Free Shipping on orders $49 and up
It's no secret that B58 BMW turbo motors can suffer from oil control problems, causing the oil to blow through and coat the intercooler and charge piping, gunking up intake valves and the VANOS system, lowering the effective octane, and generally degrading engine performance. The higher your boost levels and the higher the mileage, the more apparent these problems become. The solution to this problem has finally arrived. The Burger Motorsports oil catch can. While there are other catch cans on the market, they all fall short in various areas. Some are mounted on the hot/turbo side of the motor, preventing proper vapor condensation. Others utilize hoses that are too small and runs that are too long to allow proper PCV ventilation, causing internal motor/ring sealing issues. Some have insufficient or no internal baffle systems, while others have internal baffle systems that are too restrictive. Some even bypass the PCV system altogether, venting crankcase gas and odor to the atmosphere. Most are simply repackaged oil catch cans from smaller/lower power motors shoehorned into place in the turbo BMW engine bay. To solve these problems, Burger Motorsports designed their oil catch can kit from the ground up specifically for the 2025 and newer Gen 3 B58 turbo BMW application. It features 100% CNC machining with zero welding for a precision fit and long life. The can itself is guaranteed for the life of the vehicle. The hoses exceed the OEM PCV piping in diameter, and that flow rate is maintained throughout the entire oil catch can, ensuring no excessive crankcase pressure buildup. The BMS OCC retains the factory fully closed loop PCV operation, preventing any PCV vapor from leaking to the atmosphere. The mounting locations are selected to minimize the line length, allow more efficient operation, and retain a stealth look. Installation takes around 20 minutes, includes all required hardware, and is 100% reversible. Simply unscrew the base of the can or use the drain plug to safely dispose of captured oil with the rest of your used motor oil during oil changes.
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URO - Corporate Logo
T#:2853
Part#: 11611432559
Ships in 1 Business Day
$ 14.99 USD
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$ 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 - 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.

Pierburg - Corporate Logo
T#:369787
Part#: 11727540471
Ships in 2 Business Days
$ 130.99

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

$ 117.14 USD
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$ 117.14 USD
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Located on the cylinder head, allows air to enter into the exhaust
URO - Corporate Logo
T#:37757223
Part#: 11727571591
Ships in 1 Business Day
$ 181.99 USD
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**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#:591939
Part#: 11787537993
Ships in 1-2 days
$ 177.44

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

$ 156.99 USD
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$ 156.99 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. 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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Burger Motorsports - Corporate Logo
T#:38688917
Part#: BMS-OCC-G2B58X
Ships on Sep 9, 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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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

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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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
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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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.


URO - Corporate Logo
T#:378279
Part#: 11617533398
Ships in 1 Business Day
$ 21.99 USD
Free Shipping on orders $49 and up
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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Bosch - Corporate Logo
T#:380990
Part#: 11787521705
In Stock at Vendor
$ 222.76

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

$ 211.63 USD
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$ 211.63 USD
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Length: 620mm
Pierburg - Corporate Logo
T#:7046
Part#: 11721433818
In Stock at Vendor
$ 631.99

This product was last offered at the strikethrough price on
03-23-2026

$ 557.99 USD
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$ 557.99 USD
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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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URO - Corporate Logo
T#:600041
Part#: 11127547058
Ships in 1 Business Day
$ 14.99 USD
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Rein - Corporate Logo
T#:384972
Part#: 11617547186
Ships in 3 Business Days
$ 59.99 USD
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$ 59.99 USD
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Should be replaced anytime leaks are detected
Rein - Corporate Logo
T#:17704764
Part#: 11158647298
In Stock at Vendor
$ 61.80 USD
Free Shipping on orders $49 and up
Designed to be a direct fit for OEM hoses, Rein has replacements for an affordable cost.

Bosch - Corporate Logo
T#:14665
Part#: 11787540167
Ships in 1-2 days
$ 206.82

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

$ 188.99 USD
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$ 188.99 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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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
Free Shipping on orders $49 and up
Critical crankcase ventilation cyclone separator - great replacement or custom install!

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
Free Shipping on orders $49 and up
$ 20.99 USD
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Critical crankcase ventilation cyclone separator - great replacement or custom install!

Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 5 Business Days
$ 458.99 USD
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$ 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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    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
    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.


    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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    Vargas Turbo Technologies - Corporate Logo
    T#:557961
    Part#: VTT-PCV-ADAPTER
    Ships in 10 Business Days
    $ 145.99 USD
    Free Shipping
    $ 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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    Bosch - Corporate Logo
    T#:578980
    Part#: 16808
    Ships in 1-2 days
    $ 134.99

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

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

    Burger Motorsports - Corporate Logo
    T#:38688932
    Part#: BMSCC-S63TU
    Ships on Sep 9, 2026
    $ 399.00 USD
    Free Shipping on orders $49 and up
    The **Burger Motorsports Oil Catch Can** is the **ultimate solution** for **S63TU BMW turbo engines**, tackling **oil control issues** like **blow-by, intake valve buildup, VANOS contamination**, and **reduced performance—especially at higher boost levels**. ### **Key Features & Benefits:** ✅ **Prevents Oil Blow-By** – Keeps the **intercooler, charge pipes, and intake valves clean** ✅ **Optimized Airflow** – Large-diameter hoses maintain **OEM PCV flow rates**, preventing pressure buildup ✅ **Precision CNC Construction** – 100% **CNC-machined, no welding**, ensuring **durability and longevity** ✅ **Fully Closed-Loop System** – No vapor leaks, maintaining **emissions compliance** ✅ **Strategic Mounting Locations** – **Shorter line runs** improve efficiency and maintain a **stealthy look** ✅ **Easy Maintenance** – Simply **unscrew the base** or use the **drain plug** for quick oil disposal ✅ **Fast 20-Minute Installation** – **All necessary hardware included** and **fully reversible** 🔧 **Built for Performance. Engineered for Longevity. Proudly Made in the USA.** 🔥
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    Bosch - Corporate Logo
    T#:380994
    Part#: 11787512002
    Ships in 1-2 days
    $ 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
    Crankcase Ventilation Hose
    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

    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
    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

    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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    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
    Bosch - Corporate Logo
    T#:639143
    Part#: 16197244137
    Ships in 2 Business Days
    $ 523.99

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

    $ 509.94 USD
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    $ 509.94 USD
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    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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    Pierburg - Corporate Logo
    T#:591851
    Part#: 11721437911
    Ships in 2 Business Days
    $ 308.99

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

    $ 164.70 USD
    Free Shipping
    $ 164.70 USD
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    Keep your engine running efficiently
    Bosch - Corporate Logo
    T#:596865
    Part#: 11787589138
    Ships in 2 Business Days
    $ 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#:373991
    Part#: 11727837456
    Ships in 2 Business Days
    $ 268.15

    This product was last offered at the strikethrough price on
    03-23-2026

    $ 173.98 USD
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    $ 173.98 USD
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    Also known as an EGR valve


    Rein - Corporate Logo
    T#:55821694
    Part#: 11127547058
    Ships in 3 Business Days
    New Item
    $ 16.99 USD
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    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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    Vargas Turbo Technologies - Corporate Logo
    T#:49822558
    Part#: VTTB58CHECK
    Ships in 10 Business Days
    $ 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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    Pierburg - Corporate Logo
    T#:56580202
    Part#: 11668634120
    In Stock at Vendor
    New Item
    $ 612.41 USD
    $ 612.41 USD
    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.

    FAE - Corporate Logo
    T#:31556134
    Part#: 11780872674
    Ships in 8 Business Days
    $ 74.99 USD
    Free Shipping
    $ 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
    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.
    BorgWarner - Corporate Logo
    T#:44597309
    Part#: 11717810871
    Ships in 2 Business Days
    $ 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#:49822559
    Part#: VTTS58CHECK
    Ships in 10 Business Days
    $ 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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    Bosch - Corporate Logo
    T#:39261786
    Part#: 18308514448
    Ships in 2 Business Days
    $ 317.99

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

    $ 294.99 USD
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    $ 294.99 USD
    Free Shipping on orders $49 and up