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Oil Separation & Breather System

Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could experience rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

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Genuine BMW - Corporate Logo
T#:219749
Part#: 11158647961
Ships in 1-2 days
5% off MSRP $ 477.99

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$ 455.99 USD
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5% off MSRP
$ 477.99

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

$ 455.99 USD
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Genuine BMW Vent Pipe - 11158647961
Genuine BMW - Corporate Logo
T#:375196
Part#: 11157840446KT3
Ships in 1-2 days
$ 397.99

This product was last offered at the strikethrough price on
07-06-2026

$ 395.99 USD
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$ 395.99 USD
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Genuine BMW - Corporate Logo
T#:376836
Part#: 11151747066KT
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$ 306.99 USD
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The hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
1996-09/1998 E39 BMW 540i

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Genuine BMW - Corporate Logo
T#:36621
Part#: 11617832298
Special Order: No Guaranteed ETA
3% off MSRP $ 72.99

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

$ 70.99 USD
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3% off MSRP
$ 72.99

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

$ 70.99 USD
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Genuine BMW Pipe
This item fits the following BMW Chassis:
E46 M3,E46

Fits BMW Engines including:
S54


Turner Oil Separator Valve Service Kit - E39 M5
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:555299
Part#: 11151406788KT3
Back Ordered
$ 326.99

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

$ 325.99 USD
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$ 325.99 USD
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The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

This kit includes the needed hoses, oil separator, mounting grommet, and hardware.

Fits the following BMWs:
1998-2003 E39 BMW M5

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ECS Tuning N54 PCV Valve Upgraded - BMW N54 3.0L
10X Entries Into Our F80 M3 Sweepstakes
ECS - Corporate Logo
T#:4154602
Part#: 090745ECS09
Special Order: No Guaranteed ETA
Sale - Save 25% $ 105.99

This product was last offered at the strikethrough price on
06-14-2026

$ 79.49 USD
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Sale - Save 25%
$ 105.99

This product was last offered at the strikethrough price on
06-14-2026

$ 79.49 USD
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The OEM plastic Positive Crankcase Ventilation (PCV) valve does not hold pressure well, even when brand new. This means that when you are in boost conditions, the highly pressurized PCV valve leaks charged air back into the crankcase. Depending on the condition of your PCV valve, this can range from irritating to dangerous. Additionally, if your valve cover is cracked, loose, or has a bad gasket, you are likely experiencing a pressure leak either internally or externally, as well as potential oil loss issues. ECS Tuning now offers a solid aluminum PCV valve upgrade designed to address these issues by preventing leaks and outlasting the standard BMW-designed PCV! The internal components of this aluminum PCV valve fit tighter than the OE design and can withstand significantly more abuse, perfect for high mileage N54s, N54s that have been tuned, or N54s with upgraded turbos (larger twin or big single turbo builds). This may not be your last PCV Valve, but it will certainly outlast both the Genuine BMW and other common aftermarket alternatives!
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FTP Motorsport - Corporate Logo
T#:583063
Part#: SG84036
Special Order: No Guaranteed ETA
$ 60.00 USD
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$ 60.00 USD
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The OEM plastic PCV valve does not hold pressure well even when brand new. What this means is that when the turbochargers are making boost, pressurized air can become forced backwards through the valve and back into the crankcase. Depending on the condition of your PCV valve this can range from irritating to dangerous as a pressurized case can cause all sorts of issues. Additionally, if your valve cover is cracked due to age or has a bad gasket you are more than likely experiencing a pressure leak either internally or externally. These two features can cause even a low-mileage N54 to run like a tired elephant, sometimes even unlocking a special bonus function known as "Limp Mode". The solution is to replace any failed components and upgrade the PCV valve to something more capable withstanding the abuse of a turbocharged environment. FTP Motorsport has you covered with this solid aluminum valve assembly. It is essentially the same thing that came in your car from the factory, made out of aluminum. The internal components have also been made to fit tighter and outlast the life of an off the shelf replacement. No, this won't be the very last PCV valve you buy, but it will most certainly alleviate a lot of headaches common to N54 owners. And if you're tuned, big twin or single swapped you need one of these yesterday.
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Packaged by Turner - Corporate Logo
T#:221962
Part#: TMS221962
Ships in 2 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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    Oil Separator Valve
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:594299
    Part#: 11617531423
    Ships in 4 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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    Crankcase Vent Hose - Cylinders 5-8
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384972
    Part#: 11617547186
    Ships in 4 Business Days
    $ 59.99 USD
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    $ 59.99 USD
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    Should be replaced anytime leaks are detected
    "Cold Climate" Crankcase Pressure Regulator Valve
    2X Entries Into Our F80 M3 Sweepstakes
    URO - Corporate Logo
    T#:376770
    Part#: 11617533400
    Ships in 2 Business Days
    $ 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
    Crankcase Vent Hose - Cylinders 1-4
    2X Entries Into Our F80 M3 Sweepstakes
    Rein - Corporate Logo
    T#:384973
    Part#: 11617547185
    Ships in 4 Business Days
    $ 57.99 USD
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    $ 57.99 USD
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    Should be replaced anytime leaks are detected


    PCV Adapter Fitting N54
    2X Entries Into Our F80 M3 Sweepstakes
    Vargas Turbo Technologies - Corporate Logo
    T#:557961
    Part#: VTT-PCV-ADAPTER
    Ships on Oct 14, 2026
    $ 145.99 USD
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    $ 145.99 USD
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    Vargas Turbo has you covered when you are installing a custom turbo setup. With all of the adapters you need and all the valves necessary, the only real limiting factor is your imagination!

    This is the adapter fitting that is required to convert your N54 to external PCV if you want to keep your crankcase under vacuum at idle, and anytime you have a vacuum condition in your intake manifold. They are made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip.

    This must be used in conjunction with  the Vargas billet check valve, and PCV delete fitting or requires plugging of the intake PCV ports. Installs inline on the throttle body, and adds a -8AN male to adapt to a catch cans, or any custom set up.

    Made from 6061-T6 with black anodizing for a long-lasting finish. Includes complete adapter, with all o-rings, and retaining clip

    This part fits the following BMW engines: 
    2006-2012 N54

     

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    Burgaflex - Corporate Logo
    T#:57725199
    Part#: 11617522933
    Ships in 9 Business Days
    New Item
    $ 20.99 USD
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    $ 20.99 USD
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    The Burgaflex Oil Separator Vent Hose is built to high engineering standards to withstand the harsh thermal environments of a hard-driven engine bay.
    Burgaflex - Corporate Logo
    T#:2721004
    Part#: 11617563477
    Ships in 9 Business Days
    $ 81.99 USD
    Free Shipping
    $ 81.99 USD
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    Maintain peak output and protect your vehicle from engine-robbing vacuum leaks with a high-performance replacement crankcase ventilation hose from Burgaflex.

    Burgaflex - Corporate Logo
    T#:641601
    Part#: 11617547186
    Ships in 9 Business Days
    $ 37.99 USD
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    $ 37.99 USD
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    This Burgaflex hose provides a seamless replacement engineered for long-term durability and reliable performance under high thermal loads.

    Genuine BMW - Corporate Logo
    T#:36550
    Part#: 11617563476
    Ships in 1-2 days
    4% off MSRP $ 136.99

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

    $ 130.99 USD
    Free Shipping
    4% off MSRP
    $ 136.99

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

    $ 130.99 USD
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    Genuine BMW Vent Pipe - Zyl. 1-4
    This item fits the following BMW Chassis:
    E53 48IS,E53 X5,E63,E65

    Fits BMW Engines including:
    N62

    Genuine BMW - Corporate Logo
    T#:376819
    Part#: 11617561408KT2
    Ships in 1-2 days
    $ 225.99

    This product was last offered at the strikethrough price on
    07-06-2026

    $ 222.99 USD
    Free Shipping
    $ 222.99 USD
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    Genuine BMW - Corporate Logo
    T#:375276
    Part#: 11617533400KT2
    Ships in 1-2 days
    $ 416.99

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

    $ 374.99 USD
    Free Shipping
    $ 374.99 USD
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    If you're ready for a complete, hassle free oil separator service, our kit builds on our core setup by adding crucial high wear rubber and sealing components to ensure maximum performance and zero vacuum leaks.
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    Genuine BMW - Corporate Logo
    T#:36176
    Part#: 11537838756
    Ships in 3 Business Days
    1% off MSRP $ 587.99

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

    $ 583.99 USD
    Free Shipping
    1% off MSRP
    $ 587.99

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

    $ 583.99 USD
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    Genuine BMW Return Pipe
    This item fits the following BMW Chassis:
    E46 M3,E85 Z4M,E46,E85 Z4,E86 Z4

    Fits BMW Engines including:
    S54


    Genuine BMW - Corporate Logo
    T#:36013
    Part#: 11537547171
    Ships in 1-2 days
    6% off MSRP $ 126.99

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

    $ 119.99 USD
    Free Shipping
    6% off MSRP
    $ 126.99

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

    $ 119.99 USD
    Free Shipping


    Genuine BMW Return Pipe, Heater -
    This item fits the following BMW Chassis:
    E70 X5

    Fits BMW Engines including:
    N62N


    Genuine BMW - Corporate Logo
    T#:35442
    Part#: 11427808154
    Ships in 1-2 days
    5% off MSRP $ 397.99

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

    $ 379.99 USD
    Free Shipping
    5% off MSRP
    $ 397.99

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

    $ 379.99 USD
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    Genuine BMW Return Pipe -
    This item fits the following BMW Chassis:
    E70 X5

    Fits BMW Engines including:
    M57

    Genuine BMW - Corporate Logo
    T#:58088
    Part#: 32416753823
    Ships in 4 Business Days
    2% off MSRP $ 174.99

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

    $ 170.99 USD
    Free Shipping
    2% off MSRP
    $ 174.99

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

    $ 170.99 USD
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    Genuine BMW Return Pipe Dynamic Drive -
    This item fits the following BMW Chassis:
    E65

    Genuine BMW - Corporate Logo
    T#:37151
    Part#: 11667564502
    Ships in 3 Business Days
    4% off MSRP $ 135.99

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

    $ 129.99 USD
    Free Shipping
    4% off MSRP
    $ 135.99

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

    $ 129.99 USD
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    Genuine BMW Vacuum Pipe
    This item fits the following BMW Chassis:
    E70 X5M,E71 X6M,E70 X5 X5,E71 X6,F15,F16

    Fits BMW Engines including:
    N51,N63,N63N,S63

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    Genuine BMW - Corporate Logo
    T#:15009
    Part#: 13717560227
    Ships in 1-2 days
    4% off MSRP $ 231.99

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

    $ 221.99 USD
    Free Shipping
    4% off MSRP
    $ 231.99

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

    $ 221.99 USD
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    When doing any sort of repair or maintenance there is no replacement for genuine factory parts. Turner Motorsport carries the Genuine BMW brand with pride and has the parts you need to complete your next project with confidence.


    Genuine BMW Heater Element
    This item fits the following BMW Chassis:
    E82 1M Coupe,E71 X6,E82,E89 Z4,E90,E92,E93,F01,F02

    Fits BMW Engines including:
    N54,N54T
     

     

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    Genuine MINI - Corporate Logo
    T#:14638
    Part#: 11667550007
    Ships in 1-2 days
    7% off MSRP $ 159.99

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

    $ 148.99 USD
    Free Shipping
    7% off MSRP
    $ 159.99

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

    $ 148.99 USD
    Free Shipping
    Genuine MINI SUCKING JET PUMP WITH LINES
    Fits BMW Engines including:
    W11

    Genuine BMW - Corporate Logo
    T#:575977
    Part#: 11151705272KT
    Ships in 7 Business Days
    $ 171.99 USD
    Free Shipping
    $ 171.99 USD
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    Oil Separator Kit | BMW E38 E39 M62 4.4L is designed to resolve common crankcase ventilation issues, ensuring optimal engine performance and reliability. BMW vehicles equipped with the M62 4.4L engine often experience oil separator failure, especially in cold weather, leading to excessive oil consumption, vacuum leaks, and potential engine damage. This complete kit replaces all critical components, preventing freezing and cracking caused by condensation buildup. Upgrading to a new oil separator system helps maintain proper oil vapor management, reducing the risk of oil leaks and performance issues.

    • Prevents common oil separator freezing and failure in cold weather
    • Helps eliminate excessive oil consumption and vacuum leaks
    • Direct-fit replacement for BMW E38 and E39 M62 4.4L engines
    • Includes all necessary components for a complete system overhaul
    • Restores proper crankcase ventilation for improved engine efficiency
    • Manufactured to meet or exceed OEM quality standards
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    Genuine BMW - Corporate Logo
    T#:36425
    Part#: 11611742324
    Ships in 7 Business Days
    2% off MSRP $ 169.99

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

    $ 166.99 USD
    Free Shipping
    2% off MSRP
    $ 169.99

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

    $ 166.99 USD
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    Genuine BMW Sound Absorber -
    This item fits the following BMW Chassis:
    E34

    Fits BMW Engines including:
    M60


    Genuine BMW - Corporate Logo
    T#:151009
    Part#: 64221972010
    Ships in 7 Business Days
    3% off MSRP $ 121.99

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

    $ 117.99 USD
    Free Shipping
    3% off MSRP
    $ 121.99

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

    $ 117.99 USD
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    Genuine BMW Breather Covering Rear
    This item fits the following BMW Chassis:
    E30 M3,E30

    Genuine BMW - Corporate Logo
    T#:35861
    Part#: 11531406921
    Ships in 7 Business Days
    3% off MSRP $ 224.99

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

    $ 217.99 USD
    Free Shipping
    3% off MSRP
    $ 224.99

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

    $ 217.99 USD
    Free Shipping


    Genuine BMW Return Pipe - Zyl. 5-8
    This item fits the following BMW Chassis:
    E39 M5,E39

    Fits BMW Engines including:
    S62


    Genuine BMW - Corporate Logo
    T#:35860
    Part#: 11531406918
    Ships in 7 Business Days
    3% off MSRP $ 224.99

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

    $ 217.99 USD
    Free Shipping
    3% off MSRP
    $ 224.99

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

    $ 217.99 USD
    Free Shipping


    Genuine BMW Return Pipe - Zyl. 1-4
    This item fits the following BMW Chassis:
    E39 M5,E39

    Fits BMW Engines including:
    S62

    Turner Emissions Service Kit - E46 M3
    10X Entries Into Our F80 M3 Sweepstakes
    Packaged by Turner - Corporate Logo
    T#:555304
    Part#: 11157840446KT9
    Ships on Jan 25, 2027
    $ 426.99

    This product was last offered at the strikethrough price on
    08-26-2026

    $ 412.99 USD
    Free Shipping
    $ 412.99 USD
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    The hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

    This kit includes the needed hoses, oil separator, and hardware.

    Fits the following BMWs:
    09/2004-2006 E46 BMW M3 - Manual Transmission

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    Turner Emissions Service Kit - E46 M3
    10X Entries Into Our F80 M3 Sweepstakes
    Packaged by Turner - Corporate Logo
    T#:555305
    Part#: 11157840446KT10
    Ships on Jan 25, 2027
    $ 296.99

    This product was last offered at the strikethrough price on
    08-26-2026

    $ 282.99 USD
    Free Shipping
    $ 282.99 USD
    Free Shipping

    The hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the plastic components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

    This kit includes the needed hoses, oil separator, and hardware.

    Fits the following BMWs:
    2001-09/2004 E46 BMW M3 - Manual Transmission

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    Turner Oil Separator Kit - E53 X5 M62 4.4L 4.6L
    10X Entries Into Our F80 M3 Sweepstakes
    Packaged by Turner - Corporate Logo
    T#:555308
    Part#: 11151705237KT1
    Back Ordered
    Sale - Save 11% $ 208.99

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

    $ 186.75 USD
    Free Shipping
    Sale - Save 11%
    $ 208.99

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

    $ 186.75 USD
    Free Shipping

    The rubber hoses and oil separator can crack or become faulty, leading to vacuum leaks or oil leaks. This is caused by the stress the components are exposed to during heating and cooling cycles, especially if the vehicle is not brought up to operating temperature during driving in cold weather climates.

    This kit includes the needed hoses, oil separator, and hardware.

    Fits the following BMWs:
    1999-2006 E53 BMW with M62 4.4L 4.6L

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    Genuine BMW - Corporate Logo
    T#:577309
    Part#: 11157840446KT5
    Back Ordered
    $ 613.99 USD
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    $ 613.99 USD
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