Emissions System

Performance Oil Separator Kit - M52/S52

T#:51356040

Part#: 059015LA02KT2KT

Ships on Oct 5, 2026

Sale - Save 19% $ 104.99

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

$ 84.77 USD

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Sale - Save 19%

$ 104.99

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

$ 84.77 USD

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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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Crank Case Vent Hose Kit - S63 4.4L Engine

T#:23913949

Part#: CRNKVENTKITKT

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$ 224.99 USD

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$ 224.99 USD

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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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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

T#:24344785

Part#: M54OILSEPKT

In Stock

Sale - Save 23% $ 173.99

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

$ 133.54 USD

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Sale - Save 23%

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

$ 133.54 USD

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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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Oil Separator Kit - Level 1

T#:15710823

Part#: E46M5411_61KT

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Sale - Save 24% $ 123.99

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

$ 93.71 USD

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Sale - Save 24%

$ 123.99

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

$ 93.71 USD

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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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Air Adjustment Unit/DISA Valve Kit

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 O-Ring - E32, E34, E38, E39

T#:592731

Part#: 07119906360

In Stock

$ 3.99

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

$ 2.99 USD

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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!

Profile-gasket 11611729728

T#:18889

Part#: 11611729728

In Stock

$ 4.99

This product was last offered at the strikethrough price on
04-06-2026

$ 4.07 USD

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$ 4.07 USD

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PROFILE-GASKET 11611729728 Manufactured by Reinz

Victor Reinz O-Ring - E70, E90

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!.

Cold Climate Oil Separator Kit - Level 2

T#:15744065

Part#: 114317400450-KT

In Stock

Sale - Save 41% $ 231.99

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

$ 137.46 USD

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Sale - Save 41%

$ 231.99

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

$ 137.46 USD

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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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Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52

T#:56110313

Part#: 11787558055KT

In Stock

$ 307.99

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

$ 304.99 USD

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$ 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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Rear Oxygen Sensor Set - N52, N54

T#:55353594

Part#: 11787545074/5KT2

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$ 366.99 USD

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$ 366.99 USD

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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.

Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

T#:55857772

Part#: 11787589475KT2

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$ 335.99 USD

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$ 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.

Front Oxygen Sensor Set - E9x, E82, E88, Z4

T#:55317713

Part#: BFR1/2O2SKT2

In Stock

$ 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

Victor Reinz Secondary Air Pump Valve Gasket - E60, E63, E64, E65, E9...

T#:375264

Part#: 11727506214

In Stock

$ 7.30

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

$ 7.26 USD

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$ 7.26 USD

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Goes between the valve and intake tube

Oil Separator kit - N63

T#:56291074

Part#: 11158636540KT2

Ships in 3 Business Days

$ 429.67 USD

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$ 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 Oil Separator O-Ring - E31, E32, E34, E38, E39 ...

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

Idle Control Valve Kit

T#:15744026

Part#: 11611437453-KT

In Stock

$ 173.13 USD

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$ 173.13 USD

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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

T#:339000

Part#: TEN9949O2S

Ships in 6 Business Days

Starting at $ 12.95 USD

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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.

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Performance Oil Separator Kit - M52/S52

Crank Case Vent Hose Kit - S63 4.4L Engine

Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...

Oil Separator Kit - Level 1

Air Adjustment Unit/DISA Valve Kit

Victor Reinz O-Ring - E32, E34, E38, E39

Profile-gasket 11611729728

Victor Reinz O-Ring - E70, E90

Cold Climate Oil Separator Kit - Level 2

Bosch Oxygen Sensors - Bank 1 And 2 Pre-Cat - N52

Rear Oxygen Sensor Set - N52, N54

Bosch Oxygen Sensor Set - Pre and Post Catalytic Converter - N55 ...

Front Oxygen Sensor Set - E9x, E82, E88, Z4

Victor Reinz Secondary Air Pump Valve Gasket - E60, E63, E64, E65, E9...

Oil Separator kit - N63

Victor Reinz Oil Separator O-Ring - E31, E32, E34, E38, E39 ...

Idle Control Valve Kit

O2 Sensor Bung and Plug

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