Emissions System for BMW 5 Series E39 (1996-2003)

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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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Bremmen "Cold Climate" Crankcase Pressure Regulator Valve Kit - BMW M...
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T#:2528129
Part#: 11617533400S1
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$ 94.99 USD
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BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. 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. Don't forget to order a valve cover gasket, throttle body gasket, and a new intake boot to make your separator change easier and more comprehensive.
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Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4
For vehicles with production date from 09/1998
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Bremmen Parts - Corporate Logo
T#:641646
Part#: 11617501566S1
In Stock
Sale - Save 15% $ 95.99

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

$ 81.59 USD
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$ 95.99

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

$ 81.59 USD
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BMW has an ongoing issue with oil separators freezing in cold weather if driving is done before the vehicle is fully warmed up. There is often a howling noise followed by numerous oil leaks. The crankcase breather valve is used to purge the oil vapor from the engine block into the valve cover. However, sometimes condensation can cause it to freeze, causing the entire oil separator system to fail, crack, and disintegrate. Replace all the components of the oil separator system together to prevent damage to all the aspects of your engine. 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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Performance Oil Separator Kit - M52/S52
For vehicles with production date up to 09/1998
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Packaged by Turner - Corporate Logo
T#:51356040
Part#: 059015LA02KT2KT
Ships on Oct 5, 2026
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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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$ 104.99

This product was last offered at the strikethrough price on
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$ 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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Engine Oil Separator Package - Level 2 - E46 325, E39 525i M54 ...
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T#:24344785
Part#: M54OILSEPKT
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$ 133.54 USD
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$ 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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Leak Detection Pump - Priced Each
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Bremmen Parts - Corporate Logo
T#:35121140
Part#: 16137193479
Ships on Oct 6, 2026
Sale - Save 18% $ 65.99

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$ 54.39 USD
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$ 65.99

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Turner Oil Separator Kit - E39 M54
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T#:555298
Part#: 11617501566KT6
In Stock
Sale - Save 19% $ 181.99

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05-03-2026

$ 147.02 USD
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$ 147.02 USD
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The plastic 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:
2000-2003 E39 BMW 530i

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Vacuum Control Valve
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Bremmen Parts - Corporate Logo
T#:47850818
Part#: 11747810831
Ships on Oct 15, 2026
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$ 21.21 USD
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Genuine BMW Crankcase Ventilation Dipstick Hose
For use in cold climates
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Genuine BMW - Corporate Logo
T#:348228
Part#: 11157532629
In Stock
Sale - Save 8% $ 38.99

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

$ 35.88 USD
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$ 38.99

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

$ 35.88 USD
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Bremmen Crankcase Oil Seperator Valve - E38 E39 M62 4.4L
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Bremmen Parts - Corporate Logo
T#:640156
Part#: 11151705272
Special Order: No Guaranteed ETA
Sale - Save 16% $ 34.99

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

$ 29.47 USD
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$ 34.99

This product was last offered at the strikethrough price on
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$ 29.47 USD
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BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to the dipstick, valve cover, and air intake.
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Oil Separator - Crankcase Ventilation System
For vehicles with production date from 09/1998
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Bremmen Parts - Corporate Logo
T#:8741202
Part#: 11151705272B
In Stock
Sale - Save 17% $ 22.99

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

$ 19.07 USD
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$ 22.99

This product was last offered at the strikethrough price on
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$ 19.07 USD
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BMW has an issue with oil separators freezing in cold weather if the engine is not fully warmed up during driving. Common symptoms are a howling noise followed by oil leaks. Crankcase breather valve used to purge the oil vapor from the engine block into the valve cover. This valve has 4 hoses connected to it, running to dipstick, valve cover, air intake.
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Crankcase Ventilation Hose
For vehicles with production date from 09/1998
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Bremmen Parts - Corporate Logo
T#:30629689
Part#: 11157532649
In Stock
Sale - Save 24% $ 15.99

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

$ 12.23 USD
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$ 12.23 USD
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Vaico Oil Separator Valve - E38, E39
For vehicles with production date from 09/1998
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Vaico - Corporate Logo
T#:363292
Part#: 11151705272
In Stock
Sale - Save 22% $ 31.99

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

$ 25.09 USD
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Connects to the vent tube which is attached to the PCV valve


Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
For vehicles with production date from 09/1998
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Bremmen Parts - Corporate Logo
T#:640147
Part#: 11611432559
In Stock
Sale - Save 22% $ 23.99

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$ 18.76 USD
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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine
02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...
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Bremmen Parts - Corporate Logo
T#:47439371
Part#: 02SB1815
Ships on Feb 4, 2027
Sale - Save 39% $ 3.99

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$ 2.44 USD
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Easily add an oxygen sensor to your custom exhaust setup with this universal O2 sensor bung. Designed for simple weld-on installation, it allows you to place your sensor exactly where you need it—perfect for custom builds, exhaust modifications, or performance tuning projects.

Features:

CNC-cut from T304 Stainless Steel for corrosion resistance
Threaded for M18x1.5mm RH oxygen sensors

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Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38
Up to Model Year 09/1998
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Bremmen Parts - Corporate Logo
T#:640144
Part#: 13411733217
Back Ordered
Sale - Save 17% $ 9.99

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$ 8.25 USD
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This grommet is located on the back side of the PCV or idle control valve