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

Bremmen "Cold Climate" Crankcase Pressure Regulator Valve Kit - BMW M...

T#:2528129

Part#: 11617533400S1

In Stock

Sale - Save 14% $ 110.99

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

$ 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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Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

For vehicles with production date from 09/1998

T#:640207

Part#: 11617501566

In Stock

Sale - Save 20% $ 32.99

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

$ 26.39 USD

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$ 32.99

This product was last offered at the strikethrough price on
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$ 26.39 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 this and all the other components of the oil separator system 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. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4

For vehicles with production date from 09/1998

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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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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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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Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

For vehicles with production date from 01/2000

T#:638072

Part#: 11617504536

In Stock

Sale - Save 20% $ 26.99

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

$ 21.59 USD

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$ 21.59 USD

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This is the BMW crankcase return line that goes from the intake manifold to the top CCV connecting hose. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bav Auto Vent Hose - From Valve Cover to Oil Separator - E36 E39 Z3 ...

For Model year 1997-1998 only

T#:579869

Part#: 54546

Ships on Aug 11, 2026

Sale - Save 20% $ 26.99

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

$ 21.59 USD

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Leak Detection Pump - Priced Each

T#:35121140

Part#: 16137193479

Ships on Oct 6, 2026

Sale - Save 18% $ 65.99

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

$ 54.39 USD

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This product was last offered at the strikethrough price on
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$ 54.39 USD

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Vacuum Control Valve

T#:47850818

Part#: 11747810831

Ships on Sep 28, 2026

Sale - Save 21% $ 26.99

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

$ 21.21 USD

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$ 26.99

This product was last offered at the strikethrough price on
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$ 21.21 USD

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Bav Auto Crank Case Ventilation Valve - E31 E38 E39 M62 4.4L ...

T#:640206

Part#: 11617501563

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Sale - Save 20% $ 47.99

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

$ 38.39 USD

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An integral part of the emissions system, the PCV valve lets the crankcase breathe. This allows proper intake and exhaust flow, resulting in proper running and operation. When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes, and poor idle. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bremmen Crankcase Oil Seperator Valve - E38 E39 M62 4.4L

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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Sale - Save 16%

$ 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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Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

For vehicles with production date from 01/2000

T#:640502

Part#: 11617504535

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

$ 19.99 USD

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$ 19.99 USD

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Runs from the top of the oil separator up to rear of the intake manifold. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

For vehicles with production date from 09/1998

T#:640147

Part#: 11611432559

In Stock

Sale - Save 22% $ 23.99

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

$ 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

Oil Separator Hose - E46, Z4

T#:579880

Part#: 55080

In Stock

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

$ 19.99 USD

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Cold climate version for extra insulation! Fits all E46 and Z4 chassis equipped with an M54 engine.

Crankcase Ventilation Hose

For vehicles with production date from 09/1998

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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Oil Separator - Crankcase Ventilation System

For vehicles with production date from 09/1998

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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02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...

T#:47439371

Part#: 02SB1815

Ships on Feb 17, 2027

Sale - Save 39% $ 3.99

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

$ 2.44 USD

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$ 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

T#:640144

Part#: 13411733217

Back Ordered

Sale - Save 17% $ 9.99

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

$ 8.25 USD

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$ 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

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

Sub-Categories

Bremmen "Cold Climate" Crankcase Pressure Regulator Valve Kit - BMW M...

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

Bremmen Oil Separator Kit - Level 1 - E39 E46 E83 Z3 Z4

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

Bav Auto Vent Hose - From Valve Cover to Oil Separator - E36 E39 Z3 ...

Leak Detection Pump - Priced Each

Vacuum Control Valve

Bav Auto Crank Case Ventilation Valve - E31 E38 E39 M62 4.4L ...

Bremmen Crankcase Oil Seperator Valve - E38 E39 M62 4.4L

Bav Auto Upper Oil Separator Vent Tube - E36 E46 E60 E84 Z3 Z4 M54 M5...

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

Oil Separator Hose - E46, Z4

Crankcase Ventilation Hose

Oil Separator - Crankcase Ventilation System

02 SENSOR BUNG (WELD-ON TYPE) 304 STAINLESS STEEL (M18x1.5mm) ...

Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38

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