Emissions System for BMW 3 Series E46 (1999-2005)

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

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:2528129

Part#: 11617533400S1

In Stock

Sale - Save 30% $ 112.99

This product was last offered at the strikethrough price on
11-07-2026

$ 79.09 USD

Add to Wish List

Qty

Sale - Save 30%

$ 112.99

This product was last offered at the strikethrough price on
11-07-2026

$ 79.09 USD

Add to Wish List

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.

Show More Show Less

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

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:641646

Part#: 11617501566S1

In Stock

Sale - Save 30% $ 97.99

This product was last offered at the strikethrough price on
11-07-2026

$ 68.59 USD

Add to Wish List

Qty

Sale - Save 30%

$ 97.99

This product was last offered at the strikethrough price on
11-07-2026

$ 68.59 USD

Add to Wish List

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

Show More Show Less

Crankcase Vent Hose

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:30629661

Part#: 11157831311

In Stock

Sale - Save 30% $ 31.99

This product was last offered at the strikethrough price on
11-07-2026

$ 22.39 USD

Add to Wish List

Qty

Sale - Save 30%

$ 31.99

This product was last offered at the strikethrough price on
11-07-2026

$ 22.39 USD

Add to Wish List

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640207

Part#: 11617501566

In Stock

Sale - Save 30% $ 32.99

This product was last offered at the strikethrough price on
11-07-2026

$ 23.09 USD

Add to Wish List

Qty

Sale - Save 30%

$ 32.99

This product was last offered at the strikethrough price on
11-07-2026

$ 23.09 USD

Add to Wish List

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.

Show More Show Less

Leak Detection Pump - Priced Each

For vehicles with production date from 09/2001

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:35121140

Part#: 16137193479

In Stock

Sale - Save 25% $ 66.99

This product was last offered at the strikethrough price on
11-07-2026

$ 50.24 USD

Add to Wish List

Qty

Sale - Save 25%

$ 66.99

This product was last offered at the strikethrough price on
11-07-2026

$ 50.24 USD

Add to Wish List

Vacuum Control Valve

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:47850818

Part#: 11747810831

In Stock

Sale - Save 30% $ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD

Add to Wish List

Qty

Sale - Save 30%

$ 27.99

This product was last offered at the strikethrough price on
11-07-2026

$ 19.59 USD

Add to Wish List

Oil Separator Hose - E46, Z4

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:579880

Part#: 55080

In Stock

Sale - Save 30% $ 24.99

This product was last offered at the strikethrough price on
11-07-2026

$ 17.49 USD

Add to Wish List

Qty

Sale - Save 30%

$ 24.99

This product was last offered at the strikethrough price on
11-07-2026

$ 17.49 USD

Add to Wish List

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

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

For vehicles with production date from 01/2000

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640502

Part#: 11617504535

In Stock

Sale - Save 30% $ 24.99

This product was last offered at the strikethrough price on
11-07-2026

$ 17.49 USD

Add to Wish List

Qty

Sale - Save 30%

$ 24.99

This product was last offered at the strikethrough price on
11-07-2026

$ 17.49 USD

Add to Wish List

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.

Show More Show Less

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

For vehicles with production date from 01/2000

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:638072

Part#: 11617504536

In Stock

Sale - Save 30% $ 26.99

This product was last offered at the strikethrough price on
11-07-2026

$ 18.89 USD

Add to Wish List

Qty

Sale - Save 30%

$ 26.99

This product was last offered at the strikethrough price on
11-07-2026

$ 18.89 USD

Add to Wish List

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.

Show More Show Less

Crankcase Ventilation Hose

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:30629689

Part#: 11157532649

In Stock

Sale - Save 30% $ 15.99

This product was last offered at the strikethrough price on
11-07-2026

$ 11.19 USD

Add to Wish List

Qty

Sale - Save 30%

$ 15.99

This product was last offered at the strikethrough price on
11-07-2026

$ 11.19 USD

Add to Wish List

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:640147

Part#: 11611432559

In Stock

Sale - Save 30% $ 23.99

This product was last offered at the strikethrough price on
11-07-2026

$ 16.79 USD

Add to Wish List

Qty

Sale - Save 30%

$ 23.99

This product was last offered at the strikethrough price on
11-07-2026

$ 16.79 USD

Add to Wish List

Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine

Genuine BMW Vent Hose - E46 325Ci, E46 325i

T#:32270

Part#: 11157513756

Ships in 1-2 days

Sale - Save 16% $ 177.99

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

$ 148.91 USD

Add to Wish List

Qty

Sale - Save 16%

$ 177.99

This product was last offered at the strikethrough price on
05-14-2026

$ 148.91 USD

Add to Wish List

Genuine BMW Vent Hose -
This item fits the following BMW Chassis:
E46

Fits BMW Engines including:
M56

Oxygen Sensor - Front Or Rear Manifold

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:56797107

Part#: 11787523434

Ships on Dec 15, 2026

Sale - Save 30% $ 119.99

This product was last offered at the strikethrough price on
11-07-2026

$ 83.99 USD

Add to Wish List

Qty

Sale - Save 30%

$ 119.99

This product was last offered at the strikethrough price on
11-07-2026

$ 83.99 USD

Add to Wish List

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

10X Entries Into Our F80 M3 Sweepstakes 10X Entries For Our Spin To Win Sweepstakes!

T#:47439371

Part#: 02SB1815

Ships on Jun 10, 2027

Sale - Save 46% $ 3.99

This product was last offered at the strikethrough price on
11-07-2026

$ 2.14 USD

Add to Wish List

Qty

Sale - Save 46%

$ 3.99

This product was last offered at the strikethrough price on
11-07-2026

$ 2.14 USD

Add to Wish List

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

Show More Show Less

Project Cars

SELECT YOUR BMW

Emissions System for BMW 3 Series E46 (1999-2005)

Sub-Categories

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

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

Crankcase Vent Hose

Bav Auto Crankcase Pressure Regulator Valve - BMW M52 M54

Leak Detection Pump - Priced Each

Vacuum Control Valve

Oil Separator Hose - E46, Z4

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

Bav Auto Crankcase Ventilation Return Hose - E46 E39 E60 Z3

Crankcase Ventilation Hose

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

Genuine BMW Vent Hose - E46 325Ci, E46 325i

Oxygen Sensor - Front Or Rear Manifold

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

Select Vehicle

Purpose

Category

Brand

Price

Special Offers

Shipping

Narrow Results