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

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

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T#:2528129

Part#: 11617533400S1

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11-07-2026

$ 79.09 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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Turner Universal Baffled Oil Catch Can Mounting Bracket Kit - BMW & M...

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T#:383333

Part#: 003779ECS06KT

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Sale - Save 30% $ 95.99

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

$ 67.19 USD

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If you don't wish to fabricate intricate brackets to mount your ECS Baffled Oil Catch Can we have the solution. ECS's three-piece bracket kit includes two options for securing the catch can. Choose from either a flat parallel mounting plate or a bent 90° mounting plate to give you 360° rotation for an infinitely adjustable mounting location.

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Leak Detection Pump - Priced Each

For vehicles with production date from 09/2001

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T#:35121140

Part#: 16137193479

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11-07-2026

$ 50.24 USD

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Crankcase Vent Hose

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T#:30629661

Part#: 11157831311

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11-07-2026

$ 22.39 USD

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

$ 115.41 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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ECS Tuning Baffled Oil Catch Can - 8oz

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T#:13496655

Part#: 003779ECS05-02

In Stock

Sale - Save 10% $ 238.99

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

$ 215.09 USD

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Upgrade Your BMW with ECS Baffled Oil Catch Can

Modern emission regulations require a closed PCV/Breather system for cleaner operation. However, inefficient oil particle capture can lead to excessive oil vapor ingestion, causing carbon buildup, reduced performance, and fuel economy. ECS Tuning's updated ECS Baffled Oil Catch Can, now with an easy-to-empty 1/4" drain fitting, is engineered to collect toxic blow-by gases, minimize carbon deposits, and reduce oil contamination within engine oil. Recirculating oil vapor ensures emissions compliance without venting to the atmosphere.

Key Features:
Highly Efficient Oil Separator: Strategically positioned 4 chamber baffle system maximizes oil/air separation and minimizes oil droplets in the intake tract.
Integrated Dipstick: Knurled and black anodized oil dipstick simplifies oil volume inspection.
Reservoir: Available in 6oz or 8oz capacity with a 1/4" NPT drain plug fitting.
Serviceable: Easily removable baffle plates and drain plug for cleaning.
Easy/Customizable Installation: Combine with the ECS Universal Bracket Kit for simplified installation and adjustable mounting locations.
Leak-Free Fittings: Machined -10AN ORB (O-Ring Boss) fittings available for secure connections (fittings sold separately).

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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

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T#:640147

Part#: 11611432559

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11-07-2026

$ 16.79 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 Kit - Level 1

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T#:15710823

Part#: E46M5411_61KT

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Sale - Save 40% $ 124.99

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

$ 74.97 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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Vacuum Control Valve

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T#:47850818

Part#: 11747810831

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11-07-2026

$ 19.59 USD

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Crankcase Ventilation Hose

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T#:30629689

Part#: 11157532649

In Stock

Sale - Save 30% $ 15.99

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11-07-2026

$ 11.19 USD

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Burgaflex Return Pipe - 11617504536 - E46, E39, E60, E83, E53 ...

For vehicles with production date up to 01/2000

T#:596611

Part#: 11617504536

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$ 17.99

This product was last offered at the strikethrough price on
09-26-2026

$ 13.99 USD

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$ 13.99 USD

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Keep your vehicle running crisp and leak-free with this premium return pipe manufactured by Burgaflex.

Burgaflex M52 M54 Crankcase Ventilation Hose (CCV) - 11157532649 - E4...

T#:596606

Part#: 11157532649

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$ 12.99 USD

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Maintain peak engine health and precise air-fuel control by replacing your worn or cracked factory breather assembly with a premium Burgaflex replacement.

Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Eac...

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T#:637408

Part#: 028092ECS11AKT

Ships on Jan 11, 2027

Sale - Save 30% $ 3.99

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11-07-2026

$ 2.79 USD

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Upgrade your exhaust system with the Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm). This high-quality weld bung is made from stainless steel, ensuring durability and resistance to corrosion. It features M18x1.5mm threads, making it compatible with most oxygen sensors. Perfect for custom exhaust setups or replacing damaged bungs, this weld bung is a must-have for any automotive enthusiast.

Made from high-quality stainless steel for durability and corrosion resistance
M18x1.5mm threads ensure compatibility with most oxygen sensors
Ideal for custom exhaust setups or replacing damaged bungs
Essential for automotive enthusiasts looking to upgrade their exhaust system

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Air Adjustment Unit/DISA Valve Kit

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T#:15677538

Part#: 11617533344-KT

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11-07-2026

$ 97.70 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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1.5mm X 51mm Metric Buna-N 70 O-ring

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T#:388889

Part#: N1.50X051

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11-07-2026

$ 3.89 USD

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1.5mm X 51mm Metric Buna-N 70 O-ring is the perfect sealing solution for various industrial applications. Made from high-quality Buna-N material, this O-ring provides reliable sealing performance, ensuring leak-free connections. With its metric sizing and 70 durometer hardness, it offers versatility and durability for a wide range of uses.

High-quality Buna-N material
Reliable sealing performance
Metric sizing for versatility
70 durometer hardness for durability

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Cold Climate Oil Separator Kit - Level 2

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T#:15744065

Part#: 114317400450-KT

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

$ 128.81 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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Idle Control Valve Kit

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T#:15744026

Part#: 11611437453-KT

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11-07-2026

$ 151.71 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

Oxygen Sensor - Front Or Rear Manifold

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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

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

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T#:47439371

Part#: 02SB1815

Ships on Jun 11, 2027

Sale - Save 46% $ 3.99

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

$ 2.14 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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SELECT YOUR BMW

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

Sub-Categories

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

Turner Universal Baffled Oil Catch Can Mounting Bracket Kit - BMW & M...

Leak Detection Pump - Priced Each

Crankcase Vent Hose

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

ECS Tuning Baffled Oil Catch Can - 8oz

Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46

Oil Separator Kit - Level 1

Vacuum Control Valve

Crankcase Ventilation Hose

Burgaflex Return Pipe - 11617504536 - E46, E39, E60, E83, E53 ...

Burgaflex M52 M54 Crankcase Ventilation Hose (CCV) - 11157532649 - E4...

Stainless Steel Oxygen Sensor (O2) Weld Bung (M18x1.5mm) - Priced Eac...

Air Adjustment Unit/DISA Valve Kit

1.5mm X 51mm Metric Buna-N 70 O-ring

Cold Climate Oil Separator Kit - Level 2

Idle Control Valve Kit

Oxygen Sensor - Front Or Rear Manifold

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

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