Oil Separation & Breather System for BMW 5 Series E28 (1982-1988)

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Every car has a crankcase vent system that is supposed to suppress oil from making it into the intake ports and combustion chamber. A good functioning system will separate oil from the atmosphere and return it to the oil pan (or collect it in a catch can) while allowing the leftover vapors to burn in the combustion chamber or recirculate through the system. This has always been known as a PCV system (Positive Crankcase Ventilation) but BMW has several other names for it - oil separator, crankcase vent (CCV), and cyclonic separator. Failures in the system will allow raw oil to enter the intake and eventually into the engine itself which can have disastrous effects on engine performance and longevity. As emissions regulations on oil and gas venting have gotten more stringent the PCV systems have gotten more complex and failure prone. And because the CCV is intertwined with other systems you could experience rough running, loss of power, higher oil consumption, misfiring, stalling, or other annoying issues. There is no replacement interval for these so we recommend inspecting your crankcase vent system as part of your regular maintenance routines. Symptoms of a bad crankcase vent are: whitish or yellowish film on the underside of the oil cap, whistling/squealing noises (not caused by a belt), suction on the oil cap that makes it hard to unscrew, large amounts of white smoke from the exhaust, and excessive oil consumption.

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CCV/PCV Breather Hoses (4)

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ECS Tuning Baffled Oil Catch Can - 8oz

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T#:13496655

Part#: 003779ECS05-02

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05-03-2026

$ 222.11 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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Genuine BMW Breather Hose - E24 M6 E28 M5

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T#:32205

Part#: 11151306958

Ships in 2 Business Days

4% off MSRP $ 47.99

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$ 45.99 USD

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$ 47.99

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Genuine BMW VENT HOSE
Fits BMW Engines including:
S38

Genuine BMW Idle Speed Control Hose

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T#:367818

Part#: 13411710793

Ships in 5 Business Days

3% off MSRP $ 60.99

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$ 58.99 USD

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$ 60.99

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3 Pin Connector

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T#:33412930

Part#: 12521706096

In Stock

Sale - Save 11% $ 10.99

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

$ 9.78 USD

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Includes connector housing with terminals and seals. Commonly used for the idle air control valve (IACV).

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 12521706096 - Commonly used for the idle air control valve (IACV).

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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Vacuum Hose - E24, E28, E3, E30, E32, E34, E46, Z3

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T#:149270

Part#: 64111368684

Ships in 2 Business Days

8% off MSRP $ 12.99

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

$ 11.99 USD

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8% off MSRP

$ 12.99

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$ 11.99 USD

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Genuine BMW Vacuum Hose White - 2X4
This item fits the following BMW Chassis:
E30 M3,E34 M5,E46 M3,E30,E34,E46

Valve Cover Vent Hose - E30 325e 325i E28 528e E34 525i

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T#:6692

Part#: 11151708801

Ships in 6 Business Days

$ 18.99

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

$ 9.17 USD

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This is the engine PCV vent hose that connects to the valve cover. A cracked hose can lead to rough idle and poor running. Replace your dry or cracked hose today.1987-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
12/1986-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1990 E34 BMW 525i

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Oil Separation & Breather System for BMW 5 Series E28 (1982-1988)

Sub-Categories

ECS Tuning Baffled Oil Catch Can - 8oz

Genuine BMW Breather Hose - E24 M6 E28 M5

Genuine BMW Idle Speed Control Hose

3 Pin Connector

Vacuum Hose - E24, E28, E3, E30, E32, E34, E46, Z3

Valve Cover Vent Hose - E30 325e 325i E28 528e E34 525i

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