Oil Separation & Breather System for BMW 5 Series G30 (2017+)

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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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ECS Tuning Baffled Oil Catch Can - 8oz

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:13496655

Part#: 003779ECS05-02

In Stock

Sale - Save 10% $ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 215.09 USD

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Sale - Save 10%

$ 238.99

This product was last offered at the strikethrough price on
06-14-2026

$ 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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Pressure Control Valve (PCV) Repair Kit

For models with the earlier Gen 1 B58 only - Not for use with the B58TU Engine

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:24079614

Part#: 11121025447

In Stock

Sale - Save 5% $ 288.99

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

$ 274.10 USD

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Sale - Save 5%

$ 288.99

This product was last offered at the strikethrough price on
06-25-2026

$ 274.10 USD

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BMW's B58 engine has been great, but one major weakness is the PCV valve. As stated by BMW, "The PCV's rubber diaphragm seal may fail, causing insufficient engine oil separation. As a result, the engine may emit blue/white smoke from the exhaust tailpipes, shudder during operation, and/or run with reduced power (limp mode). At idle, a high-frequency whistling noise may be heard in the engine compartment, and the malfunction indicator lamp (MIL) may also illuminate." If your BMW is experiencing these issues, there is a very likely chance your PCV has failed. If so we recommend replacing your PCV with this Genuine BMW repair kit! Don't want to spend over $200 for this fix? We also offer T#23980285 which also replaces this valve but at roughly 1/10th the price!

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BMW B58 PCV Repair & Premium Oil Service Kit

For models with the earlier Gen 1 B58 only - Not for use with the B58TU Engine

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:55749586

Part#: 83212365954KT13

In Stock

$ 211.99

This product was last offered at the strikethrough price on
07-09-2026

$ 211.26 USD

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$ 211.26 USD

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Fix the whistle, replace the brittle vent hose, and flush out the contaminated oil. This kit pairs the highly sought after PCV fix with a premium Liqui Moly Top Tec 6600 0W-20 oil service to give your engine a completely clean slate. When the integrated PCV diaphragm on your B58 tears, it causes a massive unmetered vacuum leak that pulls raw oil vapor directly into the combustion chambers. This doesn't just create a loud, embarrassing whistling noise at idle—it causes poor air/fuel mixtures that force raw, unburned fuel past the piston rings. This blow-by heavily dilutes your engine oil, destroying its ability to properly lubricate the bearings and timing chain. Fixing the PCV using this Bremmen repair kit (which saves you from buying an entirely new valve cover) is only half the battle. You absolutely must get that compromised oil out of the crankcase. This comprehensive service kit includes the Bremmen PCV repair cap, the fragile corrugated crankcase breather hose that almost always snaps during the repair process, and a complete premium oil change. We've included Liqui Moly Top Tec 6600 0W-20, which carries the strict BMW LL-17 FE+ approval. This ultra-modern, low-friction oil ensures instant lubrication to the turbocharger upon cold start while maximizing fuel efficiency. Paired with a fresh OEM Mann oil filter, this kit completely reverses the collateral damage of a PCV failure. Kit Includes: (1) PCV Valve Repair Kit (Replaces OE # 11121025447) (1) CCV / Crankcase Vent Hose (Replaces OE # 11157637521) (1) Liqui Moly Top Tec 6600 0W-20 Engine Oil - 7 Liters (BMW LL-17 FE+ Approved) (1) Hengst Oil Filter Kit with O-Rings (Replaces OE # 11428583898) (1) Oil Drain Plug with Crush Washer

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Crank Case Ventilation Valve - Priced Each

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:53326230

Part#: 11158647299

Ships on Sep 8, 2026

Sale - Save 20% $ 80.99

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

$ 64.79 USD

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Sale - Save 20%

$ 80.99

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

$ 64.79 USD

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Oil Separation & Breather System for BMW 5 Series G30 (2017+)

ECS Tuning Baffled Oil Catch Can - 8oz

Pressure Control Valve (PCV) Repair Kit

BMW B58 PCV Repair & Premium Oil Service Kit

Crank Case Ventilation Valve - Priced Each

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