CCV Oil Separator System for BMW Z3 (1996-2002)

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BMWs oil separator and crankcase ventilation system is excellent at what it does when properly maintained. Always inspect any visible hoses when you are under the hood and follow the manufacturers replacement schedule.
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Comprehensive Constant Pressure Valve Replacement Kit
Comprehensive Constant Pressure Valve Replacement Kit
Packaged by Turner - Corporate Logo
T#:557341
Part#: 11111318185TMSKT
In Stock
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$ 70.34 USD
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When your CPV O-ring fails it causes a slow oil leak on the passenger side of the engine, making an oily mess that frequently resembles a rear main seal leak. Replacing the CPV with an upgraded o-ring ensures a long-term solution to this common problem. 

The factory o-ring over time fails from heat cycling and oil exposure due to the Buna rubber used in OEM o-rings, while the included Viton Fluoroelastomer is resistant to a much higher temperature to ensure prolonged life without leaking. 

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Crankcase Vent Valve - E36, E39, Z3
Crankcase Vent Valve - E36, E39, Z3
Packaged by Turner - Corporate Logo
T#:14288
Part#: TMS14288
In Stock
Sale - Save 31% $ 47.99
$ 32.96 USD
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The crankcase vent valve (CVV) holds and releases oil vapors that build up in the engine. It's the same type of system previously known as a PCV valve and the same deficiencies exist. Over time, the CVV will become saturated and clogged with oil. When this happens, the oil-rich vapors from the engine will back up into the intake tract and eventually into the combustion chamber. The oil added to the gasoline/air mix will cause misfires, carbon deposits, rough running, and blue smoke out the tailpipe. Replacing the CVV every 70,000 miles will ensure the correct and clean ventilation of oil vapor.

Replacement of the CVV can be done without removing the intake manifold. But replacing it during an M50 Manifold upgrade is the perfect time.

This is a Genuine BMW crankcase vent and sealing grommet -
11151703484 - crankcase vent valve
13411733217 - sealing grommet

This item fits the following BMWs:
1996-1999 E36 BMW 323is 323ic 328i 328is 328ic M3
1997-1998 E39 BMW 528i
1997-1998 Z3 BMW Z3 2.8
1998-2000 Z3 BMW Z3 M Roadster M Coupe
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Bav Auto Crankcase Pressure Regulator Valve - E36 E39 Z3
Bav Auto Crankcase Pressure Regulator Valve - E36 E39 Z3
For vehicles with production date up to 09/1998
Bavarian Autosport - Corporate Logo
T#:638090
Part#: 11151703484
In Stock
Sale - Save 25% $ 37.99
$ 28.49 USD
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Sale - Save 25% $ 37.99
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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. You should also look into replacing your valve cover gasket when changing the separator.
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Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
Bremmen Crankcase Ventilation Hose - E39 E53 E60 E83 E46
For vehicles with production date up to 10/2003
Bremmen Parts - Corporate Logo
T#:640147
Part#: 11611432559
Ships on Aug 29, 2025
Sale - Save 25% $ 21.99
$ 16.49 USD
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Sale - Save 25% $ 21.99
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Crankcase Vent Hose - From Valve Cover to Oil Separator - Fit BMWs with the M52 or M54 6 cylinder engine
Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38
Bremmen Mounting Grommet Seal - BMW E36 E39 Z3 E34 E38
Up to Model Year 09/1998
Bremmen Parts - Corporate Logo
T#:640144
Part#: 13411733217
Ships Sep 24, 2025
Sale - Save 5% $ 7.99
$ 7.59 USD
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Sale - Save 5% $ 7.99
$ 7.59 USD
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This grommet is located on the back side of the PCV or idle control valve
Bav Auto Crankcase Pressure Regulator Valve - E46 M3, Z3 M Coupe/Roadster S54 3.2L
Bav Auto Crankcase Pressure Regulator Valve - E46 M3, Z3 M Coupe/Road...
Bavarian Autosport - Corporate Logo
T#:640503
Part#: 11157840446
Special Order: No Guaranteed ETA
Sale - Save 15% $ 41.99
$ 35.69 USD
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Sale - Save 15% $ 41.99
$ 35.69 USD
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This Bav Auto oil separator helps to remove oil from the air vented from the crankcase via a hose from the valve cover. When the crankcase vent valve fails it can cause excessive oil consumption, engine fault codes, and poor idle. This crankcase vent valve is also known as the Oil separator valve or PCV. 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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