Keep crankcase blow-by vapors flowing where they belong with the SKP Engine Crankcase Breather Hose (SK121292). This breather hose is a direct-fit replacement for a wide range of BMW L6-3.0L applications — including the 2011-2013 135i, 2011-2013 335i, 2011-2016 535i, 2012-2015 640i, 2011-2016 X3 and 2011-2017 X5/X6 — plus the 2011-2013 X5 with the V8-4.4L. See the Buyer's Guide tab for the full list of covered models and years.
- Crankcase ventilation: Carries crankcase blow-by gases through the intended ventilation path, helping route vapors and limit oil-mist escape.
- Per-application quantity: One hose per application; order the quantity your engine requires.
- Engine coverage: Cataloged for BMW L6-3.0L and V8-4.4L engines on the listed applications.
- Country of origin: China.
Over time crankcase breather hoses can crack, harden, or split, allowing unmetered air in or oil vapor out. If a failed breather hose is the cause of your symptoms, this replaces it. Confirm your specific model, year and engine in the Buyer's Guide before ordering.
Manufacturer part number SK121292.
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this breather hose do?
It routes crankcase blow-by gases through the engine's intended ventilation path, helping carry vapors away and limit oil-mist escape. It manages ventilation rather than stopping blow-by itself.
Which vehicles does the SK121292 fit?
It fits a range of BMW L6-3.0L models such as the 135i, 335i, 535i, 640i, X1, X3, X5 and X6, plus the 2011-2013 X5 with the V8-4.4L. Check the Buyer's Guide tab for your exact year and engine.
How many hoses do I need?
The facts list one hose per application. Order the quantity your specific engine requires, and confirm it against the Buyer's Guide for your vehicle.
What are signs this hose may need replacing?
Cracked, hardened, or split hose material, and unmetered air entering or oil vapor escaping the ventilation path. Diagnose the cause before replacing, as symptoms can have other sources.
Where is this part made?
The country of origin is China.
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