Womala Crankcase Breather Hose OE 1020941987 Black for Mercedes

Core Functions

• Crankcase Ventilation: The primary function is to discharge blow-by gas from the crankcase, reducing internal pressure and preventing oil leakage from seals or gaskets.
• Emission Control: Guides blow-by gas back to the intake system for re-combustion, reducing harmful hydrocarbon emissions and complying with environmental regulations.
• Oil Quality Protection: Prevents excessive pressure buildup in the crankcase from diluting engine oil or degrading its lubricating performance, extending oil service life.

 Compatible Vehicles

This Crankcase Breather Hose is tailored for the following Mercedes engines (duplicate entries are merged for clarity):

Notes: Crankcase Breather Hoses are engine-specific—even within the M 102 engine series, variants marked “AUSTRALIEN” (Australian specification) may have subtle differences in installation positions or lengths compared to standard M 102 engines. Confirm the exact specification via your vehicle’s VIN or Mercedes’ official parts catalog to avoid fitment errors (e.g., poor sealing, ventilation failure). During installation, ensure tight connection with crankcase and intake system interfaces to prevent air leakage. Regularly inspect for signs of failure (e.g., hose cracking, hardening, oil seepage) and replace the hose immediately if faults are detected to maintain normal crankcase ventilation.

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