Hose Breather Lower (Topran) (M271) (Mercedes-Benz C-Class W203 / W204 / E-Class W211 / W212 / CLK-Class W209 / SLK-Class R171) is a specific mechanical component designed for several Mercedes-Benz models across the C-Class, E-Class, CLK-Class, and SLK-Class ranges. This hose breather part is linked to the M271 engine series commonly found in these vehicles. Its function is to manage crankcase ventilation by allowing gases to escape from the engine, helping maintain optimal pressure levels and prevent buildup inside the engine casing.
This breather hose fits in the lower section of the engine’s ventilation system and should be compared carefully with the original part by its connection type and placement to ensure compatibility. It is important to match this component on vehicles spanning model codes W203, W204, W211, W212, W209, and R171 for correct operation. Buyers should confirm their vehicle’s engine type and model details against this listing before purchase.
Maintaining an effective hose breather is critical for engine health, as it prevents pressure buildup that can lead to oil leaks or other mechanical issues. This unit is branded Topran and serves as a replacement part option under SKU BB-251833. For any uncertainties about fitment or related needs, consulting a technical advisor or submitting a request for a specific part is recommended.
- Matches Mercedes-Benz M271 engine ventilation system
- Applicable to multiple C-Class and E-Class models and related series
- Essential for controlling engine crankcase pressure
If this repair may need matching clips, brackets, lights, panels or more than one part, check more General, Quick Repair Bundle or Request a Part before ordering.





