BMW Upper Radiator Vent Hose for F30 335i

F30

$14.29

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Key Features

Upper vent hose from radiator to expansion tank
Fits F30 application as listed
Common failure point on heat-cycled BMW cooling systems
Quick-connect style ends for straightforward replacement
Good idea during radiator or tank service
Check O-ring seating before locking both ends

Product Details

Category: Silicone Coolant Hoses
ASIN: B0B55XSPG5

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BMW Upper Radiator Vent Hose for F30 335i — Overview

This is the upper coolant vent hose that runs from the radiator to the expansion tank on F30 335i cars. It is one of those small plastic-and-rubber cooling pieces that gets brittle with heat cycles, then starts seeping or cracking at the fittings. If you are chasing a slow coolant loss or refreshing an aging F30 cooling system, this is the right kind of hose to replace before it leaves you topped off on the shoulder.

I would pick this when your original hose is leaking at the quick-connect ends, feels hard, or has been disturbed during other cooling work. It makes more sense than trying to reuse an old vent line once the locking tabs and seals have aged out. On BMW turbo cars, small cooling leaks rarely stay small for long, so replacing the hose outright is usually the cleaner fix.