BMW Genuine Coolant Vent Hose — F25 X3 / F26 X4
by BMW
Key Features
- OEM BMW part — exact factory replacement for F25 X3 and F26 X4 chassis
- Routes coolant vapor from engine to expansion tank, preventing pressure buildup
- Made from BMW-spec rubber compound rated for long-term heat and coolant exposure
- Direct plug-and-play fitment — no trimming, adapters, or modification required
- Eliminates coolant loss caused by cracked or collapsed vent hose failures
- Backed by BMW Genuine Parts warranty for peace of mind
Product Details
- Brand
- BMW
- Category
- Silicone Coolant Hoses
- ASIN
- B01JEFYTNU
Check if it fits your BMW
BMW Genuine Coolant Vent Hose — F25 X3 / F26 X4 — Overview
The coolant vent hose on your F25 X3 or F26 X4 plays a quiet but critical role in keeping your cooling system pressurized and functioning correctly. This small-diameter hose connects the engine cooling circuit to the expansion tank, allowing trapped air and coolant vapor to vent properly. When it cracks, collapses, or hardens with age, you'll often see unexplained coolant loss, air pockets in the system, or an engine that runs hotter than it should — symptoms that are easy to misdiagnose if you overlook this component.
This is a BMW Genuine part, meaning it comes off the same supply chain as the hose that left the factory on your vehicle. The rubber compound is formulated specifically to withstand BMW-spec coolant chemistry, sustained underhood heat, and the pressures typical of these inline-six cooling systems. You won't find the stiffness or premature cracking that often shows up with aftermarket alternatives sourced to a lower spec.
Fitment is exact for the F25 X3 and F26 X4 — both ends seat and clamp precisely as intended, with no stretching, trimming, or adapter hardware needed. If you're doing a preventative cooling system refresh, a thermostat housing job, or hunting down a subtle coolant leak, swapping this hose while you're in there is cheap insurance. Installation is straightforward for anyone comfortable working in the engine bay, and the correct routing follows the factory path without any guesswork.
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