YEHERIT Engine Coolant Expansion Tank for BMW X5/X6 (17138621092) with Sensor & Cap, Heat-Resistant PA

YEHERIT 17138621092 is a direct-fit engine coolant expansion reservoir with integrated sensor and cap designed to restore proper coolant containment and pressure control on compatible BMW X5/X6 models.

This replacement expansion tank is manufactured from heat-resistant PA plastic and includes the coolant level sensor and pressure cap needed to match original equipment performance. It fits a range of BMW E70/F85/F15 and E72/F86/E71/F16 vehicles (model years 2007–2019) and carries multiple OE cross-reference numbers so you can confirm fit before purchase. Built to tolerate engine bay heat, road vibration, and frequent temperature cycling, the tank stores excess coolant during operation and returns it to the radiator as the engine cools, helping the cooling system maintain stable pressure.

Will this coolant reservoir fit my BMW X5 or X6?

The YEHERIT 17138621092 is designed to match OEM form and fit for specific BMW X5 and X6 model families produced between 2007 and 2019. Use the OE replacement numbers or your vehicle’s year/make/model to verify compatibility before ordering.

• Compatible models: X5 (E70, F85, F15 series) and X6 (E72, F86, E71, F16 series).
• Supported engine sizes: 2.0L, 3.0L, 4.4L, 4.8L depending on model.
• OE cross-references: 17137552546, 17138621092, 17137647290, 17138630170, 603-361, 603361.

How does the tank function within the cooling system?

This expansion tank collects coolant that expands as the engine warms and releases excess pressure through the cap and return pathways. When the engine cools, the stored coolant flows back into the radiator, helping to maintain the proper coolant level and system pressure without air ingress.

• Stores overflow coolant during thermal expansion.
• Works with the pressure cap and sensor to maintain stable cooling-loop pressure.
• Prevents air pockets by allowing coolant to return to the radiator as temperatures drop.

What materials and quality features does this replacement offer?

Constructed from durable PA (polyamide) plastic, the tank resists heat and vibration typical of engine compartments. It includes the coolant-level sensor mounting and a matching pressure cap to ease installation and match OEM functionality.

• Heat-resistant PA plastic construction for thermal stability.
• Preconfigured sensor port compatible with factory sensors.
• Supplied with a pressure cap engineered to match original specifications.

Is there warranty and after-sales support?

YEHERIT backs this expansion tank with a one-year unlimited-mileage guarantee against manufacturing defects and fitment issues. Customer inquiries are addressed promptly with a 48-hour response window for support and replacement guidance.

• One-year unlimited-mileage warranty for peace of mind.
• 48-hour customer service response for fitment or product questions.
• Return or replacement handled per warranty terms if defects arise.

Who is this for: This YEHERIT 17138621092 coolant reservoir is intended for DIY enthusiasts and professional technicians replacing a cracked, leaking, or malfunctioning expansion tank on BMW X5/X6 models within the stated years. It's especially useful when you need a drop-in OEM-compatible part that includes the sensor interface and correct pressure cap, restoring proper coolant containment and helping the cooling system operate as designed. Always verify fitment with your vehicle identification or OE part numbers before purchase and follow proper coolant handling and disposal practices during installation.