BMW Coolant Expansion Tank 17138621092 | Genuine BMW

Genuine BMW Coolant Expansion Tank 17138621092

The Genuine BMW Coolant Expansion Tank 17138621092 is an important component of the BMW engine cooling system. Also known as a coolant reservoir, expansion tank or coolant overflow tank, it provides space for coolant to expand and contract as engine temperature changes.

BMW OE number 17 13 8 621 092 is a genuine BMW replacement coolant expansion tank designed for selected BMW X5 and X6 applications. The part supersedes earlier BMW references including 17137552546, 17137647290 and 17138630170.

BMW Part Details

BMW Part Number: 17138621092
BMW OE Number: 17 13 8 621 092
Part Description: Coolant Expansion Tank
Also Known As: Coolant Reservoir, Expansion Tank, Coolant Overflow Tank
System: Engine Cooling System
Brand: Genuine BMW
Position: Left/driver side on applicable vehicles
Supersedes: 17137552546, 17137647290, 17138630170

Compatible BMW Models

Part 17138621092 is listed for selected BMW applications including:

BMW X5 E70 – 3.0d, 3.0si, 3.5d, xDrive30i, xDrive35d, xDrive35i, xDrive48i and xDrive50i
BMW X5 F15 – selected xDrive35i, xDrive35d, xDrive40e and xDrive50i applications
BMW X5 M E70/F85 – selected applications
BMW X6 E71 – selected xDrive35i, xDrive50i and ActiveHybrid applications
BMW X6 F16 – selected sDrive35i, xDrive35i and xDrive50i applications
BMW X6 M E71/F86 – selected applications

The exact application depends on the engine, production date and vehicle specification, so VIN verification is recommended before ordering.

What Does the BMW Coolant Expansion Tank Do?

The expansion tank allows coolant to accommodate the changes in volume that occur as the engine heats up and cools down. It forms an important part of the pressurised cooling system and helps keep coolant contained within the system.

Because the tank is exposed to repeated heating and cooling cycles, older plastic reservoirs can eventually develop cracks, leaks or damaged mounting points.

Signs of a Failing Coolant Expansion Tank

A damaged BMW coolant reservoir may cause:

Coolant leakage
Low coolant warnings
Visible cracks in the reservoir
Coolant residue around the tank
Broken hose connections or mounting points
Coolant smell around the engine bay
Repeated coolant loss
Engine overheating if coolant loss becomes severe

If you notice coolant loss, the complete cooling system should be inspected to identify the source of the leak.

Buy BMW Coolant Expansion Tank 17138621092 in Nairobi

Looking for a BMW coolant expansion tank 17138621092 in Nairobi, Kenya?

Bavarian Trading Company supplies BMW spare parts and provides BMW servicing and repairs from our garage and parts shop at Adams Arcade, off Ngong Road, Nairobi.

We can assist with BMW cooling-system diagnostics, coolant leak inspection, parts identification and installation.

Order BMW 17138621092 today. Send us your BMW VIN/chassis number before purchasing and we can confirm whether this coolant expansion tank is correct for your vehicle.

Important Fitment Note

BMW coolant expansion tanks can differ between engines and chassis even when the vehicles look similar. Always confirm the part number against your VIN/chassis number before ordering.