Coolant Expansion Tank

The coolant expansion tank, also known as the coolant reservoir, accommodates the expansion of coolant as the engine warms up. It is an important part of the engine cooling system and allows you to check the coolant level. When choosing a replacement expansion tank, make sure it matches your vehicle’s specifications.

Which coolant expansion tank fits your car?

The correct expansion tank depends on your vehicle’s make, model, year and engine variant. Compare the OE reference number, shape, dimensions, mounting points and hose connections. Check whether your vehicle requires a coolant level sensor and whether it is included. The cap may also be sold separately, so check whether you need to order one and ensure it matches the specified pressure rating.

When should you replace a coolant expansion tank?

Cracks, leaks or damaged connections can make it necessary to replace the expansion tank. Age and repeated temperature changes can cause the plastic to become brittle. If the coolant level keeps dropping, have the cooling system checked, as coolant loss can also have other causes. Only check the level when the engine is cold, and never open the reservoir while the system is hot.

Browse the coolant expansion tanks in this category and compare the product specifications to find the right reservoir for your car.