Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Instructions for Removing the Expansion Tank

Model: BMW Serie 3 E46 - Years 1998-2006
Part: Antifreeze coolant

To perform this maintenance, ensure the engine is cold since you need to drain the coolant: first, remove the splash shield from under the hood, unscrew the drain screws of the cooling system (these are the blue plastic ones under the radiator) and let the coolant flow out; disconnect the hoses from the expansion tank by removing the retaining clips; re-screw the drain screws, remove the retaining clip of the tank at the radiator located at the bottom, and pull it out of its seat by lifting it up (removing the fan makes this easier).

Updated on 13 February 2026 by ScegliAuto

Video tutorial

Related tutorials

How to Replace the Expansion Tank on a BMW 3 Series?
How to Replace the Expansion Tank on a BMW 3 Series?
BMW Serie 3 (1998-2006 / E46) To replace the coolant expansion tank on this vehicle, follow these instructions. After opening the hood and lifting the car, locate the tank positio…
Instructions for Draining Coolant
Instructions for Draining Coolant
BMW Serie 3 (1998-2006 / E46) Among the maintenance tasks that are often neglected is the replacement of coolant: it is common to top off with regular tap water, which over time t…
How to Replace the Coolant Temperature Sensor in a BMW 3 Series?
How to Replace the Coolant Temperature Sensor in a BMW 3 Series?
BMW Serie 3 (2005-2013 / E91, E90, E92) In this tutorial, you will see how to replace the coolant temperature sensor in a BMW 3 Series, a very simple operation. First, to work safely, wait …

Other guides you may be interested in

How to Replace the Remote Battery for the Volvo XC40?

In this tutorial, you will see how to replace the battery in the remote for the Volvo XC40, a very simple and quick operation. For this, you will need a replacement battery of type CR2032 and possibly a small flathead screwdriver. First, remove the front cover by pressing the button on the metal ring, then locate the second button, press it as well, and remove the opposite cover. Next, open the circular cap, take out the old battery, and insert the new one in the opposite direction. Finally, reassemble everything.

Watch the video!


by ScegliAuto

More videos