Where do you put engine coolant in a peugeot hdi 307 model 2004?

Locate the coolant reservoir. It is usually a translucent plastic container with a black or blue cap. It is located on the passenger side of the engine bay, near the firewall.

Remove the cap of the coolant reservoir. Be careful, as the coolant may be hot.

Add coolant to the reservoir until the level is between the "MIN" and "MAX" marks.

Replace the cap of the coolant reservoir.

Check the coolant level regularly and add more coolant if necessary.