Check antifreeze
Required test tool:
A hydrometer, which is inexpensive from the accessory trade and is often available for use at petrol stations.
Check the antifreeze concentration of the coolant regularly before winter begins, especially if pure water has been added in between.
The engine must not be warm. The tester shows the nominal coolant temperature (usually +21 °C, i.e. room temperature).
Open cap on expansion tank.

Draw coolant into the hydrometer and read the coolant density on the float. The antifreeze should provide protection down to -35 °C in our climate.
The mixing ratio of coolant concentrate to water is then 1:1.
Example: the antifreeze measurement with the hydrometer on the 1.6 L engine shows protection down to -10 °C. In this case, drain 2.6 l of coolant and refill with 2.6 l of pure antifreeze concentrate. Note: only top up with Fiat-approved antifreeze "Paraflu". The related type "Paraflu Formula Europa" may be used for topping up. However, if this type is added while conventional "Paraflu" is still in the cooling circuit, the measurement with the antifreeze hydrometer becomes inaccurate.
Close the filler cap on the expansion tank and check the antifreeze again after a test drive.
Test yourself
A quick Fiat Bravo quiz: every answer comes with an explanation and a link to the manual page.