You can change your Volvo ID username or password from the Volvo Cars app or from the Volvo website.
Note
If you've previously created a Volvo ID linked to a phone number, you won't be able to change that phone number. Instead, you'll have the option to change it to an e-mail address.
The username must be a valid e-mail address to which you have access and must not exceed 60 characters in total. Your Volvo ID is also personal to you, so it's important to not share it or use someone else's contact details as your username.
Go to the Volvo Cars app > 
> Manage account > Manage your Volvo ID or to volvoid.eu.volvocars.com/Account.
> Manage account > Manage your Volvo ID or to volvoid.eu.volvocars.com/Account.Select Change Volvo ID or Change your password and follow the instructions.
Note
When you change your Volvo ID username or password, you will be logged out from the Volvo Cars app. You have to log in using the updated details.