You can filter contents on their term_refernce_fieldterm_reference_field by the field_value of a term_reference_field of the current_user:
So we go:
create a content_view
create a relationship with "favorite_car"
create a relationship with "term from favorite_car"
create contextual filter user:uid with provide devault_value: user_id from logged in user and the relationship favorite_car
Create a content_view
Create a relationship with "favorite_car"
Create a relationship with "term from favorite_car"
Create contextual filter user:uid with provide default_value: user_id from logged in user and the relationship favorite_car
thisThis works for me!