Dreams involving cars often symbolize your journey through life, and the presence of family members can indicate your connections and relationships with them. In your dream, being a child suggests a time of vulnerability or a need for support. The flat tire could represent obstacles or setbacks that you are currently facing or fear facing in your waking life.
Your mother getting out to fix the tire and not returning may reflect feelings of abandonment or concern about not having support when you need it. Driving the car to find her signifies taking responsibility or trying to regain control in a challenging situation, but crashing into a house points to the difficulties you may encounter when trying to navigate these challenges alone.
This dream could be highlighting feelings of anxiety regarding independence or the fear of not being able to depend on loved ones. It might be helpful to reflect on your current relationships and any feelings of insecurity or responsibility you're experiencing. Consider reaching out to those close to you for support or discussing any concerns you might have.