Hello,

here are best college In Mumbai for diploma engineering course:-

1. Veermata Jijabai Technological Institute
2. Agnel Technical college
3. Institute for design of electrical measuring instruments
4. Government institute of Printing technology
5. Premlila Vithaldas Polytechnic
6. Government polytechnic

The above mentioned are government colleges who provides good academic curriculum. You can join any one option you find suitable for you.

Here are the private college options:-

1. KJ Somaiya Polytechnic
2. Shri Bhagubhai Mafatlal polytechnic
3. LS raheja School of architecture
4. Sardar valabh Bhai patel Polytechnic
5. Vivekanand Education society's Polytechnic
6. Vidyalankar Polytechnic

for more college option, please visit the link below:- https://engineering.careers360.com/colleges/list-of-diploma-engineering-colleges-in-mumbai

Hope it helps!