| Cover | 12 Months Ended |
| Sep. 30, 2024 | |
| Entity Addresses [Line Items] | |
| Document Type | S-1 |
| Amendment Flag | false |
| Entity Registrant Name | MULLEN AUTOMOTIVE INC. |
| Entity Central Index Key | 0001499961 |
| Entity Tax Identification Number | 86-3289406 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1405 Pioneer Street |
| Entity Address, Address Line Two | Brea |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92821 |
| City Area Code | 714 |
| Local Phone Number | 613-1900 |
| Entity Filer Category | Non-accelerated Filer |
| Entity Small Business | true |
| Entity Emerging Growth Company | false |
| Business Contact [Member] | |
| Entity Addresses [Line Items] | |
| Entity Address, Address Line One | 1405 Pioneer St |
| Entity Address, City or Town | Brea |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92821 |
| City Area Code | 714 |
| Local Phone Number | 613-1900 |
| Contact Personnel Name | David Michery |
