Do I need to maintain/renew my LEI?

YES!

Each SD, MSP, SEF, DCM, DCO, and Swap Data Repository shall maintain and renew its legal identity identifier in accordance with the standards set by the Global Legal Entity Identifier System. 

45.6(d)(2)

The importance of regular LEI renewal

The legal entity is required to notify the managing LEI issuing organization of changes to its legal entity reference data. The annual renewal process ensures that the legal entity and the LEI issuing organization review and re-validate the legal entity reference data at least once per year. This ensures high data quality with regard to the global LEI population and, consequently, trust in the Global LEI System.