General Motors has revealed that its Maven peer-to-peer car-sharing program will get non-GM vehicles from mid-2019.

Maven launched in July and only allows owners and eligible lessees of GM vehicles made in 2015 or newer to make them available on the car-sharing platform. By restricting the program to GM vehicles, the company has been has missing out on a significant amount of business.

In fact, Automotive News reports that about 40 per cent of people who volunteered to be involved with the program own non-GM vehicles.

A Maven spokeswoman says that the model-year requirement will likely remain in force when non-GM vehicles are permitted to join the program.

Maven was initially launched as a trial in Chicago, Detroit, and Ann Arbor, Michigan and is tipped to expand to seven additional cities by the end of the year. Under the current structure, revenue generated by the peer cars is split 60-40 between the vehicle owners and GM.

“We’re poised for growth,” vice president of GM Urban Mobility and Maven, Julia Steyn said during a presentation at the UBS Global Technology Conference in San Francisco.

“We are doubling our revenue every year. We’re going to get to a very significant critical mass in the next couple of years.”

While Maven currently focuses on short-term rental services of passenger vehicles, Steyn says the company is considering other potential services that could include longer-term rentals as well as services for things like lawn mowers, Rvs, and boats.

“We want to bring Maven to a diversified and large marketplace that fits people’s personal needs and professional needs,” Steyn explained.