MTA’s Access-A-Ride service left elderly and disabled passengers stranded more than 31,000 times last year, according to an audit by Comptroller Scott Stringer.

The MTA didn’t heavily monitor the service and allowed contracted bus operators to “act with impunity,” creating an unreliable service that the city’s most vulnerable residence couldn’t rely on, according to Stringer.

“Access-A-Ride is absolutely essential for thousands of people to get around New York City every single day, yet this program stranded thousands of people, wasted millions of taxpayer dollars and caused untold harm and distress,” Stringer said.

“We found serious breakdowns in oversight and operations which have contributed to a culture of indifference and neglect by the MTA. After years of mismanagement, it’s on the MTA to take action now.”

The MTA responded that it is working to improve the service and developing a vehicle-location system.

The MTA spent $321 million dollars on the service, which takes qualified passengers anywhere in the city for the price of a MetroCard, in 2015.