The MTA is now accepting rider complaints via WhatsApp

The MTA will now take your questions — and complaints — via WhatsApp.

Bus and subway riders who need help navigating New YorkCity’s transit network, or just want to gripe about their late train, can now message the agency directly using the mobile service, the agency said Thursday.

The service — which quietly launched about six weeks ago — already accounts for 10 percent of the MTA’s customer service interactions, or about 4,000 total users, MTA chief customer officer Sarah Meyer said.

“It’s less people complaining and more people trying to understand the complex system,” Meyer told The Post.

“Many of our customers aren’t on Twitter and aren’t necessarily using Facebook to find out travel information.”

To use the 24/7 service, riders who already have WhatsApp installed on their phones just have to go to the new.mta.info/whatsapp, which opens a direct messaging thread with MTA New York City Transit.

MTA employees are able to respond to WhatsApp questions in any language, Meyer said.

“It’s more schedule questions. There’s a lot of questions around bus arrival time,” Meyer said.

“We know that this is a 24/7 city, and we want to make sure we’re getting everywhere to where they need to be using using our system.”