General Motors has issued a recall for 2017, 2018, and 2019 Chevrolet Bolt EV models due to a fire risk.

The car manufacturer first announced a recall for the EV last year but at the time, it only had a temporary fix available. Fast forward to April 2021 and it now has a permanent fix for the Bolt.

Read More: Chevy Bolt Recalled Over Fire Risk, Owners Being Told To Park Outside And Away From Homes

Following an investigation, experts at General Motors discovered that a “rare manufacturing defect in certain battery modules in vehicles” from the 2017, 2018, and 2019 model years led to the fires of five Chevrolet Bolts. The automaker determined that “a heat source or a short in a cell” could trigger a fire.

In developing a fix for the issue, General Motors has created tools for “dealers to diagnose battery issues as well as advanced onboard diagnostic software that, among other things, has the ability to detect potential issues related to changes in battery module performance before they become potential problems during vehicle operation and charging,” GM spokesman Dan Flores told The Detroit News.

Owners of 2019 Chevrolet Bolt models can bring their cars into their local Chevrolet dealership to have the new diagnostic software installed from this week while owners of 2017 and 2018 model year Bolt EVs will need to wait until late May to be eligible for the remedy. General Motors has confirmed that the new diagnostic software will come standard on the 2022 Bolt EV and EUV, as well as other electric vehicles from the brand.