Chrysler (FCA US, LLC) has found a problem with some 2019-2021 Pacifica Plug-In Hybrid Electric (PHEV) vehicles, as well as some 2017-2018 Pacifica PHEVs that got a software update under a previous recall (NHTSA recall number 22V-077). The issue is with the battery pack, which could cause a fire even when the car is parked and the ignition is off.
Chrysler first learned about this issue in February 2022 through the Vehicle Regulations Committee, which led them to start a voluntary safety recall on certain Pacifica PHEVs, known as recall Z11.
Since then, Chrysler and LG Energy Solution (LGES) have been working to figure out the root cause of the problem. They’ve analyzed field reports, bought back vehicles, looked at vehicle data, conducted thermal tests, and torn down battery packs to get to the bottom of it.
In November 2022, the Technical Safety and Regulatory Compliance (TSRC) team at Chrysler was informed about a battery fire in a Pacifica PHEV that had already been fixed under recall Z11.
From June 2023 to December 2023, TSRC learned about five more fires involving the HV battery in some Pacifica PHEVs that had the Z11 remedy. They tried to buy back these vehicles to analyze if the recall fix was working.
In April 2024, Chrysler received a Pacifica PHEV with a post-Z11 remedy fire in the battery pack. After analyzing the vehicle and battery pack, they sent the battery back to the supplier for further inspection. They found a torn anode tab in one of the cells, but couldn’t identify a second factor causing the fires. This confirmed that the Z11 remedy wasn’t effective.
A folded or torn anode tab can lead to lithium by-product build-up over time. This defect, combined with another unknown factor, can cause an internal short in the battery pack, potentially resulting in a vehicle fire.
Chrysler advises owners not to charge their vehicles and to park them outside and away from structures until repairs are made. Dealers will update the high voltage battery pack control module (BPCM) software, and if necessary, replace the battery pack assembly. The recall numbers are 72B and 73B, and the NHTSA campaign numbers are 24V-356 and 24V-358. Vehicles previously repaired under recall 22V-077 will need to have the new fix applied.
