Honda is recalling about 2.1 million Accord cars worldwide, including 1.15 million in the United States, because the battery sensors can potentially short out and cause a fire. The automaker has received 3,972 U.S. warranty claims relating to the issue.
The recall covers vehicles from the 2013-16 model years with 12-volt battery sensors.
The battery sensors may not be sufficiently sealed against moisture intrusion, Honda said. Over time, moisture may introduce road salt or other material into the battery sensor, leading to rust and eventual electrical shorting of the sensor.
Due to the large size of the recall, Honda said dealers would initially adopt a temporary fix by applying an adhesive to prevent moisture intrusion, and then later replace the sensor.
Honda plans to notify affected owners by mail later this month, instructing them to bring in the vehicles to their dealers, which will inspect and replace the faulty sensors.
The company first received a claim of an engine compartment fire from Canada in 2015 and began investigating the issue. In early 2016, it received a claim of a similar fire in China.
A lot of parts will be needed to complete the recall, Honda said, so in cars whose sensors are still in good condition, the dealer will apply adhesive sealant to the sensor case as a temporary fix until Honda gets enough parts in stock.