Around 5,020 UK Kia models are affected by a recall from the hybrid and plug-in hybrid Niro range.
Affected models include both the hybrid and plug-in Niro models – the all-electric e-Niro is not affected.
The affected models were built between November 2016 and September 2017.
The fault was identified as part of Kia’s ongoing research and development programme.
Kia says that is not aware of any fires or injuries having occurred as a result of the problem, and the manufacturer is contacting all owners whose cars are subject to the recall.
Chris Lear, director of aftersales at Kia Motor UK, said: “The safety of our customers is our number one priority and we are taking this action to ensure their vehicles are not affected in any way.”
Recalled cars will be inspected at dealerships, with faulty relays replaced free of charge.