In a statement made on Tuesday, BMW announced the expansion of a previous safety campaign first brought to our attention in August.

Back then, the Munich-based car firm had to call back 480,000 vehicles in Europe and Asia, out of which more than 300,000 were on the Old Continent.

The decision to expand the recall to approximately 1.6 million cars was taken after BMW’s own investigation found more vehicles that have similar technical setups.

Also Read: BMW Not Giving Up On Diesels, Says They Will Be Relevant For Quite Some Time

According to BMW, their investigators found that coolant might leak from the exhaust recirculation unit, and in combination with sparks, the intake manifold could melt. In more extreme cases, this may result in a fire.

South Korean state officials have apparently received reports of 40 fires in BMW cars this year, Bloomberg reports. As a result, the local government asked owners not to drive their vehicles until the investigation ends and a fix is found.

Videos of BMWs being devoured by flames went viral and forced South Korea’s police to raid the automaker’s office in Seoul.

All cars included in this recall are powered by four- and six-cylinder diesel engines and have been produced between August 2010 and August 2017, although “individual production periods vary per model”, as the automaker says.

Owners should expect to hear from the car manufacturer soon, and as always, all repairs will be made free of charge.