BMW recently announced that it is recalling 1.6 million diesel vehicles worldwide because of potential fluid leaks that could cause fires.

The automaker said that in some diesel vehicles, the coolant glycol could leak out of the exhaust gas recirculation (EGR) cooler, which is part of the emissions reduction system. When combined with typical deposits of soot at the high temperatures that occur in the EGR module, the leaks could result in smoldering particles that could cause the intake manifold to melt “in very rare cases,” the BMW Group said in a statement. This could cause a fire “in extremely rare cases,” the company said.

The company previously recalled 480,000 vehicles in Asia and Europe in mid-August after fires were reported in South Korea. In August, the South Korean government banned owners of affected vehicles from driving them until they could be inspected after videos of BMW vehicles on fire went viral in the country. The company also faced a class-action lawsuit from customers that alleged that BMW did not respond promptly to the fires, which led to an investigation by the government. Police raided the automaker’s office in Seoul. In response, BMW said it would pick up the cars banned from being driven, provide rental cars to customers and conduct the necessary inspections. No injuries were reported related to the incidents.

Following the driving ban in South Korea, the BMW Group conducted further examinations of vehicles with engines with similar setups. The company then announced the ban for Asia and Europe. On October 23, BMW said it would expand its recall to cover a total of 1.6 million vehicles worldwide, including around 54,700 vehicles in the U.S and Canada. The announcement includes some vehicles made between August 2010 and August 2017. As part of the technical campaign, the company said it would check the EGR modules and replace any faulty components in all potentially affected vehicles.

The global recall is voluntary. The BMW Group said that it did not find any significant risks to customers in its recent examinations.

“Nonetheless the BMW Group decided to further reduce even this minor risk by expanding the country-specific technical campaigns. It is the goal of BMW Group to support the trust and confidence of our customers in our products,” the BMW Group said.

BMW said that it would contact customers with affected cars. Customers can also check for recalls that apply to their vehicle by entering the last seven numbers of their vehicle identification number (VIN) on the BMW website. Additionally, customers can contact BMW or their local dealer with questions and concerns.

BMW also recently recalled approximately 2,600 2016-17 BMW M3 sedans, 2016-17 M4 and M4 GTS coupes and 2017 M4 convertibles because of a potentially faulty connection between the flange and driveshaft. A failed connection could result in a loss of propulsion and increased crash risk. BMW will notify owners, and dealers will replace the driveshaft at no cost to the customer.