Luxury carmaker BMW will recall 319,045 vehicles in China due to defective PCV valve heaters.

The recall, set to begin on August 30, involves 174,027 domestically-produced cars and 145,018 imported cars, according to a statement on the website of the State Administration for Market Regulation.

Due to defective materials and manufacturing mistakes, internal elements of PCV valve heaters may short-circuit, overheat and melt, increasing risks of fires, it said. The carmaker promised to replace all the defective parts of the affected vehicles free of charge.

The latest recall followed an earlier one in April which saw BMW recall about 360,000 units in China. In the first months, BMW recalled over 830,000 units with six recall statements, surpassing its full year sales volume of 640,000 in 2018, Changjiang Times reported.

The luxury carmaker was also fined 68.78 million yuan in South Korea at the end of 2018 over several engine fires. The Korean authority found the fires to be caused by faulty valves in the vehicles’ exhaust gas recirculation (EGR) coolers. BMW apologized and recalled 172,000 vehicles involving 65 different models in July and October, CNBC reported earlier.