German automaker BMW will call back 156,922 of its vehicles in China after child seats defects were found, China's top quality watch dog announced.

The recall, which will begin on September, will affect more than 134,000 BMW X3 models manufactured between November 2010 and April 2016 and more than 22,000 BMW X4 models produced from March 2014 and April 2016, the General Administration of Quality Supervision, Inspection, and Quarantine said.

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The administration discovered that the child seats installed on the affected BMW models had welding problems in the lower anchors and could prevent the seat from being properly secured, thus raising the possibility of passenger injuries in case of accidents.

BMW China Automotive Trading Co. Ltd. will fix the defected anchors free of charge, according to the statement from the administration.

Meanwhile, BMW also recently announced its plan to unveil its self-driving vehicle models by 2021 in China, Maximilian Doemling, the automaker's senior manager, said during a summit on artificial intelligence and robotics in Shenzhen.

"If you're expecting autonomous function where you can be on the highway, press the button and the car does everything for you, like lane changing and driving, and you can play with smartphone, and you're always safe, we had this big announcement with Intel and Mobileye that we will have the iNext in 2021," he said.

Aside from teaming up with Intel and Mobileye, BMW is also a part of a German makers consortium that bought Here Maps, giving the company another resource to build its driverless system for its iNext series.

TagsBMW, Recall, BMW X3, BMW X4, iNext series