China's quality watchdog demanded joint-venture FAW-Volkswagen submit new materials to verify the effectiveness of a latest recall due to defective rear axles.

On October 17, the company announced a recall of more than 581,000 cars, including its New Sagitar and Beetle vehicles, as the trailing arms of the rear axles could rupture in certain scenarios. It offered to place a metal plate in the trailing arm to ensure the proper operation in case of a rupture.

China's General Administration of Quality Supervision, Inspection and Quarantine (AQSIQ) said in a statement on November 1 that its defective product management center has ordered the company to provide further materials for verifying the recall measure's effectiveness.

The AQSIQ also ordered its management center to devote more technological resources to the case and organize assessment of FAW-Volkswagen's recall by inspection bodies and industry experts.

The center asked affected car owners to contact the company's dealers for examination in the case of a trailing arm deformation or a rupture and also to report the problem to the center online, the statement said.