In March, VW recalled 384,000 vehicles in China to fix gearboxes following criticism by state television.
Foreign makers of autos, processed food and other products often are regarded in China as more reliable than local brands but any quality problems are widely publicized by state media.
Chinese consumers are on edge following a series of safety scandals over fake or tainted food, milk powder, medicines and other goods.
China is Volkswagen's biggest market and strong sales have helped to buoy the German company's finances against weaker performance elsewhere.
Volkswagen sold 2.8 million vehicles in China last year for a 14 percent share of the market, according to LMC Automotive, a research firm.