The peace that has reigned over South Korea's historically volatile car industry in recent years is about to be shattered with the decision by union workers at both Hyundai and Kia to strike over pay and working conditions. It will be the first strike for some four years at Hyundai; 80% of the 44,000 Metal Workers' Union members at Hyundai voted for strike action. Kia hasn't had a strike for two years.