There is one 2014 Jetta spark plug for each engine cylinder, and this part is responsible for kickstarting combustion in each of the cylinders to power the car. As time wears on and the plug's electrode material wears away, the vehicle can have trouble starting and engine misfires, and could even stall. Keep your trusty vehicle running right with any of the 2014 Volkswagen Jetta spark plugs we carry.