There is a gap between the rear part of the bonnet and the rubber seal for waterproofing, and water directed onto the gap with high pressure during washing etc. can reach the alternator or the engine surface, and penetrate into the revolution sensor connector inside the alternator or the terminal of the engine ignition plug. This can cause the engine warning light to illuminate and the vehicle to run on the electricity for fail safe operation, or it can cause the ignition plug to fail to ignite thus the engine will not function properly exceeding the exhaust emissions standards.