Very important topic. Mechanical failures is also a crucial factor in road accident. To avoid any accident because of mechanical failure, i think one should always check inflation pressure in all the tires. One should always consider this check at least once in a week, or at least before any long trip. Second thing to make sure is the car brake. If you feel that the brakes are making unusual noise or taking time to react, then always get the brake checked before going for any ride. Lastly, never ignore the warning lights on the dashboard. Warning lights are very helpful to detect any hazard in your car.