It is good to have an inspect your car by an automotive expert in certain intervals. If you need to change the parts you need to go with the best one. You mentioned in your post about the important parts of your car. You can purchase all kinds of auto parts from
http://www.buyautoparts.com/ like alternator, steering box etc., in affordable rate. They are offering discounts too. Ribbon cable is a cable which makes lot of connections without mess of wires. If you have problem with it, you better to replace it.