Having a niggling problem with your car can be very frustrating. There are ways to hopefully remedy the problem yourself. The most obvious answer being to take it to the garage. But we all know these days that garage costs are very expensive, especially when they end up finding more problems with your car!
In most cases though this is the best option as you don't want to start messing with your car's safety.Alternatively you could remedy the problem yourself. Every car has it's own expert manual and there are plenty of great books out there to help. If you're confident with all things mechanical then depending on the size of the issue you should be able to fix it no problem.
But if you're starting to spend more than the car's worth on repairs then maybe it's time you bought a new one. There are great deals available these days and plenty of finance options.