If your car is in need of repairs or if you want to change a part on it or have it serviced then you may consider sourcing the part yourself. Many people are dubious about doing this as they know they have very little mechanical knowledge about how the car works and all fits together so assume they will not be able to locate the correct part. Many websites that offer car parts make it very easy for you to locate the correct one. Euro Car Parts for example, allows you to type in the registration number and it will show you a list of parts that will fit your car based on the make and model. If your car engine has been modified then you may need to check yourself to see if the part is the correct one.
Sometimes buying these parts yourself can save you a small fortune especially if you are able to find a voucher code to allow you some extra money off.