Numbering systems in auto parts can be elaborated and complex. Usually, car parts come with numbers that are molded or engraved into the part. Often, these parts are slightly modified from year to year making sure that they remain compatible with a particular year and model. In some cases, car accessories are assigned numbers and letters based on their group. For instance, body, electrical, engines and transmissions have their own numbers assigned. The following are some essential tips in identifying car parts.Take Note of the Vehicle Identification NumberCar dealers tend to store important information regarding the vehicle based on this number. For instance, changes in mid-year production have dates assigned to them. Vehicles made before a mid-year change are expected to have different parts requirements compared with those that are produced following the date. Also, transmission type, engine size, key codes, tires and brakes as well as other model details are associated with the vehicle identification number.Being able to identify an auto accessory number will help you when you have to replace a car part. When you have the number, your search for new accessories will be simplified as you do not have to look for all makes, years and models. This is especially helpful when you are trying to search for an uncommon part. You can find part numbers by contacting a dealership or surfing the internet.Check the Accessories for a Certain Part NumberSuch numbers may not be visible as they are hidden on oil or grease. In fact, they can be degraded after some time. It is easy to highlight raised letters using a marker making them legible. Often, the numbers are made small and may not be easy to read. However, production numbers can be found on the part rather than being an actual part number. Such numbers have less value or nothing at all in ordinary parts identification.Let a Professional Store Identify the PartsProfessionals can always identify parts because of their vast knowledge and experience. All you can do is to spend time waiting until the store will give you information that you need. In such extraordinary scenarios, as you become frustrated in your search for an obscure car part or difficult-to-find gasket, you can always rely on aftermarket part companies or authorized parts dealers that make the car. They are expected to have extensive networks and would always share parts information with their distribution warehouses.