In the modern era buying car parts online is as easy as clicking your fingers. But there are a few things that can make your purchase of a car part seamless.
First of all, every part on your car from the smallest of bolts to the doors & larger parts will have a unique part number, obtaining this part number is key to making sure you receive the correct part in the post. There are a lot of car parts that look identical, howerver inside are very different - so rule number 1 - note down the part unique number.
Then you need to look at part quality, there are some parts on the market that are just not worth bothering with, and they are generally the cheapest parts available. You cannot go wrong with the named brands such as Bosch, Pierburg Siemens etc, but there are also other car parts available that are unbranded but are engineered to either equal or exceed the quality of big name brands. The reason these parts are cheaper is because they have not spent millions in creatng a big brand name, and therefore increasing the cost of parts, a prime example of sites offering these great value & great cost parts online are www.bavariandominator.co.uk & www.worldautosensors.co.uk.
Other things to look at are type of service used to send the parts, and type of payments accepted. Most parts companies these days accept credit/debit cards and paypal.