This depends on a lot of things, such as what part you’re replacing or what quality you are getting. Sometimes, you can do with aftermarket parts, and sometimes, you don’t have a choice at all due to budget. There are so many types and kinds that all you can do is be cautious and picky where you get your aftermarket parts from. It could be worth it, especially if you are getting quality for a cheaper price compared to OEM parts, as long as it works well with your vehicle and it won’t cause problems later on.