There are a few risks associated with using aftermarket parts on your vehicle. One of the biggest risks is that the part may not fit properly, which can cause problems with installation or lead to other issues down the road. Additionally, aftermarket parts may not be made to the same quality standards as OEM parts, which could result in premature wear or failure. Finally, warranty coverage may be voided if you use aftermarket parts on your vehicle, so it's important to weigh all of these factors before making a decision.