This is an authentic OEM Subaru nut designed for the front CV joint. If your nut is stripped or lost, you can buy this one individually as a direct replacement. Supersession numbers are 902170044 and 902170047. It's sold individually. Note that Subaru of America only warrants parts installed on a car with a matching VIN.
To use this Subaru front CV axle nut, first make sure your car is a WRX from 2002 - 2025, an STI from 2004 - 2021, or a BRZ from 2013 - 2025. Remove the old or damaged nut carefully. Then, install the new nut in its place. Tighten it properly but don't over - do it as it might damage the threads. As for maintenance, check the nut periodically for any signs of looseness. If it seems loose, tighten it gently. Remember, Subaru of America will only warranty this part if it's installed on a car with a matching VIN, so keep your vehicle information handy when getting warranty service.
