When rebuilding your 4AGE, we highly advise buying these OEM woodruff keys over no-name branded ones to make sure your harmonic balancer and bearings are sitting flush and don't move independently.  These tend to wear out over time, and if there's enough play in the pulley to crank snout 

• Genuine Toyota OEM Part
• For both 16v and 20v 4-AGE engines 

Part Fitment: