What is the time frame for renewing a Thai driver's license before and after expiration?

The original question inquired about the renewal time frame for a Thai driver's license, specifically whether it can be renewed 90 days prior to expiration. Community comments provided clarity on the timeframe, stating that a Thai driver's license can be renewed up to one year after its expiration. Some users also noted that requirements may vary by location, with certain offices not requiring a medical certificate for renewal. Overall, it's advisable to renew the license around expiration but it remains valid for up to a year post-expiry.