You should receive an application to renew your driver's licence about 4-6 weeks before it expires.
If you don't receive a renewal notice, or if it's been lost or destroyed, phone 13 10 84 or go to a Customer Service Centre.
The way you renew your licence changes depending on whether you need a photo or not, and on the type of licence you are renewing.
Visit the SA.GOV.AU website for details about renewing your driver's licence.