I just got my 5 years license renewed in Chiang Mai. Car and motorbike, both expired more than 2 years. Here is my experience.
Condition:
Entered Thailand with non-imm visa in late July
Applied renewal on 1/Aug
Out of Thailand for 3 years due to COVID
Licenses were expired more than 2 years
Documents:
Residence certificate (I paid an agent to do it through immigration, because I didn't have time. Embassy option was not possible due to the length I stayed here, too short to issue it).
Passport
Photocopy of passport
Medical certificate
expired license
Printout of the QR code of the online course certificate
Procedure:
Took online course even before I arrive in Thailand.
Walk in to the Chiang Mai hang dong branch, arrived at 8.00. There was already a long que.
Entered the building at 8.15, queued again at the information on the second floor. However if you are sure with the document, probably you can skip this process.
Go to counter 27 without any numbers assigned, just directly give the document at the counter
As my license was expired over 1 year, exam at 10.00.
2 exams, one for car, one for motorbike. They register your fingerprint for verification.
Pass the exam. Over 45/50.
Go to counter 27. They gave me the number for other counters to pay.
Number called, fee paid.
Proceed to take pictures, and print the new license, good until 2028. It's renewed license, not new. So the date when I got the license first remains as 2014.
The good thing is that in Chiang Mai you don't need booking and you can process it on the same day. I originally thought of doing it in Bangkok, but online booking was fully booked until September. I also contacted some agents in Pattaya, I didn't mind paying if it can be done quickly. However, they told me they need to book it when I arrive in Thailand, then from that point it could be a few days, or weeks to wait. They also said if it's expired over 2 years, it's complete new license, starting from 2 years temporary license again. I contacted 2 agents in Pattaya they sell these supporting services and both said the same thing.
In the end, coming to chiang mai and doing it by myself was the fastest and also the best result.