Yes, MIOSA is free for consumers. The Motor Industry Ombudsman of South Africa does not charge you to lodge or investigate a complaint. It is funded by the motor industry under the Automotive Industry Code of Conduct.
You may still have costs of your own, such as an independent inspection report or diagnostic test to prove the defect. These reports often make the difference in a complaint, so they are usually worth getting.
Using an attorney is optional. Many consumers lodge complaints themselves. Legal help is useful when the amount is significant, the business has already rejected the complaint, or the matter may need to go further, to the National Consumer Commission or to court.
Need help with this? See Consumer Protection & MIOSA.
This answer is general information about South African law and does not create an attorney and client relationship. Please speak to the firm about your specific matter.