Are they?
From the story, it looks like they're not even afraid, even with so many proofs (videos), and third party involves. Seems they're very confident they will win, they even charges TS even under warranty, and now they even void his warranty.

Fighting against Toyota? In Malaysia? Think again.

In oversea, I've read many cases the parts/car would be replaced if the issue cannot be resolved. They have strong consumer power, that's why the quality control must be good. There's a case on a product (can't remember which) which they did not put some warning, but it is common sense not to do it, but a naugthy customer purposely do it and fight it court and he win. From then onwards, all the product comes with the warning message.