Toyota Noah locking system malfunction

Sounds familiar. I own a Toyota Noah as well. I had comparable issues a while back. It's likely related to the car antenna. Have you checked the connections to ensure they are properly seated?

Thanks! Could you tell me more about the 'comparable issues' you had? Were the symptoms the same, and did it seem like the bumper antenna was the problem?

Yes, the symptoms were largely the same. The remote locking was intermittent at first, then completely stopped working. I didn't diagnose it myself, I brought it to a workshop after checking the fuses. The technicians said it was the antenna connection. I advise you do the same.

Thanks! I'll check the antenna connection carefully and see a workshop if needed. I'm estimating about 95€ for the repair. Your experience really helps.