XC70 keyless access failure

I have a similar XC70. The door handle electronics are often the problem. Have you checked the door actuator wiring harness for corrosion or damage? That's usually it.

Thanks. Could you say where the wiring harness is and if I need special tools to check it?

The wiring harness is in the door, connected to the actuator. You can look, but a workshop is better because the electrics can be tricky. I had the same issue; they quoted me 95€ to fix it.

Thanks, I'll take it to a workshop for them to check it out.