On my new-to-me 2005 4runner, I was surprised to find that I have a lumbar support adjust switch on the driver seat. But it's not a power seat - everything else is manually adjusted.

But the switch isn't working. The dealer wants $189 just to diagnose the issue. Another shop wants $120 for the diagnosis.

I just wanted to get an idea of the overall cost if I want to fix it, whatever "it" is - I'm guessing it needs a new lumbar motor in the worse case.

Does anyone have any similar service done on the seat and can give me some ideas of what I might be looking at.

(More than likely I'll just get some simple lumbar cushion and call it a day, but power lumbar support is nice to have).