Holy mackerel! Stealership is asking $225 (USD) to just update the software to lower the voltage going to the rear lights. Isn't this criminal?

Is there any alternative to having to take it into the dealership? I'm just flabbergasted to find out that they will sell you brand new tail lights for $350 (or $250 depending on where you go) and charge you $225 to correct their defect in the software.