My wife took her Lexus 1999 rx300 to Lexus Dealer. Doors would not lock with remote she was told 3 actuators were bad including the one I changed the day before. They want $500 per door she finally agreed to let me finish the work, found the actuators for about $16 ea do I have to disconnect the battery when changing and if after changing I find it to be the cargo door lock actuator will it affect the cars computer in any way. The reason I ask is the locking problem started when her cargo door would not open by hand Lexus Dealer said cargo door had no issue t I really don't trust dealer.

I would disconnect the battery just in case.