A few months ago I had the rear-left door actuator replaced. The power doors would not work because of that failure.
Now the driver's door actuator failed. According to the dealer this is common with the 2007 RDX. Consumer Reports has reported this problem as well.
Luckily, the car is still under warranty, for another 2 years. I hope the replacement actuators are better than the original ones!

 

not common to me, first time im reading about it here and I own an 07.

 

Common for me I have had three replaced under warranty.

 

knock on wood, no problem here.