it might workor it might not work . u will have to check .
with the CECHG03 40 gb model there is 2 version of lazers for it , the 1st lot of CECHG03 that was made had a single lazer len , later on they changed it and had 2 lazers lens 1 for games and bluray movoes and 1 for dvd ,cd .
ok to decide which laser u got u going to have to take you ps3 apart and check your old lazer
if your lazer looks like this ^^^^
its the deul laser as u can see in the pic which is the KES-410A model . so the drive in the ebay link wont work
if you lazer looks like this ^^^^
then u got the single lazer version which is KES-400A which the drive in the ebay link will work