If you experience the following symptoms with your PS3:
disc read errors
slow loading times
failure to read disc
screen freezes when playing a game or watching a blu-ray movie
Then, this should fix your problem.

Fitment:
The sure way is to open up the blu-ray drive and match the model # KEM-450DAA KES-450DAA.
You can look it up in the back of your PS3 console for the correct model#.

PS3 slim console with dual lens and it will fit the following models :
160GB Slim Console
CECH-2501A
CECH-2502A
CECH-2503A
CECH-2504A
CECH-2505A
CECH-2506A
CECH-2507A
CECH-2508A
CECH-2511A
CECH-2512A
CECH-2500A .. CECH-25xxA

Package Content:
1 replacement KEM-450DAA Blu-ray Drive for Sony Playstation 3 Slim