It's time for your computer to get a cool down. Left fan is on the left-hand side when facing the screen. Replacing this part will help quiet a noisy fan.
MacBook Pro / MacBookPro8,3 / 2.2 GHz - i7 - ( Early 2011, Unibody, 17-Inch )
MacBook Pro / MacBookPro8,3 / 2.4 GHz - i7 - ( Late 2011, Unibody, 17-Inch )
Product details
661-5044 Fan, Left - Pro, 17inch Macbook Early - Mid 2009 NB-3857W This is a left fan for the 17" MacBook Pro Unibody. Apple's naming convention is based on the perspective of typing on the machine, so please go by this point of view when choosing which side fan you need. EEE code: 5U2