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      02-14-2013, 12:20 AM   #11
Private First Class

Drives: 2008 335i Sedan
Join Date: Oct 2011
Location: Calgary, AB

iTrader: (0)

Originally Posted by Volasko View Post
Check to see if the T-stat is plastic or aluminum. It is common to swap the t-stat when you do the pump and the updated design is plastic vs the originals aluminum. If you have an 06 and your t-stat is plastic someone must have swapped it already. See this thread for more detail:

the 9th pic is the t-stat shown in the original aluminum material. The 20th pic shows the updated plastic design.
BMW Canada tells dealers not to replace the t-stat and pump together (unlike BMW USA). The t-stat is replaced only if it has failed too - usually if the car repetitively overheats and the t-stat melts its electronics. You could coneivably have an old t-stat and a new pump, if the pump alone failed while the car was in warranty, or in CPO warranty.