They do not need to be adjusted. Their function is to monitor the air pressure in the tire.
I have a 2001 Toyota Sienna and was told at the dealership that it needed changing. They quoted $349.00. Ouch!
The 2008 Toyota Sienna runs on regular unleaded.
The 2009 Toyota Sienna runs on regular unleaded.
The 2011 Toyota Sienna runs on regular unleaded.
The 2001 Toyota Sienna runs on regular unleaded.
The 2002 Toyota Sienna runs on regular unleaded.
The 2010 Toyota Sienna runs on regular unleaded.
The 2005 Toyota Sienna runs on regular unleaded.
The 2003 Toyota Sienna runs on regular unleaded.
The 2006 Toyota Sienna runs on regular unleaded.
The 2004 Toyota Sienna runs on regular unleaded.
The 2013 Toyota Sienna runs on regular unleaded.