Radiator Cap Replace 16401 31650 1640131650 Compatible with Toyota 2003 2010 4Runner 2007 2010 FJ Cruiser 2005 2009 Tacoma 2003 2009 GX470 2006 2012 IS250 IS350 2007 2011 GS350 GS450h

The radiator cap holds the coolant inside the radiator, but it also works as a two-way valve that keeps the right pressure inside so the radiator does it work correctly. It is extremely important to always make sure to allow the engine to cool down before removing the radiator cap, as removing the cap from a hot system can cause sudden coolant spray and severe burns. A faulty radiator cap can have a huge impact on the cooling performance of your vehicle, once you have a replacement and your engine is cool, simply unscrew the old cap, and install the new by screwing it on. Compatible with the Following Vehicles: 2003-2009 Toyota 4Runner 4.0L V6 ( To 01/2009 ) 2010 Toyota 4Runner 2.7L L4 2007-2010 Toyota FJ Cruiser 2005-2009 Toyota Tacoma ( To 01/2009 ) 2006 GS300 2007-2011 GS350 2007-2011 GS450h 2010-2011 GX460 2003-2009 GX470 ( To 01/2009 ) 2006-2012 IS250 ( To 09/2011 ) 2006-2012 IS350 ( To 09/2011 ) Replaces Part #: 16401-31650, 1640131650. NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts. NOTE: To ensure accurate fitment, please confirm your vehicle information in the above compatibility section and the description.