REPLACEMENT RADIATOR CAP : 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. If the pressure isn't maintained, the coolant can boil and evaporate, putting the engine at risk of overheating. Symptoms of a Bad Radiator Cap: air enters the system, low coolant level, coolant leaks, overflowing reservoir, overheating engine.
REPLACES PART # : 16401-31650, 1640131650 radiator cap. The radiator cap compatible with Lexus : 2006 GS300 | 2007-2011 GS350 | 2007 GS430 | 2007-2011 GS450h | 2010-2011 GX460 | 2003-2009 GX470 | 2006-2012 IS250 | 2006-2012 IS350. Once you have a replacement and your engine is cool, simply unscrew the old cap, and install the new by screwing it on.
OE FIT, FORM, FUNCTION : Professional, high quality OE style and meet or exceed all original equipment performance replacement radiator cap. Constructed with premium materials for durability. Designed to function on open cooling systems and overflow reservoir type systems and allows the cap to be installed and removed much easier.
FRIENDLY NOTE : If the Radiator Cap fails on your vehicle, simply contact us for a replacement. Also if you have any other questions on our this radiator cap, please contact us at the first time. This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts.