Radiator Coolant Filler Neck With Cap – For Lexus RX350 & Toyota Sienna – 16431-31490

If your Lexus RX350 or Toyota Sienna has a cracked or leaky radiator filler neck, this replacement from Uauto1 is an easy fix.

It comes complete with the radiator cap, so you get everything in one shot.

The neck is made from metal and plastic, leak-tested, and measures about 2.72 inches in diameter.

It crosses with OEM numbers 16431-31490 and 16401-62100.

Simple install, and it'll get your cooling system sealed back up.

Comes with a 3-month warranty.

California Prop 65 warning applies, but that's standard.

Keep your engine cool with a solid replacement part.