Buy 2006 Scion XB 1500CC 16VALVE DOHC EFI, MANUAL Engine Coolant Reservoir Cap. EXPANSION TANK CAP Container, Damage, Avoid - OEM Scion Part # 1647123030 (16471-23030)

Cap. Reservoir. Radiator RESERV. Tank. Engine Coolant.
A cover that prevents foreign debris from entering the container. Part included in shroud assembly. Included with: Reservoir Tank, Shroud.

Fits COROLLA, ECHO, XA, XB, XD, YARIS

EXPANSION TANK CAP; Corolla. EXPANSION TANK CAP; iQ.
Engine Coolant Expansion Tank - Repair or Replace
A failed expansion tank can cause the cooling system in your 2006 Scion XB to leak antifreeze, or it can cause your engine to overheat. If you're losing coolant, contact our service department to avoid engine damage.