Dorman - OE Solutions Washer Fluid Reservoir P/N:603-478
Keep a steady supply of washer fluid on board with the Dorman washer fluid reservoir 603-403, a direct-fit replacement for the 2003-2008 Toyota Corolla and 2003-2008 Toyota Matrix. This front windshield washer fluid reservoir from Dorman - OE Solutions is engineered to withstand the stresses of underhood heat and engine vibration on the listed applications.
A washer reservoir sits in the engine bay, where constant heat cycles and vibration can take a toll over time. Signs that the reservoir may need replacing include a visible crack in the tank, washer fluid puddling beneath the front of the vehicle, or a tank that runs empty much sooner than expected. Since leaks can also come from the pump, hoses or fittings, inspect the whole washer system before replacing parts. If a cracked or failed tank is the cause, this Dorman washer reservoir replaces it.
See the Buyer's Guide tab for complete application details.
Interchange: APWSR003 · TO1288112 · TO1288145 · TO1288159 · 8531502110 · 8531502111 · 8531633120 · 85316AA020 · 8533220750 · 8533222031
This part cross-references / interchanges with the following part numbers:
What does the 603-403 reservoir do?
It stores washer fluid at the front of the vehicle so the washer system can draw from it when you spray the glass. It is engineered to withstand underhood heat and engine vibration.
Is this the right Toyota Corolla washer fluid reservoir for my car?
It is listed as a direct-fit replacement for the 2003-2008 Toyota Corolla and 2003-2008 Toyota Matrix. The Buyer's Guide tab shows the full application details.
What are signs a washer fluid reservoir may need replacing?
Common signs include a cracked tank, washer fluid puddling under the front of the vehicle, or a reservoir that empties faster than normal. Check the pump and lines too, since leaks can come from other parts.
Is it built to handle engine bay conditions?
Yes. Dorman engineers this reservoir to withstand the stresses of underhood heat and engine vibration, and makes it from quality materials for reliable performance.
How is this reservoir installed?
It installs in place of the original reservoir as a direct replacement. Follow the vehicle service information for removal, reconnecting lines, and transferring any components as the procedure directs.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.