Hi Noah, I'm glad to assist you. No, it is incompatible with the 2003 Toyota Matrix XR 4 Cyl 1.8L. It fits the FWD models only. The matching part number for the AWD model is LILIGM65A. Grab our best offer and click the link below to buy it today. Happy shopping! https://www.carparts.com/details/Toyota/Matrix/Liland/Fuel_Tank/2003/XR/4_Cyl_1-dot-8L/LILIGM65A.html?can=cpje1043_CSQA_20241122

Hi Fidel, This item fits the 2003 Toyota Corolla LE FWD. To check the fitment please use our Vehicle Selector — which can be found towards the top of the homepage as well as all categories, search results, and product pages — can help verify if a part will fit your specific application. To enter your application, simply select your vehicle’s year, make, model, sub-model, and engine type and click “Go.” Once your application is selected, you’ll see a “Guaranteed to Fit” badge if the part will fit, and we recommend that you also double-check Your Vehicle Fit Details as well as the Vehicle Fitment Information table on the product page.

Hi Biill, This is a guaranteed to fit for your 2003 Toyota Corolla CE 4 Cyl 1.8L and you might also need the fuel pump if your mechanic recommends it to be replaced as well. For the strap bolts, you can still use the original ones if it is still in very good condition or buy the bolts locally from your trusted auto supply store.