Hi Daniel, As per careful checking, this is a guaranteed fit for your 2000 Mercury Grand Marquis LS/GS 8 Cyl 4.6L. You can re-do the fitment check by following the steps below. On the homepage, please enter your application, simply select your vehicle’s year, make, model, sub-model, and engine size and click “Go.” Once your application is selected, type the name of the part you need on search box on the top portion(e.g. Fender) and press enter. Once the part shows up on your screen, you’ll see a “Guaranteed to Fit, Direct fit” note/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.

I bought a fender from carparts.com, it fit on my 2001 Grand Marquis.

Hi Jullian, I'm pleased to assist you. Is your vehicle a 1995-2002 Mercury Grand Marquis GS or LS? If it is, then these fenders are compatible. you can go ahead and use the link below to directly place your order. Take advantage of our low price and limited stocks. I hope this helps, and enjoy shopping! https://www.carparts.com/fender/replacement/set-7610-1?can=CPGG4850_CSQA_20231208