Earlier this month, I posted the following cabin air filter question: Where is it located in a 2001 Mercury Grand Marquis? Is it a do-it-yourself replacement job?
My Scheduled Maintenance Guide states at 30,000 miles, "Replace cabin air filter, if equipped"
After searching the web for what part number I needed, I found out it doesn't have a cabin air filter. I found the Carquest website which is very helpful,
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lists all the cars that have them and following this listing it areinstallation drawings with instructions. It only goes up to 2002 yearmodels but at least it's a place to start. George