What year is your car. 97-2000 had different style remotes. 01-03 had different remotes then the 97-2000, so I think it does matter. I ordered mine off ebay with the year specific of my car and has been working good for 6 months so far.
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Exterior- stock painted black wheels, clear corners, stainless steel grill, cross and drilled front and rear rotors with evolution brake pads.
Coming soon- 18 inch black mustang bullet rims, GT/GTP rear bumper, tinted windows.