There are multiple bumpers available for a 1997 Ford Aerostar, depending on whether you need the front or rear, and whether you want one with or without a step. The part numbers are:
- Front bumper without step: E7TZ-17E640-A
- Front bumper with step: E7TZ-17E714-A
- Rear bumper without step: E7TZ-17E714-B
- Rear bumper with step: E7TZ-17E715-A
