In most 2009 Civics, the radio antenna is a small mast mounted on the front passenger-side fender; some trims use a roof-mounted shark-fin antenna, and some markets use an integrated glass antenna in the rear window.
Location can vary by trim, market, and equipment such as satellite radio or navigation, so the exact setup may differ depending on the car.
Common antenna placements on the 2009 Civic
Front passenger-side fender mast antenna
The most common exterior antenna on many Civics is a short vertical mast located on the front passenger-side fender, near the wheel well. It's visible from the side of the car and is easy to replace if damaged.
Roof-mounted shark-fin antenna
Some 2009 Civics, especially higher trim levels or regional variants, use a compact roof-mounted antenna (a "shark fin") positioned toward the center or rear of the roof. This housing often contains the FM/AM antenna and, in some configurations, GPS or satellite radio components.
Rear window glass antenna
A few Civic versions rely on an antenna embedded in the rear window glass, with no external mast. If you inspect the rear window, you might notice a faint fine line or band indicating the internal antenna.
If you still can't locate the antenna, consult the owner’s manual or a Honda dealer to confirm the exact configuration for your vehicle's year and market.
Summary
The 2009 Honda Civic typically places the radio antenna in one of a few ways: a small external mast on the front passenger-side fender, a roof-mounted shark-fin on some trims, or a glass-embedded rear antenna on others. The exact choice depends on trim, market, and optional equipment such as satellite radio or navigation.