2004 Honda Civic Owner's Manual - Page 123

Accessories and Modifications Modifying your vehicle, or installing some non-Honda accessories, can make your vehicle unsafe. Before you make any modifications or add any accessories, be sure to read the following information. Accessories Your dealer has Honda accessories that allow you to personalize your vehicle. These accessories have been designed and approved for your vehicle, and are covered by warranty. Although aftermarket accessories may fit on your vehicle, they may not meet factory specifications, and could adversely affect your vehicle's handling and stability (see ''Modifications'' on page 121 for additional information). Before installing any accessory: Improper accessories or modifications can affect your vehicle's handling, stability, and performance, and cause a crash in which you can be hurt or killed. Follow all instructions in this owner's manual regarding accessories and modifications. When properly installed, cellular phones, alarms, two-way radios, and low-powered audio systems should not interfere with your vehicle's computer controlled systems, such as the SRS and anti-lock brake system. Make sure the accessory does not obscure any lights, or interfere with proper vehicle operation or performance. Be sure electronic accessories do not overload electrical circuits (see page 199 ) or interfere with proper operation. Have the installer contact your Honda dealer for assistance before installing any electronic accessory. 120 Before Driving