Radio Frequency Interference Suppression Equipment
WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Radio Frequency Interference Suppression Equipment
Courtesy of MAZDA MOTORS CORP.
The radio ignition interference capacitor reduces interference transmitted through the radio speakers by the engine ignition and electrical system.