Freightliner FS65 Brake Bulb Size

The Freightliner FS65 brake component requires a 198 bulb size for proper operation and illumination. Data for the specific bulb requirements covers the range from 1996 to 1997.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1996-1997	198 (Cab Over Engine)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	198

Other Locations

Additional Notes

The 198 bulb is the brake bulb size for the Freightliner FS65 (Cab Over Engine) across the 1996-1997 model years.
The 198 bulb follows the ANSI standard, which governs bulb specifications in the United States and Canada, ensuring consistent performance and fitment across compliant applications.
This bulb uses a miniature wedge base, classified under the T5 designation, which refers to a tubular bulb with a 5/8-inch width.
The 198 bulb operates at 12 volts and draws 2 watts, placing it in the low-power range typical of indicator and auxiliary lighting functions.
The wedge base design means the bulb is held in place by tension from the socket rather than a bayonet or screw mechanism, which affects how it is seated and removed during replacement.