Volvo C70 Map Light Bulb Size

The Volvo C70 map light requires a bulb size of 74 for the interior lighting component. Data for the specified bulb size covers the range from 1998 through 2004.

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
2001-2004	74
1998	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The Volvo C70 uses the 74 bulb for the map light across the 1998 and 2001-2004 model years.
The 74 is classified as a T5 miniature wedge bulb, a form factor defined by a wedge-shaped base that seats directly into a socket without a separate metal cap or pins.
The 74 bulb operates at 12 volts and draws 1.4 watts, placing it among the lower-wattage bulbs found in automotive interior lighting applications.
The T5 designation refers to the bulb's tubular envelope, with the numeral indicating a width of five-eighths of an inch.
The 74 bulb conforms to ANSI standards as recognized in the United States and Canada, meaning its physical and electrical characteristics follow a defined industry specification rather than a proprietary format.
The wedge base design of the 74 bulb means fitment depends on socket compatibility with that specific base type; sockets designed for pin-base or bayonet-base bulbs are not interchangeable with it.