Saab 9-7x Back Up Light Bulb Size

The Saab 9-7x back up light requires a bulb size of 921 for proper installation and function within the rear lighting assembly. Data for the specific bulb requirements covers the period from 2005 through 2009.

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
2005-2009	921

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921

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Additional Notes

The Saab 9-7x uses the 921 bulb for the back up light across all listed model years, spanning 2005-2009.
The 921 is a wedge-type bulb, classified under the T15 designation, which refers to its tubular glass envelope measuring 15 eighths of an inch in width.
Wedge bulbs do not use a separate metal base or pins. Instead, the glass envelope itself is pinched at the bottom to form a wedge shape that locks directly into the socket.
The 921 operates at 12 volts and draws 16 watts, which is consistent with standard automotive low-current lighting circuits.
The 921 bulb conforms to ANSI standards as recognized in both the United States and Canada, indicating a standardized specification for physical and electrical properties.
Because the 921 follows a defined ANSI standard, bulbs from different manufacturers carrying the same designation are generally interchangeable, provided they meet the same voltage and wattage ratings.