Cadillac CTS 2007 Bulb Size
Bulb size chart
This page helps you verify the bulb sizes for the 2007 Cadillac CTS by lighting position, so you can match the correct replacement to each lamp on the car. Because the CTS could be equipped with different lighting setups, it is important to confirm whether your vehicle uses HID or halogen low beams and to check the exact bulb location before ordering.
For the 2007 Cadillac CTS, the listed bulb chart covers exterior lights such as the headlights, turn signals, brake lights, tail lights, parking lights, reverse lights, and license plate lights, along with interior bulbs like the dome, map, trunk, and courtesy lights. Using the position-specific chart makes it easier to find the right bulb size for the front, rear, and cabin lighting on your CTS.
Fitment can vary by trim, body style, and market, so always compare the bulb in your vehicle with the chart before buying. The 2007 CTS may use halogen or HID low beams, and those setups require different bulbs, so do not assume one headlight type will fit every car. If you are switching to LED bulbs or using aftermarket conversions, check depth, polarity, and heat management, since some replacements may need extra space or resistors to work properly. It is also a good idea to inspect the installed bulb number, connector shape, and lens clearance before purchase, especially for exterior lamps that are sensitive to brightness and beam pattern.
FAQ
What low beam bulb does a 2007 Cadillac CTS use with HID headlights?
The low beam bulb listed for HID-equipped 2007 Cadillac CTS models is D1S.
What low beam bulb does a 2007 Cadillac CTS use with halogen headlights?
The low beam bulb listed for halogen-equipped 2007 Cadillac CTS models is 9006XS.
What high beam bulb fits the 2007 Cadillac CTS?
The high beam bulb listed for the 2007 Cadillac CTS is 9005XS.
What bulb is used for the front outer turn signal on this CTS?
The front outer turn signal bulb listed for the 2007 Cadillac CTS is 2825, 98.
What bulb is used for the front inner turn signal on this CTS?
The front inner turn signal bulb listed for the 2007 Cadillac CTS is 3157.
What bulb fits the rear turn signal on a 2007 Cadillac CTS?
The rear turn signal bulb listed for the 2007 Cadillac CTS is 3157.
What bulb is used for the brake light and tail light?
Both the brake light bulb and tail light bulb are listed as 3157R for the 2007 Cadillac CTS.
What bulb is used for the daytime running light?
The daytime running light bulb listed for the 2007 Cadillac CTS is 3157.
What bulb fits the back up reverse light?
The back up reverse light bulb listed for the 2007 Cadillac CTS is 3157.
What bulb is used for the front side marker light?
The front side marker light bulb listed for the 2007 Cadillac CTS is 194NA.
What bulb is used for the rear side marker light?
The rear side marker light bulb listed for the 2007 Cadillac CTS is 2825, 98.
What bulb fits the license plate light?
The license plate light bulb listed for the 2007 Cadillac CTS is 2825, 98.
What bulb is used for the dome light and map light?
The dome light bulb and map light bulb are both listed as PC175 for the 2007 Cadillac CTS.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light bulb listed for the 2007 Cadillac CTS is 211-2.
Why should I check my installed bulb before ordering?
Because trim and lighting package differences can change the bulb type, checking the installed bulb helps confirm the correct fit before you buy.