Cadillac ATS 2013 Bulb Size
Bulb size chart
This 2013 Cadillac ATS bulb size guide helps you quickly verify the correct bulbs by lighting position, so you can replace a failed lamp without guesswork. Whether you are changing an exterior signal light, an interior courtesy bulb, or a headlight, this page is designed to match the bulb to the exact location on the car.
The 2013 Cadillac ATS may use different bulb types depending on trim, lighting package, body style, and market. That is why it is important to check the bulb chart by position before buying parts, especially for headlights, rear lamps, and interior lights where equipment can vary.
For best fitment, compare your vehicle’s current setup with the bulb chart and inspect the installed bulb before ordering. Some 2013 Cadillac ATS models use HID headlights with D3S bulbs, while others with halogen headlights use 9012 bulbs, so the headlamp type must be confirmed first. Rear and front exterior lamps may also differ if your car has factory LED lighting or a specific package. If you are planning an aftermarket LED conversion, make sure the bulb base, polarity, and space inside the housing are compatible, and remember that some upgrades may require resistors or adapters. When in doubt, remove the old bulb and match it directly before purchase.
FAQ
What bulb does the 2013 Cadillac ATS use for HID low and high beam headlights?
Models equipped with HID headlights use D3S bulbs for both the high beam and low beam function.
What bulb does the 2013 Cadillac ATS use for halogen headlights?
Models with halogen headlights use 9012 bulbs for the high beam and low beam function.
Does the 2013 Cadillac ATS use LED bulbs for the brake lights?
Yes. The brake light bulb is listed as LED on this page.
What is the rear turn signal bulb on a 2013 Cadillac ATS?
The rear turn signal light bulb is LED.
What bulb fits the front turn signal and parking light on this car?
The front turn signal light bulb and the parking light bulb both use 7444NA.
What is the reverse light bulb size for the 2013 Cadillac ATS?
The back up reverse light bulb is 921.
What bulb is used for the license plate lights?
The license plate light bulb can be 2825 or 98, depending on the specific setup.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light uses 194 or 7441.
What bulb is used for the interior door light and stepwell light?
Both the interior door light and the stepwell light use 194 or 7441.
What is the front side marker bulb on the 2013 Cadillac ATS?
The front side marker light bulb is 194NA.
Are the rear side marker and daytime running lights LED on this model?
Yes. The rear side marker light bulb is LED, and the daytime running light bulb is also LED.
Can bulb fitment vary on the 2013 Cadillac ATS?
Yes. Trim level, lighting package, body style, and market can change the bulb type, so it is important to verify by position before buying.
Should I check the old bulb before ordering a replacement?
Yes. Checking the installed bulb is the safest way to confirm the correct fit, especially if the car has been modified or has optional lighting equipment.