Cadillac ATS 2017 Bulb Size
Bulb size chart
This page covers bulb sizes for the 2017 Cadillac ATS and is organized by lighting position so you can quickly verify the correct replacement bulb before you buy. Whether you are replacing an exterior lamp or a small interior bulb, the goal is to match the bulb type to the exact location on the car.
The 2017 Cadillac ATS may use different lighting setups depending on trim, body style, and market, so the bulb chart is meant to help you narrow down fitment by function. Use the listed bulb sizes for the specific light position on your vehicle, especially when comparing front lighting, rear lighting, and interior courtesy bulbs.
Fitment can vary on the 2017 Cadillac ATS, especially when comparing trim levels, lighting packages, and halogen versus HID-equipped models. For example, the headlight bulb size is different for halogen headlights and HID headlights, and some exterior lamps may be LED assemblies rather than simple replaceable bulbs. If you are considering an aftermarket conversion, make sure the bulb type, connector, and housing design are compatible before ordering. The safest approach is to check the bulb currently installed in your ATS and compare it with the bulb chart here before purchase, since a prior owner may have changed parts or the car may have a market-specific setup.
FAQ
What bulb size does the 2017 Cadillac ATS use for the low beam and high beam headlights with HID headlights?
For 2017 Cadillac ATS models with HID headlights, the listed headlight bulb size for both high beam and low beam is D3S.
What bulb size does the 2017 Cadillac ATS use for the low beam and high beam headlights with halogen headlights?
For 2017 Cadillac ATS models with halogen headlights, the listed headlight bulb size for both high beam and low beam is 9012.
Are the brake lights on the 2017 Cadillac ATS replaceable bulbs?
The brake light bulb is listed as LED, which usually means the light is part of an LED assembly rather than a standard replaceable bulb.
What is the rear turn signal bulb size on the 2017 Cadillac ATS?
The rear turn signal light bulb is listed as LED, so it is typically not a conventional replaceable bulb size.
What bulb size is used for the reverse lights on the 2017 Cadillac ATS?
The back up reverse light bulb size is 921.
What bulb size is used for the front turn signal and parking lights on the 2017 Cadillac ATS?
Both the front turn signal light and the parking light use 7444NA.
What bulb size is used for the front side marker light on the 2017 Cadillac ATS?
The front side marker light bulb is 194NA.
What bulb size is used for the rear side marker light on the 2017 Cadillac ATS?
The rear side marker light bulb is listed as LED, so it is generally part of an LED lighting assembly.
What bulb size is used for the license plate lights on the 2017 Cadillac ATS?
The license plate light bulb sizes listed are 2825 and 98.
What bulb size is used for the trunk or cargo area light on the 2017 Cadillac ATS?
The trunk or cargo area light bulb sizes listed are 194 and 7441.
What bulb size is used for the interior door lights on the 2017 Cadillac ATS?
The interior door light bulb sizes listed are 194 and 7441.
What bulb size is used for the stepwell lights on the 2017 Cadillac ATS?
The stepwell light bulb sizes listed are 194 and 7441.
What bulb size is used for the vanity mirror light on the 2017 Cadillac ATS?
The vanity mirror light bulb size listed is 7065.
Do all 2017 Cadillac ATS models use the same bulbs?
Not always. Trim, lighting package, body style, and market can affect fitment, so it is important to verify the bulb position and equipment on your specific ATS.
Why should I check the installed bulb before buying a replacement for my 2017 Cadillac ATS?
Checking the installed bulb helps confirm the exact fitment, especially if the vehicle has been modified, repaired, or equipped with a different lighting package than expected.