6 Years Available
Cadillac Ats Light Bulb Sizes
Complete bulb size reference for the Cadillac Ats from 2014 to 2019. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
Every Cadillac ats from 2014 to 2019 uses the same HID-D3S LED low beam bulb — once you confirm your year is within this range, you only need one part number.
Year Range
2014 – 2019
6 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| Low Beam | HID-D3S LED(2014–2019) | 6 years | Consistent |
| High Beam | HID-D3S LED(2014–2019) | 6 years | Consistent |
| Fog Light | LED Fog Light(2014–2019) | 6 years | Consistent |
| Brake Light | LED Bulb(2014–2019) | 6 years | Consistent |
| Side Marker | LED Bulb(2014–2019) | 6 years | Consistent |
| Turn Signal Front | 7444NA LED(2016–2019) 7444NA LED or 7440NA(2014–2015) | 6 years | Changed |
| Turn Signal Rear | LED Bulb(2014–2019) | 6 years | Consistent |
| License Plate | 2825(2014–2019) | 6 years | Consistent |
| Parking Light | 7444NA(2016–2019) 2825 or 7444NA(2014–2015) | 6 years | Changed |
| Reverse Light | 921(2014–2019) | 6 years | Consistent |
| Trunk Light | 175(2014–2019) | 6 years | Consistent |
Common Ats Replacement Parts
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Frequently Asked Questions
We have bulb size data for the Cadillac Ats from 2014 to 2019, covering 6 model years. Select your year below for a complete position-by-position bulb chart.
No, the Cadillac Ats has used the HID-D3S LED low beam bulb consistently across all 6 model years in our database. Any year in the 2014–2019 range uses the same bulb.
The Cadillac Ats uses a HID-D3S LED bulb for the low beam (same bulb serves both high and low beam via dual filament), and a LED Fog Light for the fog lights. Select your year below for the exact fitment chart.
Yes. The Cadillac Ats uses a HID-D3S LED low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.