2012 Cadillac CTS bulb fitment varies by headlight configuration. Check the existing bulb and headlamp assembly before ordering, especially when choosing between HID and halogen applications.
- Low beam: D1S or H11, depending on the vehicle’s lighting setup.
- High beam: H9 or D1S, also configuration-dependent.
- Fog lights: Listed options are H11 LED and H16 LED.
- Front turn signal: 12272NA. Daytime running lights use 5201, while front side markers use 194NA.
- LED-equipped lamps: Reverse, brake, center stop, tail, rear turn signal, and rear side marker applications are listed as LED.
- Other useful sizes: License plate, parking, and dome lights use 2825 or 98; the glove box and general interior use 906.
Because both D1S and halogen bulb options are listed for the headlamps, confirm whether your CTS has the applicable factory lighting configuration before purchasing replacement bulbs.