Cadillac CTS 2012 Bulb Size
Bulb size chart
The 2012 Cadillac CTS uses different bulb types depending on the lighting position, trim, and whether the car has factory HID or halogen equipment. This page is designed to help you verify the correct bulb size by location, so you can match the right part before ordering replacements for exterior and interior lights.
Use the bulb chart for the 2012 Cadillac CTS to check common fitment points such as headlights, fog lights, brake lights, tail lights, reverse lights, license plate lights, and cabin bulbs. Because Cadillac offered more than one lighting setup on this model year, confirming the exact position is the safest way to avoid buying the wrong bulb.
Fitment can vary by trim, package, market, and body style, so always compare the bulb listed for your specific CTS with what is installed on the car. Some positions may use halogen bulbs, while others may use LED units or factory HID components, and aftermarket LED conversions can change the required bulb type or connector style. If you are replacing a bulb, it is a good idea to remove the old one and check the marking on the base before purchasing, especially for headlight and fog light applications where the 2012 Cadillac CTS may have different configurations.
FAQ
What bulb size does the 2012 Cadillac CTS use for the low beam headlight?
The 2012 Cadillac CTS low beam headlight is listed as H11 on this page. Some vehicles may also have a D1S setup for combined high beam and low beam HID-style lighting, so check your exact headlight system before buying.
What is the high beam bulb size on a 2012 Cadillac CTS?
The high beam headlight bulb is listed as H9 for the 2012 Cadillac CTS. If your car is equipped with a D1S headlight system, verify the installed lamp type first because the lighting package can change the bulb arrangement.
What bulb fits the front fog lights?
Front fog light fitment is listed as H11 LED or H16 LED for the 2012 Cadillac CTS. Because both options appear on the chart, you should confirm which bulb is installed in your vehicle before ordering.
What bulb does the rear turn signal use?
The rear turn signal light bulb is listed as LED for the 2012 Cadillac CTS. Since the chart does not provide a separate part number, it is best to match the original bulb style or inspect the existing lamp assembly.
What bulb size is used for the brake lights and tail lights?
Both the brake light bulb and tail light bulb are listed as LED on this page for the 2012 Cadillac CTS. That means the exact replacement may depend on the factory lamp assembly rather than a simple universal bulb number.
What is the reverse light bulb for the 2012 Cadillac CTS?
The back up reverse light bulb is listed as LED. Always confirm the lamp type on your specific CTS, since LED rear lighting can vary by trim and market.
What bulb fits the license plate lights?
The license plate light bulb is listed as 2825 or 98 for the 2012 Cadillac CTS. Either of those bulb sizes may apply depending on the exact housing and production setup.
What bulb is used for the parking lights?
The parking light bulb is listed as 2825 or 98. This is the same bulb size shown for the license plate lights on the 2012 Cadillac CTS, so check the socket and original bulb before replacement.
What bulb size does the front side marker light use?
The front side marker light bulb is listed as 194NA for the 2012 Cadillac CTS. Using the exact side marker bulb type helps keep the light output and fitment correct.
What bulb fits the rear side marker light?
The rear side marker light bulb is listed as LED. Because the chart does not show a separate part number, the safest approach is to verify the original bulb or assembly style on your CTS.
What interior bulbs are listed for this model year?
Interior bulb positions on the 2012 Cadillac CTS include dome light bulb 2825 or 98, glove box light bulb 906, interior door light bulb 906, stepwell light bulb 2886X, vanity mirror light bulb 6612F, trunk or cargo area light 211-2, and map light bulb PC175.
What bulb does the daytime running light use?
The daytime running light bulb is listed as 5201 for the 2012 Cadillac CTS. As with other exterior lights, confirm the installed bulb before ordering if your car has been modified or uses a different package.
How can I make sure I buy the right bulb for my 2012 Cadillac CTS?
Start by matching the bulb to the exact lighting position on the car, then compare the chart with the bulb currently installed. This is especially important on the 2012 Cadillac CTS because trim level, lighting package, halogen versus LED equipment, and market differences can affect fitment.