
Nokya Arctic White 9005XS Car Headlight Bulb
$13.00
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Used for: Headlight Bulb High Beam
Used for: Headlight Bulb Low Beam(with halogen headlights)
Used for: Headlight Bulb Low Beam(with HID headlights)
Used for: Back Up Reverse Light Bulb, Daytime Running Light Bulb, Turn Signal Light Bulb Front Inner, Turn Signal Light Bulb Rear
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Center High Mount Stop Light Bulb, Dome Light Bulb, Map Light Bulb
Used for: License Plate Light Bulb, Parking Light Bulb, Side Marker Light Bulb Rear, Turn Signal Light Bulb Front Outer
Used for: License Plate Light Bulb, Parking Light Bulb, Side Marker Light Bulb Rear, Turn Signal Light Bulb Front Outer
Used for: Side Marker Light Bulb Front
Used for: Courtesy Light Bulb
Used for: Trunk or Cargo Area Light
This 2003 Cadillac CTS bulb size guide helps you verify the correct bulb by lighting position, so you can replace a failed lamp with the right fit the first time. Whether you are working on the headlights, tail lamps, interior lights, or small exterior markers, this page organizes the bulb chart by location for easier lookup.
The 2003 Cadillac CTS used different bulb types depending on the light position, and some setups can vary by trim, market, or lighting package. Use this page to match the bulb to the exact spot on the car, such as low beam, high beam, brake light, parking light, or dome light, before you buy replacements.
Fitment can vary on the 2003 Cadillac CTS, especially between halogen and HID headlight setups and between different trim or package combinations. If your car has halogen low beams, the listed bulb is 9006XS, while HID-equipped cars use D1S for low beam; the high beam uses 9005XS. LED upgrades and aftermarket conversion kits may fit physically but still need to match the housing, connector, and beam pattern, so it is smart to compare the installed bulb before ordering. For the best result, remove the old bulb and confirm the number printed on it, since that is the most reliable way to avoid a mismatch.
The low beam bulb depends on the headlight system. A 2003 Cadillac CTS with HID headlights uses D1S low beam bulbs, while a CTS with halogen headlights uses 9006XS low beam bulbs.
The high beam bulb is 9005XS on the 2003 Cadillac CTS.
The brake light bulb listed for the 2003 Cadillac CTS is 3157R.
Yes, the bulb chart lists 3157R for both the tail light and brake light positions on this model year.
The daytime running light bulb for the 2003 Cadillac CTS is 3157.
The rear turn signal light bulb is 3157 on the 2003 Cadillac CTS.
The front outer turn signal light bulb is 2825, 98.
The front inner turn signal light bulb is 3157.
The front side marker light bulb is 194NA.
The license plate light bulb is 2825, 98 on the 2003 Cadillac CTS.
The parking light bulb is 2825, 98.
The back up reverse light bulb is 3157.
The center high mount stop light bulb is PC175.
Both the dome light and map light use PC175 bulbs on this vehicle.
The trunk or cargo area light uses a 211-2 bulb.
The courtesy light bulb is 564.
Yes. Trim, market, and lighting package differences can change the exact bulb setup, especially for headlights and some exterior lamps, so it is important to verify the installed bulb and the lighting configuration on your specific CTS.