Used for: Fog Light Bulb Front
Used for: Headlight Bulb High Beam, Daytime Running Light Bulb
Used for: Back Up Reverse Light Bulb
Used for: Brake Light Bulb, Tail Light Bulb
Used for: Center High Mount Stop Light Bulb
Used for: License Plate Light Bulb, Courtesy Light Bulb
Used for: License Plate Light Bulb, Courtesy Light Bulb
Used for: Parking Light Bulb, Side Marker Light Bulb Front, Turn Signal Light Bulb Front
Used for: Side Marker Light Bulb Rear
Used for: Turn Signal Light Bulb Rear
Used for: Dome Light Bulb
Used for: Glove Box Light Bulb
This page helps you verify the bulb sizes for the 2003 Toyota Highlander by lighting position, so you can match the correct replacement before you buy. Whether you are changing a headlight, interior bulb, or rear lamp, checking the exact socket location is the safest way to avoid ordering the wrong part.
The 2003 Toyota Highlander uses different bulb types depending on the lamp location, and some positions may vary by trim, market, or body style. Use the bulb chart on this page to confirm the fit for each light, especially if you are replacing more than one bulb at the same time.
For best fitment, compare the bulb in your vehicle with the listing before ordering, since trim package differences and regional lighting setups can change what is installed. This is especially important when switching between halogen and LED replacements, because LED retrofit bulbs may fit physically but still need proper polarity, clearance, or load handling. Aftermarket conversions can also affect beam pattern and brightness, so it is wise to test the lights after installation. If you are unsure, remove the installed bulb first and match the base and marking before purchasing a replacement.
The high beam bulb size listed for the 2003 Toyota Highlander is 9005.
The daytime running light bulb size listed is 9005.
The front turn signal bulb size listed for this vehicle is 7528.
The parking light bulb size listed is 7528.
The front side marker light bulb size listed is 7528.
The front fog light bulb size listed is H3C.
The rear brake light bulb size listed is 7443R.
The tail light bulb size listed is 7443R.
The rear turn signal light bulb size listed is 7440A.
The back up reverse light bulb size listed is 7440.
The center high mount stop light bulb size listed is 921.
The license plate light bulb sizes listed are 168 and 917.
The dome light bulb size listed is DE3175.
The glove box light bulb size listed is 2721.
The courtesy light bulb sizes listed are 168 and 917, which are also listed for the license plate light on this page.
Yes. Trim and lighting package can vary by market and body style, so it is best to confirm the installed bulb before ordering.
