Acura RSX 2003 Bulb Size
Bulb size chart
This 2003 Acura RSX bulb size guide helps you verify the correct replacement bulb by lighting position, so you can match the right part before you buy. Whether you are replacing a headlight, interior lamp, or exterior signal bulb, the page is organized to make fitment checks easier for the RSX.
Bulb sizes on the 2003 Acura RSX can vary by trim, lighting package, body style, and market, so it is smart to confirm each location individually. Use this page to compare the bulb type for the front, rear, and cabin lights instead of assuming one bulb fits every socket.
For best results, compare the bulb listed here with the one already installed in your car before ordering, especially if your RSX has been modified or converted to LED lighting. Trim and package differences can affect fog lights, courtesy lights, and other positions, and aftermarket conversions may change the required bulb style or connector fit. If you are switching from halogen to LED, make sure the replacement is compatible with the housing and does not create clearance, beam pattern, or warning-light issues. When in doubt, remove the old bulb and check the base and markings directly so you can avoid ordering the wrong part.
FAQ
What bulb size does the 2003 Acura RSX use for the low beam headlights?
The low beam headlight bulb for the 2003 Acura RSX is H1.
What bulb size is used for the high beam headlights on a 2003 Acura RSX?
The high beam headlight bulb for the 2003 Acura RSX is H1.
What bulb fits the daytime running lights on this RSX?
The daytime running light bulb for the 2003 Acura RSX is H1.
What is the front turn signal bulb size on the 2003 Acura RSX?
The front turn signal light bulb is 7440.
What bulb does the rear turn signal use?
The rear turn signal light bulb on the 2003 Acura RSX is 7440.
What bulb size is used for the brake lights and tail lights?
Both the brake light bulb and the tail light bulb are 7443R on the 2003 Acura RSX.
What bulb fits the center high mount stop light?
The center high mount stop light bulb is 7440.
What bulb size is used for the back up reverse lights?
The back up reverse light bulb for the 2003 Acura RSX is 7440.
What bulb is used for the front parking lights and front side marker lights?
The front parking light bulb and the front side marker light bulb are both 2827.
What bulb fits the rear side marker light?
The rear side marker light bulb is 168NA.
What bulb size is used for the dome light and map lights?
Both the dome light bulb and the map light bulb are DE3175.
What bulb does the glove box light use?
The glove box light bulb is DE3021, and it is listed as optional.
What bulb size is used for the license plate lights?
The license plate light bulb is 168 or 917.
What bulb fits the trunk or cargo area light?
The trunk or cargo area light bulb is 168 or 917.
What bulb size is listed for the automatic transmission indicator light?
The automatic transmission indicator light bulb is 2721.
What bulb fits the courtesy lights?
The courtesy light bulb is 2721.
What fog light bulb options are listed for the 2003 Acura RSX?
The front fog light bulb is listed as H11 LED or H16 LED, depending on the setup and conversion used.
Can trim or market differences change the bulb size on a 2003 Acura RSX?
Yes. Trim, lighting package, body style, and market can affect certain bulb positions, so it is best to verify each location on the vehicle before buying replacements.
Should I check the installed bulb before ordering replacements?
Yes. Checking the installed bulb is the safest way to confirm fitment, especially if the car has aftermarket parts, LED conversions, or previous repairs.