Symptoms
- Bulb prongs don't line up with the connector socket
- Bulb base is a different shape than the old one
- New bulb fits but light doesn't work or looks wrong
- Connector wires seem too short or wrong shape to reach
Likely causes
- CommonIncorrect bulb type or size purchasedHeadlight bulb types (like H11, 9005, H7) look similar but aren't interchangeable between different sockets.
- PossibleVehicle uses a different bulb than commonly listed onlineTrim level or model year variations can mean a different bulb than a generic lookup suggests.
- PossibleAftermarket LED conversion kit incompatibilityLED replacement bulbs can have different connector shapes that don't match factory harnesses.
What to do
- Check the old bulb's markings (usually printed on the base) to confirm the exact bulb type before buying a replacement.
- Compare the new bulb's base and connector shape directly against the old one before installing.
- Return or exchange the bulb at the store if it clearly doesn't match the size or connector shape.
- Double check your specific trim level's bulb requirement, since it can differ from generic online listings.
- If installing an LED conversion kit, confirm it's designed for a direct plug-and-play fit with your factory harness.
- Avoid forcing a bulb that doesn't fit, which can damage the connector or socket.
- Ask the parts store to verify fitment using your VIN if you're unsure which bulb your vehicle needs.
- Have a shop install the correct bulb if you're not confident matching part numbers yourself.
Tools and parts
- Old bulb (for comparison)
- VIN number for lookup
Correct headlight bulb typeSearch: “headlight bulb for [your car make model year VIN lookup]”
When to call a pro
Most auto parts stores will exchange a wrong-fit bulb at no cost if you bring it back with the receipt and confirm the correct part number.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.