5 Vehicles
631 Bulb Fitment Guide
The 631 bulb is used by 5 vehicles from 1 makes. Commonly found in Trunk Light positions.
Positions
1
Trunk LightVehicles
5
Makes
1
Compatible Vehicles
| Model | Years | Positions | View |
|---|---|---|---|
| Mustang | 1964–1968 | Trunk Light | Details |
Frequently Asked Questions
The 631 bulb is used by 5 vehicles from 1 makes including Ford. Browse the full compatibility list below.
Yes, LED replacements are available for the 631 bulb size. LED 631 bulbs offer brighter output, longer lifespan, and lower power consumption compared to halogen.
The 631 bulb is commonly used in these positions: Trunk Light. The exact position depends on your vehicle's make and model.
Standard halogen 631 bulbs typically cost $10–$30 for a pair. LED 631 conversion kits range from $25–$60. Premium brands may cost more but often offer better performance and warranty.
All 631 bulbs share the same base and fitment, but they vary in technology (halogen, LED, HID), brightness, color temperature, and brand quality. We recommend LED for the best balance of brightness and lifespan.