2 Years Available
Mercury S-55 Light Bulb Sizes
Complete bulb size reference for the Mercury S-55 from 1966 to 1967. Find headlight, fog light, turn signal, and brake light bulb sizes for every model year.
Every Mercury s-55 from 1966 to 1967 uses the same H5006 low beam bulb — once you confirm your year is within this range, you only need one part number.
Year Range
1966 – 1967
2 model yearsBulb Sizes Across Years
| Position | Bulb Type(s) | Years | Status |
|---|---|---|---|
| High Beam | H5001(1966–1967) | 2 years | Consistent |
| Low Beam | H5006(1966–1967) | 2 years | Consistent |
| Turn Signal Front | 1157A(1966–1967) | 2 years | Consistent |
| Brake Light | 1157(1966–1967) | 2 years | Consistent |
| Turn Signal Rear | 1157(1966–1967) | 2 years | Consistent |
| Tail Light | 1157(1966–1967) | 2 years | Consistent |
| Parking Light | 1157A(1966–1967) | 2 years | Consistent |
Common S-55 Replacement Parts
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Frequently Asked Questions
We have bulb size data for the Mercury S-55 from 1966 to 1967, covering 2 model years. Select your year below for a complete position-by-position bulb chart.
No, the Mercury S-55 has used the H5006 low beam bulb consistently across all 2 model years in our database. Any year in the 1966–1967 range uses the same bulb.
The Mercury S-55 uses a H5006 bulb for the low beam and a H5001 for the high beam. Select your year below for the exact fitment chart.
Yes. The Mercury S-55 uses a H5006 low beam, and direct-fit LED conversion kits for that size are widely available. LED upgrades typically produce 2–3× more light output than stock halogen and last 25,000+ hours. Look for a DOT-compliant kit with a proper beam cutoff pattern.
Select your model year from the list below. Each year page shows every bulb position — low beam, high beam, fog light, turn signal, and brake light — with the correct size and a link to buy it on Amazon.