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The best automotive replacement headlamp relays you can buy

AI-shortlisted picks, with current prices and ratings.

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The best automotive replacement headlamp relays you can buy

AI-generated summary · updated August 8, 2026 · verify details before purchase.

  1. ACDelco 12-Volt Headlamp Relay
    Best overall ACDelco

    ACDelco 12-Volt Headlamp Relay

    4.6/5 $42.00

    OEM quality relay for most GM vehicles, reliable and durable.

    • OEM fit and function
    • Durable construction
    • Easy to install
    • May not fit all aftermarket setups
    View on Amazon
  2. TruTech 12V 30/40A Headlight Relay
    Best budget pick IGOYE

    TruTech 12V 30/40A Headlight Relay

    4.5/5 $8.99

    Affordable universal relay with high amperage rating for brighter lights.

    • Very affordable
    • High amperage rating
    • Universal fit
    • Plastic housing less durable
    View on Amazon
  3. Standard Motor Products RY-59 Headlamp Relay
    Best quality Standard Motor Products

    Standard Motor Products RY-59 Headlamp Relay

    4.7/5 $41.99 Only 1 left

    Premium aftermarket relay with excellent reviews for longevity and performance.

    • High quality construction
    • Long lifespan
    • Direct replacement for many vehicles
    • Slightly higher price
    View on Amazon
  4. Speedway Motors Headlight Relay Kit
    Best kit Speedway Motors

    Speedway Motors Headlight Relay Kit

    4.4/5 $61.99

    Complete relay harness kit for improved headlight voltage and brightness.

    • Complete kit with wiring
    • Improves light output
    • Includes instructions
    • More expensive than single relay
    • Installation requires wiring work
    View on Amazon
  5. EPAuto 12V 40A Relay (Pack of 2)
    Best value pack EPAuto

    EPAuto 12V 40A Relay (Pack of 2)

    4.5/5 $11.97

    Two-pack of reliable 40A relays for headlight or other automotive uses.

    • Great value for two relays
    • Good build quality
    • Versatile use
    • Not specifically designed for headlights
    View on Amazon
  6. T-Y 12V 30A SPDT Relay (Pack of 5)
    Bulk buy iRhapsody

    T-Y 12V 30A SPDT Relay (Pack of 5)

    4.6/5 $12.99

    Five-pack of standard relays ideal for multiple replacements or projects.

    • Very economical per relay
    • Includes mounting bracket
    • Widely compatible
    • May not meet OEM specs for some vehicles
    View on Amazon
  7. Nilight 12V 40A Relay with Harness
    With harness Nilight

    Nilight 12V 40A Relay with Harness

    4.4/5 $12.15

    Relay with pre-wired harness for easy installation in lighting upgrades.

    • Pre-wired harness saves time
    • 40A capacity
    • Water-resistant
    • Harness quality varies
    • Not a direct OEM replacement
    View on Amazon

Buying advice

When choosing a headlamp relay, consider your vehicle's make and model to ensure compatibility. OEM or high-quality aftermarket relays (like Standard Motor Products) offer better durability and fit. For upgrades, a relay kit with harness can improve headlight brightness. Budget options work but may have shorter lifespan. Check amperage rating: at least 30A for standard, 40A for higher loads.

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