12V 20A 4-Pin Automotive Small Car Relay

Keep your vehicle's electrical systems running smoothly with this compact 12V 20A 4-pin automotive relay. Designed as a direct replacement for small Denso-style relays (Part No. 156700-3220), this relay is ideal for a wide range of automotive switching applications including lighting, cooling fans, horns, fuel pumps, and more. Brand new and ready to install right out of the box.

Key Specifications

Condition: 100% Brand New
Color: Blue
Operating Voltage: 12V DC
Current Rating: 20A
Pin Configuration: 4-Pin
Dimensions: 2.5 × 2 × 1.5 cm (compact form factor)
Part Number: 156700-3220
Package Includes: 1 × Car Relay

Why Choose This Relay?

✅ Compact & Lightweight: Small form factor fits tight engine bay spaces with ease
✅ 20A Rated: Handles a broad range of automotive electrical loads reliably
✅ Universal Compatibility: Suits most 12V automotive systems as a replacement or upgrade relay
✅ Standard 4-Pin Design: Simple, straightforward wiring for quick installation
✅ Brand New: Fresh stock, not refurbished or used

Common Applications

This small automotive relay is suited for use with headlights, fog lights, horn circuits, fuel pumps, cooling fans, electric windows, and other 12V switching circuits in cars, motorcycles, trucks, and other vehicles.

Made in Mainland China.

Safety & Electrical Standards

For guidance on safe automotive electrical work and wiring practices, refer to resources from the U.S. Consumer Product Safety Commission (CPSC).

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Frequently Asked Questions

Q: What vehicles is this 12V 20A 4-pin automotive relay compatible with?

A: This relay is designed for use in most standard 12V automotive electrical systems, including cars, trucks, motorcycles, and vans. It is a direct-style replacement for small 4-pin Denso relays (156700-3220) and can also be used as a universal relay for lighting, fan, horn, and pump circuits wherever a 12V 20A 4-pin relay is required.

Q: How do I install a 4-pin car relay?

A: A 4-pin relay typically has two control pins (coil/trigger) and two power pins (common and normally open contact). Simply match the pin layout to your vehicle's relay socket or wiring diagram. Always ensure the vehicle ignition is off before installing or replacing a relay, and consult your vehicle's service manual for the correct wiring configuration.

Q: Is this relay brand new or refurbished?

A: This relay is 100% brand new — not refurbished, reconditioned, or used. Each package contains one new relay ready for installation.

Q: What is the maximum current this relay can handle?

A: This relay is rated at 20 amps (20A) at 12V DC, making it suitable for a wide range of automotive electrical loads such as lights, fans, horns, and fuel pumps.