Is this a genuine motorcraft part? Some of the reviews seem to say otherwise.

it is a motorcraft part. I installed it in my Mercury and it is working fine

What activates the relay... positive to the small post or negative?

The small post is the 12 volts (positive) from the switch inside the vehicle when it is in the start position. There is no negative to this solenoid other than the case itself. The negative is through the chassis ground. If you have a negative wire it would go to the screws that hold the unit to the firewall.

Got one a couple months ago and delivered in authentic looking Motorcraft box, on box bottom says "Assembled in Mexico" - works like a champ.

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⚡ Start Strong, Stay Strong – The Relay That Powers Your Drive

BUILT TO LAST - Abrasion and corrosion-resistant materials guarantee long-term durability
PLUG PLAY CONFIDENCE - Direct OEM replacement with through-hole mounting for hassle-free installation
POWER UP WITH PRECISION - 12V coil voltage ensures reliable automatic operation every time
MADE IN THE USA TRUSTED WORLDWIDE - Motorcraft craftsmanship delivers OEM-grade quality you can count on
COPPER CONTACTS FOR PEAK PERFORMANCE - High-quality copper contact material maximizes conductivity and starter efficiency

The Motorcraft SW-1951-C Starter Motor Relay is a high-quality, OEM direct-fit replacement designed for 12V DC systems. Featuring abrasion and corrosion-resistant materials, copper contacts, and through-hole mounting, it ensures reliable automatic operation and lasting durability. Made in the USA, this relay offers professional-grade performance and easy installation for seamless vehicle maintenance.

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S$166

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

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Connector Type	Through Hole Or Surface Mount
Contact Material	Copper
Contact Type	Normally Open
Mounting Type	Through Hole Mount
Brand	Motorcraft
Operation Mode	Automatic
Coil Voltage	12 Volts (DC)
Number of Terminals	2
Specification Met	OEM
UPC	031508265110
Manufacturer	Motorcraft
Model	SW-1951-C
Product Dimensions	7.85 x 7.04 x 9.35 cm; 300 g
Item model number	SW-1951-C
Exterior	Chrome
Manufacturer Part Number	SW-1951-C
OEM Part Number	SW1951C
Material	100% Motorcraft
Colour	Black
Assembly Required	No
Manufacturer	Motorcraft
Country of Origin	USA
Item Weight	300 g

Motorcraft SW-1951-C Relay Assy-Starter Motor

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