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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Motorcraft SW1951C New Solenoid

Product ID: 9878561

Details

Brand
Motorcraft
Connector Type
Through Hole
Contact Material
Copper
Contact Type
Normally Open
Mounting Type
Through Hole

⚡144W power output

🛠️Direct fit, easy install

🛡️Abrasion & corrosion resistant

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RM263

Duties & taxes included

In stock

Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Start Strong, Last Long – The Solenoid That Keeps You Moving

TRUSTED LEGACY - Motorcraft quality backed by Ford’s 24-month unlimited mileage warranty.
PROVEN RELIABILITY - Join over 1,000 satisfied users with a 4.7-star rating and counting.
PLUG PLAY PRECISION - Engineered as a direct fit replacement—no modifications, no hassle.
POWER PACKED PERFORMANCE - Delivers a robust 144-watt output for reliable engine starts every time.
BUILT TO BRAVE THE ELEMENTS - Crafted with abrasion and corrosion-resistant materials for unmatched durability.

The SW1951C New Solenoid by Motorcraft is a high-quality, direct-fit starter solenoid designed for seamless replacement in vehicles like the 1989 Bronco and 1991 Ford Mustang. Featuring 144 watts of power, abrasion and corrosion resistance, and backed by Ford’s 24-month unlimited mileage warranty, it ensures reliable engine starts and long-lasting durability trusted by over 1,000 customers.

Specifications

ASIN	B000C5FTKY
Best Sellers Rank	#40,841 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Replacement Starter Solenoids
Brand Name	Motorcraft
Color	Black
Customer Reviews	4.7 4.7 out of 5 stars (1,036)
Global Trade Identification Number	00031508265110
Included Components	SW-1951-C
Item Dimensions	3.09 x 2.77 x 3.68 inches
Item Type Name	Relay Assy - Starter Motor
Manufacturer	Motorcraft
Model	SW-1951-C
Part Number	SW-1951-C
UPC	031508265110
Unit Count	1.0 Count
Warranty Description	All Motorcraft and Ford Parts are covered by Ford's 24-month/Unlimited Mileage Limited Warranty
Wattage	144 watts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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