Ignitions and Electrical› Ignition Components

Ford Motorcraft

SP-589 Spark Plug

$5.38

SKU: SP589

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Motorcraft SP589 is an OEM iridium spark plug designed to maintain peak engine performance across a wide range of Ford engines. Featuring a copper core and a durable iridium alloy tip, this plug is manufactured to exact factory specifications for consistent ignition and reliability.
Show original supplier description
The Motorcraft SP-589 is a genuine OEM spark plug specifically engineered and manufactured to meet Ford's exact factory specifications. Its electrode design promotes a strong, consistent spark, which aids in complete fuel combustion, helping to reduce misfires, improve throttle response, and maintain a stable idle. Motorcraft engineers calibrate the heat range of the SP-589 specifically for Ford engines, ensuring optimal thermal balance and long-term reliability. The plug is produced to precise OEM dimensions, guaranteeing direct-fit compatibility with designated Ford engines. This means professional mechanics can expect predictable installation, correct torque seating, and reliable ignition performance across all cylinders, while DIY mechanics can install with confidence. Replacing worn spark plugs with genuine Motorcraft OEM components like the SP-589 is essential for restoring engine performance, improving fuel efficiency, and supporting emissions control systems. In modern engines, where precise ignition timing and combustion quality are paramount, using OEM spark plugs is especially critical for overall engine health and longevity.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandFord Motorcraft
Part NumberSP589
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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