Motorcraft SP-532 Iridium Spark Plugs

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$6.29at Ford Parts GiantChecked 7 min ago

55% under what the other stores charge

Compared across 6 stores. Prices are checked against each store and labelled with when.

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What reviewers say

Owners mostly treat the SP-532 as the safe stock replacement: it fits, runs clean and improves mileage on tired engines. The main doubts are longevity and whether it is truly iridium-grade compared with NGK.

What people mention

FitPraisedOwners say it drops into Ford, Lincoln and Mercury engines as an exact original-equipment replacement.
Fuel mileagePraisedSeveral report better fuel economy and smoother running after fitting a fresh set.
LongevityCriticisedReviewers doubt the 100,000-mile claim and say the plugs wear out sooner than expected.
BuildMixedThe one-piece design is seen as an improvement on the SP-519, but some question whether the iridium is genuine quality.
ValuePraisedBuyers call it good value as an OEM part for the job it does.

About the Motorcraft SP-532 Iridium Spark Plugs

The Motorcraft SP-532 is an iridium spark plug. It is original equipment on Ford Motor Company vehicles and is engineered to Ford standards. It fits Ford, Lincoln and Mercury vehicles.

The center electrode tip is iridium and the ground electrode tip is platinum. The plug resists oxidation and arc erosion, and a multi-rib insulator protects against misfire. Each plug is matched to specific engines to improve durability, eliminate misfires, reduce fuel consumption and optimize emissions.

Service intervals are up to 100,000 miles.

Brand

Motorcraft

Model

SP-532

Type

Iridium spark plug

Center electrode

Iridium tip

Ground electrode

Platinum tip

Vehicle brands

Ford, Lincoln, Mercury

Vehicle type

Car

Service interval

Up to 100,000 miles

What buyers say

Buyers like

Great OEM replacement for Ford vehicles
Improved fuel mileage and running after replacement
Good value for the price
Works well in supercharged Coyote 5.0
Can be re-gapped and cleaned to extend life
Better than the older two-piece SP-519 design

Buyers complain about

One reviewer received a used, returned plug in a set of four
Reviewers say they likely won't last the claimed 100,000 miles
Not iridium quality and don't last as long as NGK, per a reviewer

Questions and answers

Are these the right plugs for my Ford?

They are original equipment on many Ford, Lincoln and Mercury engines, including the supercharged 5.0 Coyote. Check your engine code against the SP-532 application list before buying, since Ford uses different plugs across engines.

How often should they be changed?

Motorcraft rates them for service intervals up to 100,000 miles. Some owners report shorter life in practice, so follow your owner's manual interval and inspect the plugs if the engine starts misfiring or idling rough.

Are they better than the older SP-519?

Yes, by owner accounts. The SP-532 is a one-piece design, while the SP-519 was two-piece and prone to separating, so most owners treat the SP-532 as the safer replacement.

How do they compare with NGK iridium plugs?

They are the exact-fit OEM choice, which matters most on stock Ford engines. Some reviewers say NGK iridium plugs last longer, so pick NGK if longevity is your priority and the heat range matches.

Can I re-gap and reuse them?

Owners say the plugs can be cleaned and re-gapped to extend life. Use a gap gauge and the gap specified for your engine, and avoid bending the iridium tip roughly.

What comes in the box?

The plugs are sold in multi-packs, so check the pack count before ordering. Each plug comes ready to install; you supply the gap gauge and torque wrench.

Where is the Motorcraft SP-532 Iridium Spark Plugs cheapest?

At Ford Parts Giant, for $6.29, 55% under what the other stores charge, as of our latest check.

What do buyers say about the Motorcraft SP-532 Iridium Spark Plugs?

Buyers like: Great OEM replacement for Ford vehicles; Improved fuel mileage and running after replacement; Good value for the price. Common complaints: One reviewer received a used, returned plug in a set of four; Reviewers say they likely won't last the claimed 100,000 miles.

Where can I buy the Motorcraft SP-532 Iridium Spark Plugs?

6 stores we checked sell it, including Ford Parts Giant, Freedom Racing Tool and Auto, CarParts.com, Ford Parts Catalog, eBay.