Original Equipment Finewire Double Platinum Spark Plug
Hover over the image to zoom in
Share this:

Motorcraft Original Equipment Finewire Double Platinum Spark Plug

Part No. SP-478 Warranty Details  

See if this part fits a specific vehicle.

Check Vehicle Fit

Motorcraft Original Equipment spark plugs are designed, engineered and recommended by Ford Motor Company.

Product Features:
  • Same part installed when the engine rolled off the assembly line
  • 100,000-mile service interval
  • Iridium-enhanced center electrode for improved durability and wear resistance
  • .6 mm finewire design improves ignitability
  • Designed for overall durability with virtually no gap erosion
Back To Top
Electrode Core Material:Copper Core
Electrode Tip Material:Iridium Alloy
Ground Strap Quantity:1
Insulator Type:Standard
Manufacturer Heat Range:4
Reach:1.000 in
Resistor:Yes
Seat Type:Tapered
Thread Diameter:14 mm
Tip Configuration:Ir Finewire Double Platinum
Type:Finewire Double Platinum Spark Plug
Wrench Diameter:5/8 in

REVIEW SNAPSHOT®

by PowerReviews
MotorcraftOriginal Equipment Finewire Double Platinum Spark Plug
 
3.6

(based on 8 reviews)

Ratings Distribution

  • 5 Stars

     

    (3)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (1)

50%

of respondents would recommend this to a friend.

Pros

  • Easy to install (4)
  • Improves engine efficiency (4)

Cons

No Cons

Best Uses

  • Everyday driving (5)
  • Replacement (4)
    • Reviewer Profile:
    • Casual driver (3)

Reviewed by 8 customers

Displaying reviews 1-8

Back to top

 
1.0

Doesn't fit CX9

By 

from Thomasville, NC

Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

Doesn't fit 07 CX9

  • Was this a gift?:
  • No
 
2.0

NOT an exact fit for Mazda SPEED 6

By 

from Conway, AR

About Me Auto Enthusiast, Casual Driver

See all my reviews

3 or more reviews submitted

Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

Like numerous items on this website, these plugs ARE NOT compatible with the 2.3L Mazda Speed 6 turbocharged engine. Mine is a 2006 model. The service manual states the Speed 6 engine is an LC with TC. All of the information in the Advanced database apparently is the AJ series motor. The pre-gap sizes are not good for our 2.3L TC motors. Their system has it at .050, and the manufacturer calls for .030. Even after re-gapping them myself, the car still idles poorly on start up. Will be replacing them. I like Advanced Auto, but no longer will I trust their car database for my application. (Neither air or cabin filter I purchased fit my Mazda SPEED 6.)

 
3.0

Not great for Mazda 2.5L!

By 

from Rochester, NY

About Me Auto Enthusiast

Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

I do not recommend this part for the 2.5L Mazda MZR (not SkyActiv) engine, even though it's listed as an exact fit (and confirmed on Motorcraft's website).

The threaded portion is about 1/4 inch too short. It works, but in steady cruising (such as highway), there are random misfires. I believe that this is because the spark plug doesn't extend far enough into the combustion chamber.

I'd recommend NGK for the Mazda 2.5L MZR engine! This may work just fine for other engines - check to make sure the dimensions match the plug you're taking out!

 
5.0

Original equipment at a great price!

By 

from Minnesota

About Me Mechanic

Verified Buyer

Pros

  • Durable
  • Easy To Install
  • Improves Engine Efficiency
  • Increases Power
  • Lightweight

Cons

    Best Uses

    • Everyday Driving
    • Replacement
    • Restoration

    Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

    It is original equipment at a great price

    (1 of 1 customers found this review helpful)

     
    4.0

    Same as original

    By 

    from Miami

    About Me Casual Driver

    See all my reviews

    Verified Buyer
    3 or more reviews submitted

    Pros

    • Easy To Install

    Cons

    • No Improvement In Performance

    Best Uses

    • Everyday Driving
    • Replacement

    Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

    works well just like the original.

    (2 of 2 customers found this review helpful)

     
    5.0

    Great!

    By 

    from Northeast ohio

    Pros

    • Easy To Install
    • Improves Engine Efficiency

    Cons

      Best Uses

      • Everyday Driving
      • Replacement

      Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

      ZX2 with 178,000 miles. Use the original plug- these work great!

      (0 of 3 customers found this review helpful)

       
      4.0

      Spark Plugs

      By 

      from Knoxville, TN

      About Me Casual Driver

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Improves Engine Efficiency

      Cons

      • Difficult To Install

      Best Uses

      • Everyday Driving

      Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

      Good product

      (2 of 2 customers found this review helpful)

       
      5.0

      Motorcraft Spark Plugs

      By 

      from The Poconos Region, Pennsylvania

      See all my reviews

      Verified Buyer
      3 or more reviews submitted

      Pros

      • Easy To Install
      • Factory specifications
      • Improves Engine Efficiency
      • Increases Power
      • OEM for warranty specs
      • Same brand model as OEM

      Cons

        Best Uses

        • Everyday Driving
        • Replacement

        Comments about Motorcraft Original Equipment Finewire Double Platinum Spark Plug:

        Nice to have an auto parts store that still stocks OEM manufactured parts for those who prefer these items.

        • Car & Truck:
        • Auto Enthusiast, Casual Driver, Truck Enthusiast

        Displaying reviews 1-8

        Back to top

        Do you have questions about this product?

         

        Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

        4 Questions | 4 Answers
        Displaying questions 1-4
        • Q:

          1999 Ford ZX2 2.0 L DOHC Zetec engine- manual reads "Cylinders No. 1 and 2 have suffix F and cylinders numder 3 and 4 have FE suffix...use only plugs with the same service part number suffix letter PP" Does this mean I need two platinum spark plugs for cylinders 1 and 2 and two double platinums for cylinders 3 and 4?
          Asked on 11/2/2016 by illetan from Colorado Springs, CO

          1 answer

          • CUSTOMER CARE

            A:

            No, Illetan! We are not showing different plugs for cylinders 1&2 vs 3&4 on the ZETEC motor. I'd recommend the PTR5A-13 (Laser Platinum, best choice) ; LTR5IX-11 (Iridium IX next choice) ; and LTR5GP (G-Power Platinum last choice).

            Answered on 11/10/2016 by Solomon from AAP
        • Q:

          does this sparkplugs SP 478 are designed to a ford focus 2.0 zetec
          Asked on 10/8/2014 by Jimmy V from caracas

          1 answer

          • CUSTOMER CARE

            A:

            Hi Jimmy, glad to help you! This part is an exact fit for 2000 - 2007 Ford Foucs 2.0L.

            Answered on 10/9/2014 by Steve from AAP
        • Q:

          I have a 2001 Mercury Cougar (Not Cougar S) 2.0L. Is the spark plug already pre-gapped, or do I have to manually gap it?
          Asked on 12/11/2012 by Kevin

          1 answer

          • CUSTOMER CARE

            A:

            Yes, this Motorcraft Original Equipment Finewire Double Platinum Spark Plug (Part No. SP478) is pre-gapped at 0.05 inches. For further assistance, please feel free to call us at 1-877-238-2623 or visit your nearest Advance Auto Parts store and one of our representatives would be more than happy to assist you.

            Answered on 12/12/2012 by Steve from AAP
        • Q:

          I have a 1999 Ford Escort ZX2 and the factory original spark plugs read SP-478 AZFS32F while the ones I got from auto parts stores is SP-478 AZFS32FE. Are they the same? Which one is the best for my car?
          Asked on 6/2/2012 by Anonymous

          1 answer

          • CUSTOMER CARE

            A:

            This Motorcraft Original Equipment Finewire Double Platinum Spark Plug - part# SP478/ OE Number:AZFS32FE is also an exact spark plug for your 1999 Ford Escort ZX2. The FE designation was probably an update to the plug. The FE's are double platinums and the F's are single platinums. The F's don't have the little nubin on the top arm.

            Answered on 6/4/2012 by Vincent from AAP
        Displaying questions 1-4

        Do you have a question about this product? 

        Check out the specials in our monthly flyer.
         
         
        Disclaimer We strive to keep all information accurate and up-to-date; however, product availability, pricing, promotions and store hours are subject to change without notice. Please contact Customer Care if you have any questions or corrections.