Published by SayParts | Ford OEM Parts Experts
Motorcraft SP-433 Spark Plug 6-Pack — Complete Guide for Ford Escape, Taurus & Freestyle 3.0L V6 Owners
If you own a Ford Escape, Taurus, Five Hundred, or Freestyle with the 3.0L DOHC V6 engine, replacing your spark plugs with the correct Motorcraft SP-433 is one of the easiest and most impactful maintenance jobs you can do. In this guide we'll explain what makes the SP-433 the right plug for your engine, how often to replace it, and why doing all 6 at once is the smart move.
What is the Motorcraft SP-433?
The SP-433 (OEM number AGSF32WM) is the genuine Motorcraft platinum spark plug for Ford's 3.0L DOHC Duratec V6 engine. It features a platinum center electrode for superior resistance to erosion, comes pre-gapped from the factory, and delivers a service interval of 60,000 to 100,000 miles. It's the only spark plug recommended by Ford Motor Company for this engine.
Key features
Platinum center electrode — superior resistance to erosion vs. standard nickel plugs
Pre-gapped from the factory — no adjustment needed
Conical seat design — no gasket required
Multi-rib insulator — prevents misfire and false check engine lights
Service interval: 60,000–100,000 miles
Motorcraft 2-year / unlimited mile warranty
The only plug recommended by Ford for the 3.0L DOHC Duratec V6
Symptoms of worn spark plugs
Rough idle or engine shaking
Hesitation during acceleration
Poor fuel economy
Hard starting — especially in cold weather
Check engine light with misfire codes P0300–P0306
Reduced engine power
On the Ford 3.0L V6, worn spark plugs often go hand in hand with failing ignition coils. If you're seeing misfire codes, check both your plugs and your DG-513 coils before deciding what needs replacing.
How often should you replace the SP-433?
Every 60,000 miles under normal driving conditions
Every 100,000 miles with platinum plugs if the engine is running well
Immediately if misfire codes appear or rough running starts
Always replace all 6 at once — uneven plug wear across cylinders causes rough running
Vehicle compatibility
2001–2008 Ford Escape 3.0L DOHC V6
2000–2007 Ford Taurus 3.0L DOHC V6
2005–2007 Ford Five Hundred 3.0L V6
2005–2007 Ford Freestyle 3.0L V6
2005–2008 Mercury Mariner 3.0L V6
2000–2005 Mercury Sable 3.0L DOHC V6
2005–2007 Mercury Montego 3.0L V6
OEM part number: AGSF32WM. Also listed as SP-433X on some AutoZone listings.
How to replace SP-433 spark plugs — under 30 minutes
Let the engine cool completely before starting
Disconnect the negative battery terminal
Remove the ignition coil from the first cylinder
Use a 5/8" spark plug socket with extension to remove the old plug
Install the new SP-433 by hand first to avoid cross-threading
Torque to 11 ft-lbs — do NOT overtighten
Reinstall the DG-513 ignition coil and repeat for all 6 cylinders
Reconnect the battery and test drive
💡 Pro tip: Replace your DG-513 ignition coils at the same time as your SP-433 spark plugs for a complete tune-up. If your plugs are due, your coils have the same mileage — do both jobs in one session and avoid coming back under the hood again soon. Check our DG-513 6-Pack: https://sayparts.com/products/motorcraft-dg-513-ignition-coil-6-pack-ford-escape-taurus-3-0l-v6
🎥 Every order from SayParts includes a FREE step-by-step installation video covering the complete SP-433 6-plug replacement on your Ford 3.0L V6.
Why buy from SayParts?
6 x Genuine Motorcraft SP-433 plugs with 2-year Ford warranty
Free installation video with every order
Free worldwide shipping
VIN verification available — not sure if this fits? Contact us before ordering
Keep your Ford 3.0L V6 running smooth and efficient with the correct Motorcraft SP-433 spark plugs — the only plug Ford recommends for your engine.
👉 Order the Motorcraft SP-433 6-Pack at SayParts: https://sayparts.com/products/motorcraft-sp-433-spark-plug-6-pack-ford-escape-taurus-3-0l-v6
👉 Complete the tune-up — add DG-513 Ignition Coil 6-Pack: https://sayparts.com/products/motorcraft-dg-513-ignition-coil-6-pack-ford-escape-taurus-3-0l-v6
Fits 2001–2008 Ford Escape, 2000–2007 Ford Taurus, 2005–2007 Ford Five Hundred & Freestyle, and Mercury Mariner, Sable & Montego with 3.0L DOHC V6. Verify fitment with VIN before ordering.