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Genuine Motorcraft Tune-Up Kit DG520 Ignition Coils & SP520 Spark Plugs (Set of 6) | OEM for Ford 3.5L/3.7L V6
Description
Restore your V6's factory fire. Stuttering at stoplights or losing punch on the highway? It's time for a complete ignition overhaul. The Genuine Motorcraft DG520 & SP520 Kit is the factory-matched tune-up solution that syncs perfectly with your vehicle's PCM. Skip buying parts piecemeal — this full set of 6 coils and 6 plugs eliminates misfires and brings back your engine's original smooth idle and crisp throttle response.
Technical Significance
A V6 engine is only as strong as its weakest spark. The DG520 coils use a Ford-patented spring assembly to suppress RFI (radio frequency interference) and protect your vehicle's sensitive electronics. Paired with SP520 platinum plugs, the kit holds a precise 0.054" gap and high-voltage resistance that generic copper plugs simply can't match. Replacing coils and plugs together prevents the cascading failure where old plugs overwork and burn out new coils.
OEM vs. Aftermarket Comparison
| Feature | Genuine Motorcraft Kit (This Product) | Budget Aftermarket Sets |
|---|---|---|
| Spark Timing | OEM precision (matched to PCM) | Prone to timing drift and lag |
| Boot Material | High-grade dielectric silicone | Cheap rubber that degrades/sticks |
| Insulation | Internal arcing protection | Risk of misfire under load |
| Durability | 60,000–100,000 mile life | Often fails within 12,000 miles |
Package Contents
- (6) Genuine Motorcraft ignition coils (Part #DG520 / 7T4Z-12029-E)
- (6) Genuine Motorcraft platinum spark plugs (Part #SP520 / CYFS-12F-5)
- Factory-sealed original packaging — guaranteed authentic
Vehicle Compatibility
A direct OEM fit for many Ford, Lincoln, and Mercury naturally aspirated 3.5L and 3.7L V6 engines:
- Ford Edge: 2007–2018 (3.5L / 3.7L)
- Ford Explorer: 2011–2019 (3.5L / 3.7L)
- Ford F-150: 2011–2017 (3.5L Ti-VCT / 3.7L)
- Ford Mustang: 2011–2017 (3.7L V6)
- Ford Taurus / Flex: 2008–2019 (3.5L Non-EcoBoost)
- Lincoln MKX / MKZ / MKS: 2007–2018 (3.5L / 3.7L)
- Ford Transit-150/250/350: 2015–2019 (3.7L)
Interchange / Cross-Reference: DG520, 7T4Z-12029-E, SP520, CYFS-12F-5.
NOT for 3.5L EcoBoost (turbo) models. Message us your VIN for a 100% fitment check.
Service Indicators
- Check-engine codes P0300 through P0306 (cylinder misfires)
- Rough idling — the car feels like it wants to stall
- Poor fuel economy as the engine struggles to ignite fuel
- Sluggish acceleration — the vehicle stumbles when passing
Not sure it fits? Send us your VIN or Engine Serial Number (ESN) and we'll confirm 100% compatibility before you buy. Brand new, factory-sealed, and shipped fast.
Recently viewed
Customer Reviews
5.0 / 5
★★★★★
Based on 2 reviews
-
★★★★★ F-150 3.5L runs like new — best $$ I've spent on it
2014 F-150 with the 3.5 Ti-VCT started stumbling at idle and throwing a P0302 code. Replaced all 6 coils and plugs with this kit. Smooth as silk ever since — no codes for 6 months. This is what happens when you use OEM parts instead of cheap Amazon specials. Highly recommend.
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★★★★★ Fixed cold start rough idle on my Taurus SHO
Had a rough idle every morning on my 2012 Taurus 3.5L. Dealer quoted $600+ for coils and plugs. Ordered this kit for a fraction of that and installed it myself in an hour. Cold starts are buttery smooth now and fuel economy improved noticeably on my commute. OEM quality at a fair price.
Frequently asked questions
How do I know this part fits my vehicle?
Every listing includes a full compatibility list by make, model, year, and engine. If you're unsure, send us your VIN or Engine Serial Number (ESN) via the chat or contact page and we'll confirm fitment before you order.
Are these genuine OEM parts or aftermarket alternatives?
Every product we sell is 100% genuine OEM — factory-sealed and sourced directly from the manufacturer or authorized distributors. We do not sell aftermarket substitutes or white-box alternatives.
Do I need a professional to install these parts?
Most fuel filters and basic maintenance components are straightforward DIY installs with basic hand tools. We recommend consulting your vehicle's service manual for torque specs and bleed procedures. For ignition components and TPMS sensors, a relearn procedure may be required — see the product description for details.