How much does it cost to replace spark plugs on a Ford Expedition?
Most Ford Expedition spark plug replacements fall in the range of roughly $165 to $680, depending on the engine type (EcoBoost 3.5L V6 vs older 5.4L V8) and local labor rates. Do-it-yourself parts can be much cheaper, while a dealership or specialty shop tends to be at the higher end.
Engine options and plug counts
The Ford Expedition has used two common powertrains in recent years, and that choice affects both the number of spark plugs and the replacement process:
Older Expeditions: 5.4L V8
Typically uses 8 spark plugs (one per cylinder). Replacement tends to be more labor-intensive due to access, which can influence both time and cost.
Newer Expeditions: 3.5L EcoBoost V6
Typically uses 6 spark plugs (one per cylinder). Access is generally better than some older V8 setups, but the job still requires removing coils and careful handling of high‑pressure ignition components.
Cost ranges and what affects the price
Prices vary by engine, plug type, and labor rate. The ranges below include parts and labor and assume standard replacement of plugs without additional component changes.
- 3.5L EcoBoost V6 with 6 plugs: Parts typically $15–$60; labor about 1.5–2.5 hours; total estimated range roughly $165–$435.
- 5.4L V8 with 8 plugs: Parts typically $25–$80; labor about 2–4 hours; total estimated range roughly $235–$680.
Before you review the numbers, note that the following estimates reflect typical U.S. pricing for routine spark plug replacement as of 2024–2025. They assume no preexisting coil failures and no extra parts beyond the plugs themselves.
Prices can rise if the shop recommends replacing ignition coils, coil boots, or spark plug wires, or if diagnostic work is required to identify misfires or related issues.
DIY vs professional service
Doing the replacement yourself can dramatically reduce costs since you pay only for parts and any tools you may need. For a DIY approach, expect parts costs of roughly $20–$100 depending on plug type and the engine, plus any small consumables. A professional service includes labor, potential diagnostics, and often a warranty on the workmanship.
Before deciding, consider your comfort level with modern ignition systems. The EcoBoost setup uses coil-on-plug architecture, which is straightforward for many enthusiasts but still requires careful handling of coils and seals. The older 5.4L V8 can be more time-consuming due to access constraints.
What else to consider during service
During a spark plug replacement, technicians commonly inspect ignition coils, coil boots, and spark plug wires for wear. If any of these components show signs of deterioration, dealers or shops may recommend replacing them at the same time to prevent future labor costs and misfires. A thorough inspection can add to the initial quote but may save on future visits.
Maintenance intervals and plug types
Interval guidance varies by engine and plug type. Modern EcoBoost engines typically use iridium or platinum-tipped plugs with longer intervals, often around 100,000 miles, while copper plugs in older configurations may have shorter intervals (60,000–90,000 miles). Always follow the Ford owner’s manual for the exact interval and plug specification for your specific model year.
Summary
The cost to replace spark plugs on a Ford Expedition depends mainly on engine type and labor rates. Expect roughly $165–$435 for a 3.5L EcoBoost V6 (6 plugs) and about $235–$680 for a 5.4L V8 (8 plugs) when replacing plugs alone. DIY can lower costs further, while adding coils, wires, or diagnostic work can push the total higher. Always obtain a written estimate and consider a full inspection of ignition components to avoid later surprises.
Bottom line
For most Expeditions in daily use today, plan for a few hundred dollars in parts and labor if you’re having spark plugs replaced at a shop, with higher end estimates on older V8 models and in regions with higher labor rates. If you’re comfortable with car maintenance, doing it yourself is the most economical path, provided you use the correct plugs and torque specs for your engine.
