NPAUTO Ignition Coil Pack Kit for 3.5L V6 EcoBoost – 6-Pack UF646 Replacement, Direct Fit for Ford & Lincoln (2011–2019)

Replacement six-pack ignition coil set for 3.5L V6 EcoBoost engines that restores reliable spark delivery across compatible Ford and Lincoln models.

This NPAUTO UF646 ignition coil pack kit contains six aftermarket high-performance coils engineered to match the fit and firing requirements of 3.5L V6 EcoBoost engines used in many Ford F-150, Expedition, Explorer, Flex, Taurus, Transit, Lobo models and Lincoln counterparts from 2011–2019 (see compatibility list). Each coil is designed to be a direct physical replacement for the listed OEM part numbers so you can swap them in without custom adapters. The set addresses common coil-failure symptoms such as misfires, rough idle, power loss, and reduced fuel efficiency by providing consistent voltage to spark plugs.

Which vehicles will these NPAUTO coils fit?

The kit is specified for 3.5L V6 EcoBoost applications across a range of Ford and Lincoln vehicles. Compatibility covers multiple model years and trim levels; always cross-check your vehicle’s VIN or current coil part number against the interchange list before ordering.

• Ford F-150 (2011–2016) and F150 variants listed in compatibility
• Expedition (2015–2017), Explorer, Flex, Taurus, Transit and Lobo models as specified
• Lincoln MKS, MKT, Navigator (2013–2017) per the interchange references
• Interchange numbers: UF646 / UF-646 / DG549 / IC749 and OEM references such as BL3Z-12029-C

How do these coils improve engine performance and drivability?

When installed as a matched set, fresh ignition coils help restore steady spark timing and energy, which reduces misfires and smooths idle. That improved spark consistency supports more complete combustion under load, which often results in more predictable power delivery and can help return lost fuel economy caused by failing coils.

• Reduces engine misfire frequency when coils are the cause
• Stabilizes idle and reduces rough-running at low RPM
• Helps recover lost throttle response and drivability
• Matches OEM electrical and mounting dimensions for direct replacement

What should I check before ordering and installing this coil set?

Confirm fitment by comparing your vehicle’s engine code, production year, and existing coil part numbers to the interchange list. Also inspect spark plugs, wiring harnesses, and connectors — coils seldom fail in isolation, so replacing worn spark plugs and ensuring clean connector contacts will avoid repeat problems.

• Verify engine is the 3.5L V6 EcoBoost and year range matches listing
• Cross-reference OEM/interchange numbers: UF646, DG549, IC749, BL3Z-12029-C, etc.
• Replace spark plugs and clean connectors at the same time when possible
• Torque mounting bolts to factory specs and use dielectric grease on terminals

Are these coils a direct replacement and what’s included in the package?

Yes — the NPAUTO UF646 set is sold as a group of six coils sized to directly replace the OE coils used in qualifying 3.5L EcoBoost engines. The box contains six ignition coils; no additional hardware is typically required for a standard swap, but always confirm with vehicle-specific service information.

• Package contains 6 ignition coils — one per cylinder for V6 applications
• Designed to fit existing OEM mounting points and electrical connectors
• Sold as an aftermarket high-performance replacement for listed OEM numbers
• Check vehicle-specific instructions for any seals, clips, or bolt reuse

Who is this for: This six-coil NPAUTO kit is aimed at owners and technicians working on 3.5L V6 EcoBoost Ford and Lincoln models who need a reliable, cost-effective replacement for failing ignition coils. It’s especially useful for vehicles showing misfires or rough idle where coils are diagnosed as the root cause, and for anyone doing preventive maintenance during spark-plug service on compatible model years.