NGK 49171 Ignition Coil

NGK COP Ignition Coil Multi-Pack for Ford V8 Applications

NGK Part Number 49171 is a distributorless COP (coil on plug) ignition coil built for 12-volt systems and OE-style service on select Ford, Lincoln, and Mercury vehicles. It is engineered to meet or exceed OE standards for durability and consistent ignition performance, with coverage that includes late-model domestic applications such as the Ford F-150, Ford Expedition, and Lincoln Navigator.

Key Features

• 12-volt ignition coil for distributorless COP systems
• COP (Coil on Plug) design for direct spark delivery
• Blade terminal type with 2 terminals
• Female connector gender and male terminal gender
• Oil-filled: No
• Developed and tested in an ISO 17025 accredited lab
• NGK Part Number 49171 / Stock Number 49171

Product Details

NGK COP Ignition Coil Multi-Pack, part number 49171, is designed for vehicles using OE black coil boots and distributorless ignition layouts. NGK builds these ignition coils with a focus on OE-level fit, durability, and stable operation under demanding conditions. The brand’s long history in ignition components and broad coverage across domestic and import vehicles makes this coil a practical replacement choice for service work on Ford, Lincoln, and Mercury platforms. This part cross-references Delphi GN10182 for the same application.

What It Helps Fix

• Engine misfire caused by a weak or failing ignition coil
• Rough idle during cold start or under load
• Hard starting related to inconsistent spark output
• Loss of power and hesitation during acceleration
• Check engine light conditions tied to ignition coil faults

Installation Notes

Verify connector style, terminal layout, and OE black coil boot application before installation. This coil is for distributorless COP systems and should be matched to the vehicle’s original ignition configuration. Confirm fitment for the exact year, make, and model before replacing the existing coil. Part number 49171 is listed for 2004-2008 Ford F-150, 2005-2007 Ford Expedition, 2005-2007 Ford Mustang, and related Ford, Lincoln, and Mercury applications.

Quality Assurance

NGK develops and tests ignition coils in an ISO 17025 accredited laboratory under extreme operating conditions to validate performance and durability. The brand’s OE-focused manufacturing and broad vehicle coverage support consistent replacement quality for service technicians and DIY repairs.