HENGCOOL Ignition Coil & Iridium Spark Plug Kit for Ford 3.5L V6 — UF553 OEM-Style Direct Replacement

HENGCOOL UF553 is a complete ignition coil and iridium spark plug replacement kit engineered to restore reliable spark delivery for a range of Ford and compatible V6 3.5L and 3.7L engines.

This kit pairs high-quality ignition coils manufactured to OEM-style specifications with precision-gapped iridium spark plugs, offering a direct-replacement option for many Ford, Lincoln, Mercury and selected Mazda applications. The components are tested for thermal, vibration, and humidity resistance and are intended for naturally aspirated (non-EcoBoost) V6 engines where the listed part numbers match. Before ordering, verify fitment against your vehicle year, engine size, and original equipment part numbers.

Which vehicles and part numbers does this HENGCOOL kit fit?

The kit supports a broad set of naturally aspirated Ford V6 models and some Lincoln, Mercury and Mazda vehicles. It replaces several common OE and aftermarket reference numbers, so cross-checking your current part number is recommended to ensure exact compatibility.

• Compatible engines: Ford V6 3.5L and select 3.7L applications (non-turbo).
• Common models covered: Edge, Explorer, F-150 (XL/XLT), Flex, Fusion, Taurus, Police Interceptor, Lincoln MKZ/MKS/MKT/MKX and select Mazda 6 years.
• Replaces: UF553, UF-553, UF595 and many OE numbers including 7T4Z-12029-DA/E, CY0118100 variants and others listed.
• Not compatible with EcoBoost (turbocharged) engines.

What are the technical specifications and plug details?

The ignition coils use a two-pin connector and are manufactured to meet OE electrical and thermal tolerances. The iridium spark plugs come preset to a precise gap and sized to match factory threads and hex sizes for easy installation with standard tools.

• Ignition coil connector: 2-pin design compatible with listed OEM harnesses.
• Spark plug thread: 14 mm; heat range: 6; preset gap approximately 0.044 in (1.1 mm).
• Plug hex size: 16 mm (5/8 in) for standard socket removal and torque.
• Materials: corrosion-resistant coil housings and iridium tips for consistent spark.

How will these coils and plugs affect drivability and maintenance?

Replacing worn coils and fouled plugs with matched components helps restore consistent combustion and smooth idle. While results vary with vehicle condition, fresh ignition parts typically reduce misfires and can improve throttle response and fuel burn stability when installed correctly.

• Goal: quicker, more reliable ignition across all cylinders for steady idle and acceleration.
• Designed to resist heat, vibration, and humidity for long-term durability.
• Installation is straightforward—direct-fit replacements using factory connectors and mounting points.
• May contribute to improved fuel efficiency and lower exhaust irregularities when replacing degraded units.

What should I check before purchasing or installing this kit?

Confirm that your vehicle uses naturally aspirated 3.5L or supported 3.7L V6 engines and that the OE part numbers match one of the listed replacements. If unsure, consult your vehicle’s service manual or enter your VIN in a parts-lookup tool for a fitment check.

• Verify engine displacement and model year against the compatibility list.
• Cross-reference your current coil and plug part numbers with the kit’s replaceable numbers.
• Ensure the vehicle is not an EcoBoost/turbocharged variant.
• Have basic hand tools and torque wrench ready for correct plug installation torque.

Who is this for: This HENGCOOL UF553 coil and iridium spark plug kit is intended for DIY mechanics, professional technicians, and vehicle owners aiming to replace multiple ignition components at once on naturally aspirated Ford V6 engines (and compatible Lincoln, Mercury, Mazda applications). It’s best for those who want an OEM-style, drop-in replacement to restore ignition reliability and avoid diagnostic repeat visits due to worn coils or plugs.