NGK
Laser Iridium Spark Plug

NGK 97177 Spark Plug

Brand NGK 97177
Resistance 5000
Ground Electrode Tip Design Standard
Ground Configuration Standard
Ground Electrode Core Material Nickel
Electrical Terminal Type Non-removable nut
Center Electrode Core Material Copper
Center Electrode Tip Material Iridium
Pre-Gap Size .032
Ground Electrode Quantity 1
Hex Size 5/8
Insulator Height 53.00
Manufacturer Heat Range 6
Seat Type Tapered
Reach 25.00
Thread Diameter 14.00
Part Number Ltr6ci-8
Stock Number 97177
Product line Laser Iridium Spark Plug
Fits Ford and Lincoln · 95 vehicles

OE-equivalent design. Built for original-equipment-style ignition service and consistent performance.

Laser iridium tip. Supports precise spark delivery with durable electrode construction.

Pre-gapped at 0.032 inch. Ready for listed applications with a tapered-seat fit.

Cross-references AMS Automotive 4719, Anchor 9016 and Anchor 9697 for the same application. See all 19.

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Laser Iridium Spark Plug Overview

The NGK 97177 is a laser iridium spark plug built for OE-style service in a wide range of Ford and Lincoln applications. It uses an iridium center electrode, copper core, and a tapered seat to support consistent ignition performance and long service intervals.

Compatible With Ford Explorer, Ford F-150, Ford Flex, Ford Taurus, Ford Transit-150, Ford Transit-250, Ford Transit-350, Ford Transit-350 HD, Ford Expedition, Lincoln MKT, Lincoln Navigator, and Lincoln MKS applications listed below. The NGK 97177 is also referenced by part number LTR6CI-8.

Key Features

  • Laser iridium center electrode for precise spark delivery.
  • Copper core construction for stable heat transfer.
  • Standard nickel ground electrode with a single ground configuration.
  • Pre-gapped to 0.032 inch for listed applications.
  • Tapered seat design with a 14 mm thread diameter and 5/8 inch hex.
  • 5000 ohm resistance and non-removable nut terminal.

Detailed Description

NGK 97177 is engineered as an OE-equivalent spark plug for modern Ford and Lincoln engines that call for a laser iridium design. The combination of an iridium center electrode, copper core, and standard ground electrode layout supports reliable combustion and steady performance under normal driving and severe-service intervals. This part number, 97177, is listed for multiple Ford Explorer and Ford F-150 model years, along with Flex, Taurus, Transit van, Expedition, and Lincoln MKT, Navigator, and MKS applications.

NGK’s OE supplier background and long automotive manufacturing history make this spark plug a direct choice for buyers seeking original-equipment-style ignition service. Part number 97177 and NGK 97177 both identify the same spark plug in this catalog.

What It Is Used For

  • Restoring weak or inconsistent spark output.
  • Addressing misfire concerns tied to worn plugs.
  • Replacing plugs that no longer hold the specified gap.
  • Supporting smoother idle and throttle response in listed Ford and Lincoln engines.
  • Maintaining ignition service intervals specified for the application.

Installation Notes and Tips

Verify the engine application and service interval before installation. Confirm the specified 0.032 inch gap for the listed fitments and inspect the seat type, thread diameter, and reach against the original plug before fitting. Use proper spark plug service procedures to avoid thread damage and ensure correct torque.

Quality Assurance

NGK is a major OE supplier of spark plugs in North America and manufactures ignition components to original-equipment standards. The 97177 reflects that OE-focused approach with materials and construction selected for durability and consistent operation.

This part fits 95 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersNotes
2019FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordTransit-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordTransit-2503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordTransit-3503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019FordTransit-350 HD3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2019LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordExpedition3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 90,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordTransit-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordTransit-2503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordTransit-3503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018FordTransit-350 HD3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2018LincolnNavigator3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordExpedition3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 90,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017FordTransit-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017FordTransit-2503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017FordTransit-3503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017FordTransit-350 HD3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2017LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2017LincolnNavigator3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016FordExpedition3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016FordTransit-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordTransit-2503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordTransit-3503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016FordTransit-350 HD3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2016LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2016LincolnNavigator3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015FordExpedition3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015FordTransit-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordTransit-2503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordTransit-3503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015FordTransit-350 HD3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2015LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2015LincolnNavigator3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2014FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2014FordPolice Interceptor Utility3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi (Severe) / 100,000 mi (Normal) OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2014LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2013FordExplorer3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2013FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2013FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2013FordPolice Interceptor Sedan3.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2013FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2013LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2013LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2012FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2012FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2012FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2012LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2012LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2011FordF-1503.5LV6Gap 0.032"; OE Equivalent Design*; 60,000 mi OE Mfr Recommended Service Interval-Severe Service, 100,000 mi OE Mfr Recommended Service Interval-Normal Service; Laser Iridium Spark Plug
2011FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2011FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2011LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2011LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 100,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2010FordFlex3.5LV6Gap 0.032"; OE Equivalent Design*; 90,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2010FordTaurus3.5LV6Gap 0.032"; OE Equivalent Design*; 90,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2010LincolnMKS3.5LV6Gap 0.032"; OE Equivalent Design*; 90,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
2010LincolnMKT3.5LV6Gap 0.032"; OE Equivalent Design*; 90,000 mi OE Mfr Recommended Service Interval; Laser Iridium Spark Plug
Directly replaces or cross-references 19 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AMS Automotive — 4719Anchor — 9016Anchor — 9697Anchor — 9731NGK — 97177AI5863BL3E-12405-CABL3E-12405-DABL3E-12405-DBBL3E 12405 CABL3E12405CACYFS12Y3CYFS12YT3CYFS12YT4ITV20TTSP512ASP528SP534SP580