NGK 3177 Spark Plug

NGK V-Power Spark Plug for OE-Style Ignition

NGK 3177 is a V-Power spark plug built for stable ignition performance in select Jaguar applications. It uses a copper center electrode, nickel center and ground electrode tips, a 5,000 ohm resistor, and a tapered seat to match OE-style secondary ignition requirements.

The V-Power spark plug line is designed around NGK’s long OE supply background and focuses on consistent combustion, reliable starting, and dependable service life in everyday driving. This part number is also identified as BR6EF.

Key Features

• NGK V-Power Spark Plug, part number 3177
• Copper center electrode core material for efficient spark delivery
• Nickel center and ground electrode tip materials
• 5,000 ohm resistor for ignition noise suppression
• Standard ground configuration with one ground electrode
• Pre-gapped to .028 inch
• Tapered seat, 14 mm thread diameter, 5/8 inch hex
• Heat range 6 with .708 inch reach

Detailed Description

NGK 3177 is a direct-fit style spark plug for select Jaguar XJ12, XJS, and XJRS models. It is engineered with a copper core and nickel firing surfaces to support consistent spark transfer, while the resistor design helps reduce electrical interference in the ignition system. For shoppers searching for a Jaguar XJ12 spark plug, Jaguar XJS spark plug, or Jaguar XJRS spark plug, this NGK V-Power option provides an OE-equivalent design approach.

This part cross-references 1765307 and R44LT for the same application.

What It Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to aged secondary ignition components
• Reduced throttle response from weak spark delivery
• Electrical interference in the ignition circuit

Installation Notes and Tips

Verify the tapered-seat design, 14 mm thread size, .708 inch reach, and .028 inch pre-gap before installation. For fitment reference, this part fits 1994-1996 Jaguar XJ12, N/A; fits 1994-1995 Jaguar XJS, N/A; and fits 1993 Jaguar XJRS, N/A. Always confirm the vehicle’s original plug specification and service interval requirements before replacing spark plugs on Jaguar XJ12, Jaguar XJS, or Jaguar XJRS applications.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with extensive coverage across automotive applications. Part number 3177 is produced to support original-equipment-style durability and operational performance standards.