NGK 4919 Spark Plug - Intake Side

NGK Iridium IX Spark Plug 4919 Overview

NGK Iridium IX Spark Plug 4919 is built for drivers maintaining older Honda, Toyota, Lexus, Acura, Nissan, Mazda, and Saab applications that call for a 14 mm, flat-seat plug with a .044 inch pre-gap. The iridium center electrode, copper core, and nickel ground electrode support stable ignition performance in a wide range of import and domestic engines.

Part number 4919 is also identified as BCPR6EIX-11 and is part of NGK’s Iridium IX spark plug line, which focuses on fine-wire iridium construction for consistent spark delivery and dependable service in everyday driving conditions.

Key Features

• Iridium center electrode tip material for precise spark delivery
• Copper center electrode core for efficient heat transfer
• Nickel ground electrode core with standard single-ground configuration
• Taper-cut ground electrode tip design
• 5000 ohm resistance
• Pre-gapped to .044 inch
• 14 mm thread diameter, .75 inch reach, flat seat
• 5/8 inch hex size for standard spark plug service tools
• Manufacturer heat range 6

Product Details

NGK 4919 is an Iridium IX spark plug engineered for vehicles that specify a flat-seat, 14 mm plug with a .044 inch gap. The iridium tip helps maintain a consistent firing point, while the copper core supports heat dissipation and the nickel ground electrode provides a conventional single-ground design. This combination makes the plug a direct service choice for many older applications, including select Honda Civic, Honda CRX, Toyota Camry, Lexus ES300, and Nissan 300ZX fitments.

Compatible With 1988-1991 Honda Civic, 1988-1991 Honda CRX, 1988-1993 Toyota Camry, and 1992-1993 Lexus ES300 applications that call for NGK BCPR6EIX-11. It also appears in fitment for Saab 9-5, Saab 9-3, and Saab 9000 models, along with additional Acura, Mazda, Nissan, and Toyota applications listed in the vehicle coverage.

This part cross-references Monroe Shocks & Struts (e.g., 5602) for the same application.

Common Issues This Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent ignition firing
• Misfire conditions related to aged plug electrodes
• Reduced throttle response from weak spark delivery
• Maintenance replacement for vehicles calling for NGK 4919

Installation Notes and Tips

• Verify the vehicle’s required plug specification before installation.
• Check and confirm the gap against the engine’s service specification; listed fitments note .039 inch or .044 inch requirements depending on application.
• Use the correct 5/8 inch spark plug socket and tighten to the manufacturer’s torque specification.
• Inspect ignition wires or coil-on-plug components during service to avoid repeat misfire concerns.
• For dual-plug applications such as certain Nissan 200SX listings, confirm the correct intake-side or exhaust-side position before ordering.

Quality Assurance

NGK is a long-established OE spark plug supplier with North American manufacturing, inventory, and distribution support. The brand’s OE-focused production standards and broad vehicle coverage make NGK 4919 a dependable service part for maintenance on older import applications.