NGK Laser Iridium Spark Plug LZFR5CI-11 (92145) 4-Pack — Iridium Tip, Pre-Gapped OEM Fit

NGK LZFR5CI-11 Laser Iridium Spark Plug (92145) is a genuine four-pack of high-precision replacement spark plugs designed to restore and maintain reliable ignition for compatible gasoline engines.

These NGK Laser Iridium plugs are OEM-grade ignition components built to factory tolerances and supplied in original packaging. The iridium-tipped center electrode provides a fine, hard-wearing firing point that helps ensure consistent spark performance across a wide range of operating conditions. This listing includes four identical plugs, all labeled NGK 92145, intended as direct replacements for vehicles specifying the LZFR5CI-11 part number.

What makes NGK Laser Iridium 92145 different from standard spark plugs?

Laser Iridium plugs use a very thin iridium center electrode, which maintains a stable spark gap longer than conventional designs. That leads to more consistent ignition characteristics over the plug’s service life without changing your vehicle’s ignition system or settings.

• Iridium center electrode for durable spark performance
• Manufacturer-specified dimensions for direct fit
• Matched four-pack to service multiple cylinders or have a spare

How do I confirm these are the right plugs for my vehicle?

Verify fitment by checking your vehicle’s owner manual, the original part number, or using the retailer’s vehicle fitment tool (such as Amazon Confirmed Fit). NGK part numbers and cross-references are also available on the NGK website to match threads, reach, and heat range.

• Compare LZFR5CI-11 or 92145 with your current plug stamping
• Use the online fitment lookup or OEM parts list for confirmation
• Contact NGK customer support if you’re unsure about compatibility

What should I expect when installing these NGK spark plugs?

Installation is straightforward for anyone familiar with basic engine maintenance: remove the old plugs, inspect the threads and cylinder head, and install the new NGK pieces to the recommended torque. Always follow the vehicle manufacturer’s torque and gap specifications; these plugs are supplied pre-gapped to factory settings but may require final adjustment for some applications.

• Pre-gapped by NGK to typical OEM specs
• Install using a proper torque wrench to avoid over-tightening
• Replace ignition boots or coils as needed for best results

How long can I expect these spark plugs to last?

Iridium electrodes generally offer longer service life than copper or standard nickel plugs due to the metal’s hardness and resistance to erosion. Actual lifespan depends on driving conditions, engine tuning, and maintenance habits, but many iridium plugs are designed to perform reliably for tens of thousands of miles under normal use.

• Extended electrode life from iridium construction
• Consistent spark gap retention over time
• Performance influenced by engine condition and driving patterns

Who is this for: This four-pack of NGK Laser Iridium 92145 (LZFR5CI-11) plugs is for vehicle owners, DIY mechanics, and professional technicians seeking genuine OEM-quality replacements. Choose this product if your vehicle specifies the LZFR5CI-11 part, you want longer-lasting spark plug performance than standard plugs, or you need a matched set to service multiple cylinders. Always confirm fitment for your specific engine before purchasing to ensure correct thread size, reach, and heat range.