LFR5AIX-11 Spark Plugs (6-Pack) - Platinum, Interchange 4469 / ILFR5B11 / PLFR5A11 for Nissan, Infiniti & Hyundai

If your engine has started idling rough, hesitating when you accelerate, or throwing a misfire code, worn plugs are the first thing worth checking. This is a set of six LFR5AIX-11 spark plugs, the platinum-tip plug that cross-references to the 4469, ILFR5B11 and PLFR5A11 numbers used across a lot of Nissan, Infiniti and Hyundai gasoline engines. One box covers a full V6, so you can swap the whole set in one go.

We sell a lot of ignition auto parts, and plugs are one of the easiest wins on an older engine. A fresh set brings back a stable spark, smooths out the idle and takes load off the ignition coils, which tend to fail early when they're forced to fire across worn-out gaps.

Why Choose These LFR5AIX-11 Spark Plugs

The platinum tip on the center electrode wears much more slowly than a plain nickel plug, so the gap stays close to spec for a long time. That means a steady spark, smoother running and fewer trips under the hood. These are a direct replacement for the original interchange numbers, with the same thread, reach and heat range, so there's nothing to modify.

Not sure your plugs are the problem? Our guide to bad spark plug symptoms walks through the warning signs, how to read an old plug and how to tell a plug problem from a bad coil.

Specifications

• Type: Platinum spark plug
• Quantity: 6 plugs per pack
• Interchange numbers: LFR5AIX-11, LFR5AIX11, 4469, ILFR5B11, PLFR5A11
• Manufacturer part number: A0283A0011
• Fuel type: Gasoline
• Fitment type: Direct replacement
• Listed fitment: Nissan Quest 2004-2009, Nissan Titan 2004-2008, Nissan Sentra 2002-2006
• Condition: New
• Warranty: 1 year

Check Fitment Before You Order

The interchange number is the most reliable way to match a plug. Pull one of your old plugs and compare the number printed on the insulator, or check your owner's manual. Keep your cylinder count in mind as well: this pack has six plugs, which suits V6 engines. A V8 needs eight, and a four-cylinder needs four. If you want us to double-check, send your VIN through our contact page and we'll confirm the fit.

Installation Tips

• Only change plugs on a cool engine, especially with aluminum cylinder heads.
• Check the gap before installing, and never pry on the fine center electrode.
• Thread each plug in by hand first, then tighten to the torque spec for your engine.
• Look at the coil boots while you're in there. A cracked or oil-soaked boot will cause misfires even with new plugs.
• Replace all six at the same time so every cylinder fires evenly.

Need a coil too? Browse our electrical parts, or check out the iridium 22401-5M015 plug set if you'd prefer an iridium upgrade for a Nissan VQ engine. More engine auto parts are in our engine parts collection and the Nissan section.

Shipping and Warranty

We ship to customers worldwide. Delivery estimates are on our shipping page, and you can follow your order on the tracking page. Warranty details are on our warranty page. For background on how plugs work and what heat range means, Wikipedia's spark plug article is a solid read.

Bottom line: if your interchange number is LFR5AIX-11, 4469, ILFR5B11 or PLFR5A11, these LFR5AIX-11 spark plugs are a straight swap that brings back a clean, steady spark at a fair price.