NGK ILFR6T11 Laser Iridium Spark Plug

The ILFR6T11 (NGK part 4904) is the OE-equivalent for Toyota applications using the 1GR-FE 4.0L V6 engine, including the 2005·2015 Toyota Tacoma 4.0L V6, Toyota 4Runner (2003·2009 and later), Toyota Tundra, and Toyota FJ Cruiser, as well as select Lexus V8 applications. It cross-references to Toyota OEM part 90919-01191 (confirmed in NGK specification data). Always verify against the NGK application guide for your specific year, make, model, and engine before purchasing · the product listing's fitment table has contained errors for non-Toyota applications.

Yes · the ILFR6T11 ships pre-gapped from NGK. Owners confirm the plugs can be installed without gap adjustment for Toyota 4.0L V6 applications. Some owners report a minor variance (~0.002") from spec; if precision is important, verify the gap with a feeler gauge before installation using a coin-style gauge carefully to avoid bending the fine iridium tip.

These are two different plugs. The ILFR6T11 (NGK part 4904) has a 26.5mm thread reach and NGK heat range 6, and is the OE-equivalent for Toyota 4.0L V6 (1GR-FE) engines. The IFR5T11 (NGK part 4996) has a 19mm thread reach and heat range 5, and is specified for smaller-displacement engines. Installing the wrong reach can cause engine damage · always confirm the correct part number from the NGK application guide.

NGK rates the ILFR6T11 for 100,000 miles. Owners commonly reference the 100,000-mile rating when describing their purchase for Tacoma and 4Runner V6 applications. Community removal-photo evidence at the full rated interval has not been located in our research; the rating is consistent with the iridium fine-wire center electrode and platinum ground geometry.

The Amazon listing for NGK ILFR6T11 Laser Iridium Spark Plug carries a California Prop 65 warning. California requires this warning on a very wide range of manufactured goods — including rubber, vinyl, plastic, and metal automotive parts — whenever trace exposure to any of roughly 900 listed substances (commonly phthalates or heavy metals) is possible, regardless of whether the specific product poses a meaningful health risk. As a passive accessory, NGK ILFR6T11 Laser Iridium Spark Plug has no Safety Data Sheet, so there's no chemistry breakdown to translate beyond that.