2004 Toyota Land Cruiser — windshield replacement created a highway whistle

I wouldn't throw parts yet. Move a coil or plug on the 2004 Toyota Land Cruiser if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. Write the result down so the next test isn't a repeat of the last one. Your commute and mine probably aren't the same, but the test still applies. Might be overthinking it, but I'd rather overthink than overspend.