Just went through this, I first went cheap on Ebay, they didn't work, reordered Denso from Rock Auto and problem solved. I did experience problems getting the old nuts off due to age/corrosion, so I removed the studs and replaced with stainless bolts.
I have a 2003 Toyota Tacoma DLK Crew Cab, auto with a 3.5 V6. I recently replaced the dash light bulbs. I disconnected the battery before starting this project. Everything went well until I got it all back together, the dash lights and gauges all work as they should however, when I put it in 4WD...