A quick heads up about this subject. My 2007 Nissan Frontier started throwing a warning light on the tire pressure light. Checked everything & aired up all tires and figured the light would go out after a few miles. Wrong! Every new vehicle made since 2007 has tire pressure sensors, mandated by federal law in the U.S. Not a bad thing to have, especially if you plan on pulling a trailer on the highway at speed.
The light would flash after starting the truck, then go to full-on after a minute or so of driving. I called the dealer & told them what was happening. They said it was "just" the tire sensor going bad, they last "about 10 years" or in my case, about 8 years. When I asked about the replacement cost, I was told it was $250 per wheel, or $1,000 plus tax. WTF? I was shocked. Their warranty on this part is for one year.
I called our local Discount Tire (just around the corner from our house, about 2 blocks for me to walk if necessary) and was told it would be $200. I asked if that was $200 a wheel & they said, no $200 plus tax, or a total of $216.20 out the door. This included dismounting the tires, replacing the sensors (valve stem is the location), remounting tires & balancing, then replacing them on the truck. I did it on Saturday morning, they finished early, since I was able to drop off the truck at 08:00 when they opened. All is well.
Just saying, don't go to the dealership if you need a "regular" repair, they will rip you off.