Spare Tire Pressure Monitoring System TPMS how to Sync

[LuvOrH8]

I tried searching this, but didn't find anything. I bought a spare tire for my cybertruck. It has the factory OEM tire pressure monitoring system/gauge. How do I sync it to my truck as a 5th tire/spare? Is that even possible? If not what if when and if I ever go to use it, how does it sync then? I figure, given that Tesla sells a 5th tire spare kit with the monitor, there must be a way to sync it as a 5th wheel spare? Thanks for any help and suggestions on this.

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[wtibbit]

I just had my spare tire kit installed at the service center, and had the same question. During the drive home I brought up the screen that shows the tires' pressure and there was (and still is) no spare tire shown on the display.

The next day I rotated the tires, including the new spare in the rotation, and put the spare on the rear passenger-side axle. The tire that had been on the front driver-side was put back in the vault as the spare.. On the way home I check the tire pressure display and saw all four tires were being monitored. The rear passenger-side tire's pressure, the new (spare) tire, was 3 psi higher than the other three. When I got home I confirmed the pressure difference with a tire gauge. This proved that the truck correctly synced up to the TPS sensor in the new tire.

I'm just guessing, but I think there is a TPS receiver at each tire location that detects that tire's TPS sensor signal and there is no sensor for the spare.

 

[LuvOrH8]

Correct no way to monitor spare tire pressure has been confirmed.

 

[HaulingAss]

I'm just guessing, but I think there is a TPS receiver at each tire location that detects that tire's TPS sensor signal and there is no sensor for the spare.

The spare tire doesn't transmit a TPMS signal because it's not rotating. This means the battery in your spare tire will last even longer than your tires in use. Only rotating tires transmit a pressure.

 

[AlmostHuman]

What HaulingAss said. TPMS sensors normally don’t kick on until around 25 mph (for most brands). There are sensors on the Teslas that will understand where the TPMS unit is and register it with the system. At most you might have to do a TPMS reset but likely not required.

 

[wtibbit]

The spare tire doesn't transmit a TPMS signal because it's not rotating. This means the battery in your spare tire will last even longer than your tires in use. Only rotating tires transmit a pressure.

Good to know!

I'm treating my spare as part of the full set of road wheels, keeping all five wheels in the rotation pattern, so the new "spare" tire should see about the same mileage, over time, as the other four.

I'll rarely have a spare in the truck, it just uses too much space and weighs a good bit, too. I will put it in for long trips. I've already had to have a puncture repaired and wouldn't want to depend on a temporary plug when traveling.

That thing looks even bigger off the truck and I sure don't want to have it using up floor space in the garage. I'll probably wrap it up in UV-proof material and store it behind the house.

 

[Jack27]

Buy a tire pressure gage, 99.9% of the time it works every time

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