The TST 507 is a wireless tire pressure monitoring system you install yourself

The TST 507 is an aftermarket tire pressure monitoring system (TPMS) made by Tire Pressure Monitoring Systems Inc. It consists of four wireless sensors that screw onto your tire valve stems, a display unit that mounts inside your vehicle, and a receiver that plugs into your 12-volt power outlet. Unlike the factory TPMS built into most vehicles, the TST 507 lets you see real-time pressure and temperature for each tire on a screen you control, rather than just getting a warning light when pressure drops.

The system is designed for people who want more detailed tire information than their vehicle's built-in monitor provides — particularly useful if you tow, off-road, or adjust tire pressure frequently for different conditions. The wireless sensors communicate with the display unit from up to 100 feet away, so you can check your tire status without leaving the driver's seat.

Key Takeaways

  • The TST 507 includes four wireless sensors, a display screen, and a power receiver that you install yourself without special tools.
  • Each sensor shows individual tire pressure and temperature in real time, updated every few seconds.
  • The system works on most vehicles with standard tire valve stems and runs on a rechargeable battery in each sensor.
  • You can set custom pressure alerts for each tire, so you get notified if pressure drops below or rises above your target range.
  • The display screen mounts on your dashboard or windshield and connects to power through a 12-volt outlet.

What comes in the TST 507 box and what you need to install it

The TST 507 kit includes four tire sensors with metal valve stem caps, one display monitor, one power receiver unit, a 12-volt power cable, mounting hardware for the display, and an instruction manual. You do not need special tools — the sensors thread onto your existing valve stems by hand, and the display mounts with adhesive strips or a suction cup bracket.

Before you start, check that your vehicle has standard tire valve stems. If your tires use special locking valve stems or custom wheels with integrated sensors, the TST 507 may not fit. The system works on cars, trucks, RVs, and trailers, but confirm your valve stem type matches the sensor threads first. The power receiver plugs into any 12-volt outlet in your vehicle — typically the cigarette lighter socket or a USB power port.

How to set up the sensors and display screen

Start by removing your current valve stem caps and setting them aside. Screw each TST 507 sensor onto a tire valve stem by hand until snug — do not overtighten. The sensors are waterproof and designed to stay on permanently. Once all four sensors are installed, plug the power receiver into your 12-volt outlet and wait for it to power on.

Mount the display screen on your dashboard using the included adhesive strips or suction cup bracket. Position it where you can see it clearly without blocking your view of the road. The display will search for the four sensors automatically and pair with them within a few minutes. Once paired, the screen will show pressure and temperature readings for each tire. Most displays update every 3 to 5 seconds.

Setting pressure alerts and understanding the display

The TST 507 display lets you set a minimum and maximum pressure threshold for each tire. You enter these through the screen's menu — typically by pressing buttons on the display unit itself. When pressure drops below your minimum or rises above your maximum, the display alerts you with a beep and highlights the affected tire. This is useful if you lower tire pressure for off-roading and want to remember to raise it again, or if you want early warning of a slow leak.

The screen shows pressure in PSI (pounds per square inch) and temperature in Fahrenheit or Celsius, depending on your settings. Most displays also show battery level for each sensor so you know when a battery is running low. Some models include a maximum pressure reading — the highest pressure each tire reached since the last reset — which helps you spot pressure spikes from heat or overloading.

How long the sensor batteries last and when to replace them

Each TST 507 sensor contains a rechargeable lithium battery that typically lasts 3 to 5 years under normal use. Battery life depends on how often the sensors transmit data and the temperature where you park. Cold climates and frequent pressure changes drain batteries faster. The display screen will alert you when a sensor battery is low, usually giving you several weeks of warning before it dies completely.

When a battery runs out, you replace the entire sensor unit — you cannot open the sensor to swap just the battery. Replacement sensors are sold individually or in sets and cost less than a full system. You straightforward unscrew the old sensor and screw on the new one, then re-pair it to the display through the menu. The pairing process takes a minute or two and requires no tools.

Comparing the TST 507 to your vehicle's factory TPMS

Your vehicle's built-in TPMS monitors pressure in all four tires and lights up a dashboard warning when pressure drops about 25 percent below the recommended level. It does not show you individual tire pressures or temperatures — just a warning light. The TST 507 shows you exact pressure and temperature for each tire in real time and lets you set custom alert thresholds.

The factory system is passive: it only warns you when something is already wrong. The TST 507 is active: you can watch pressure change as you drive, see how temperature affects your tires, and catch slow leaks before they become dangerous. If you tow a trailer, the TST 507 can monitor trailer tire pressure separately, which your vehicle's factory system cannot do. The trade-off is that the TST 507 requires installation and battery maintenance, while the factory system is built in and maintenance-free.

Common issues and what to do if sensors stop working

If a sensor stops transmitting, the display will show a signal loss alert for that tire. First, check that the sensor is still screwed tightly onto the valve stem — vibration or a collision can loosen it. If it is loose, tighten it by hand. If the sensor is tight but still not transmitting, try removing it and reinstalling it, then re-pairing it to the display through the menu.

If re-pairing does not work, the sensor battery may be dead or the sensor itself may be damaged. Check the display to see if it shows a low battery warning for that sensor. If the battery is low, order a replacement sensor. If the display shows no battery warning but the sensor still will not pair, the sensor may have failed and needs replacement. Keep in mind that metal valve stem caps can interfere with the signal — if you use aftermarket caps, make sure they are not blocking the antenna on the sensor.

Frequently Asked Questions

Can I use the TST 507 on a trailer or RV?

Yes. The TST 507 works on trailers and RVs as long as the tires have standard valve stems. You install the sensors the same way and mount the display inside the vehicle or trailer. Some users install multiple displays — one for the tow vehicle and one for the trailer — so they can monitor all tires at once.

What happens if I get a flat tire while using the TST 507?

The display will show a sudden pressure drop and alert you when ready. The sensor will continue transmitting until the tire is completely flat, so you will have real-time confirmation of what is happening. The system does not repair the tire or call for help — it just tells you the pressure is dropping so you know to pull over safely.

Do I need to reprogram the sensors if I change vehicles?

The sensors themselves do not store vehicle information — they only transmit pressure and temperature. If you move the system to a different vehicle, you unscrew the sensors from the old tires, screw them onto the new tires, and the display will find them again. You may need to re-enter your pressure alert settings for the new vehicle if the recommended tire pressure is different.

Will the TST 507 work if my vehicle already has a factory TPMS?

Yes. The TST 507 is a separate system and does not interfere with your factory TPMS. Both systems can run at the same time. Your factory warning light will still work if pressure drops critically, and the TST 507 will show you detailed pressure data on its own display. Having both gives you redundancy — if one system fails, the other still monitors your tires.

Can I use the TST 507 on a motorcycle or bicycle?

The TST 507 is designed for four-tire vehicles and comes with four sensors. Motorcycles and bicycles would need a different system. Some tire pressure monitors are made specifically for motorcycles, but the TST 507 is not one of them.