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Tire Pressure Monitoring Systems (TPMS) are essential safety features in modern vehicles, designed to alert drivers when tire pressure falls below recommended levels. There are two main types of TPMS sensors: direct and indirect. Understanding how these sensors work and when they need to be replaced is crucial for maintaining vehicle safety and performance.

Types of TPMS Sensors

1. Direct TPMS Sensors

• These sensors are mounted directly on the tire's valve stem and measure the actual tire pressure. They transmit real-time data to the vehicle’s onboard computer, providing accurate readings.
• Direct sensors typically have a battery life of 5 to 10 years, depending on usage and environmental factors. When they fail, they may send incorrect pressure readings or no readings at all.

2. Indirect TPMS Sensors

• Indirect sensors don't measure tire pressure directly. Instead, they rely on the vehicle’s Anti-lock Braking System (ABS) to monitor wheel speed. If a tire is under-inflated, it will rotate at a different speed than the properly inflated tires, triggering a warning.
• While indirect systems don't have tire sensors with batteries that need replacement, the system can become less reliable if there are issues with the ABS wheel sensors or if the vehicle's software malfunctions.

Signs that My Direct TPMS isn't Working Correctly

You may be time to replace the TPMS sensors if you notice the following:

• Warning light on the dashboard remains illuminated despite tire pressure levels being correct.
• Inconsistent or incorrect tire pressure readings displayed.
• TPMS warning light blinks intermittently.
• Sensor error messages appear on the vehicle's display.
• Delayed or no response to changes in tire pressure.
• Physical inspection reveals damaged or corroded sensors.

Direct TPMS sensors typically need to be replaced every 5 to 10 years, or whenever the battery within the sensor fails.

Signs an Indirect TPMS isn't Working Correctly

An indirect TPMS doesn't have sensors on each tire like a direct system. However, issues can still occur related to the anti-lock braking system and other parts that result in the system not working optimally. Issues you might experience include:

• The tire pressure warning light remains illuminated on the dashboard despite tire pressure levels being correct.
• Frequent or random alerts about low tire pressure despite normal conditions.
• Inability to detect a flat tire promptly.

If you're experiencing issues related to your tire warning light or tire pressure levels, we encourage you to contact your nearest Heartland Tire location. We provide a variety of tire services at locations across Minnesota and Iowa, including TPMS services and tire repair. We're also your source for a comprehensive selection of replacement tires for passenger vehicles, alongside many other types of vehicles and equipment.

Whether you need replacement sensors for a direct TPMS or help troubleshooting issues with an indirect TPMS, the team at Heartland Tire is ready to assist you. Count on us to keep you rolling!