The Ultimate Guide: How to Sync TPMS Sensors on Subaru WRX

Are you experiencing tire pressure warning lights on your Subaru WRX? It could be a sign that your TPMS (Tire Pressure Monitoring System) sensors need to be re-synchronized. Learning how to sync TPMS sensors Subaru WRX is a valuable skill for any WRX owner, allowing you to address this issue yourself and maintain optimal tire pressure. This guide will walk you through the process, providing clear instructions and helpful tips.

Understanding TPMS Sensors

TPMS sensors are small devices mounted inside your tires that constantly monitor tire pressure. They transmit this data wirelessly to your car’s computer, which then displays it on the dashboard. If the pressure falls below a certain threshold, the system triggers a warning light, alerting you to a potential problem.

Why Do TPMS Sensors Need Synchronization?

TPMS sensors need to be synchronized with your car’s computer to function properly. This process establishes communication between the sensors and the vehicle’s system. Synchronization is necessary in several situations:

• After replacing a tire: When you replace a tire, the new tire will have a new sensor that needs to be paired with your car’s computer.
• After battery replacement: TPMS sensors have internal batteries that eventually need to be replaced. Once a new battery is installed, synchronization is required.
• After a sensor malfunction: If a sensor malfunctions, it may need to be replaced. The new sensor will need to be synchronized with the system.
• After a tire rotation: While not always necessary, some Subaru models may require re-synchronization after tire rotations.

Methods for Syncing TPMS Sensors Subaru WRX

There are two primary methods for synchronizing TPMS sensors on a Subaru WRX:

1. Using the Subaru Diagnostic Tool:

This method involves using the Subaru diagnostic tool, which is available at most Subaru dealerships and some independent repair shops. The process typically involves:

• Connecting the tool: The technician will connect the diagnostic tool to your car’s OBD-II port.
• Accessing the TPMS module: The technician will navigate the tool’s menus to access the TPMS module.
• Initiating the synchronization process: The technician will initiate the synchronization process, which typically involves following on-screen prompts.
• Confirming the synchronization: The technician will verify that all sensors are successfully synchronized.

2. Using the Vehicle’s Built-In Relearn Procedure:

Some Subaru WRX models allow you to synchronize TPMS sensors using a built-in relearn procedure. This method is typically performed as follows:

• Locate the relearn button: The relearn button is usually located near the steering wheel or on the dashboard.
• Turn the ignition key to the “ON” position: Do not start the engine.
• Press and hold the relearn button: Hold the button for a specified amount of time, typically 10-15 seconds.
• Start the engine: The vehicle will then enter relearn mode.
• Drive the vehicle: Drive the vehicle at a speed of approximately 20 mph for a few minutes.
• Complete the procedure: The relearn procedure will automatically complete once the sensors are successfully synchronized.

Step-by-Step Guide to Synchronizing TPMS Sensors on a Subaru WRX

1. Gather the Necessary Tools:

• Subaru diagnostic tool (if using the dealer method)
• Tire pressure gauge
• Inflatable tire pressure gauge (optional)

2. Check Tire Pressure:

Before you begin the synchronization process, ensure that all tires are inflated to the correct pressure as indicated on the driver’s side door jamb sticker or your owner’s manual.

3. Choose Your Synchronization Method:

Decide whether you want to use the dealer method or the vehicle’s built-in relearn procedure.

4. Follow the Appropriate Method:

• Dealer Method: Visit your local Subaru dealership or a qualified repair shop and ask them to synchronize your TPMS sensors.
• Vehicle’s Built-in Relearn Procedure: Consult your owner’s manual for specific instructions on how to perform the relearn procedure for your Subaru WRX model.

5. Verify Synchronization:

After completing the synchronization process, start the engine and check the dashboard for any tire pressure warnings. If no warning lights are displayed, the sensors are successfully synchronized.

Troubleshooting Tips

• Ensure the battery in your sensor is working properly. If the battery is dead, the sensor won’t be able to communicate with the vehicle.
• Check for any obstructions that may be blocking the sensor’s signal. This could include debris, mud, or even a damaged sensor.
• Verify that all sensors are properly installed and secure. If a sensor is loose, it may not be able to transmit data correctly.

Maintaining Your TPMS Sensors

• Check tire pressure regularly: It’s essential to check your tire pressure at least once a month, especially before long trips.
• Replace batteries as needed: TPMS sensors have internal batteries that typically last 5-7 years. If you notice a warning light that doesn’t go away, even after adjusting tire pressure, the battery in your sensor may need to be replaced.
• Keep your sensors clean: Clean your sensors regularly with a soft cloth and mild soap to prevent dirt and debris from accumulating.

Final Thoughts: Beyond the Wheel

Synchronizing your TPMS sensors is a crucial step in maintaining the safety and performance of your Subaru WRX. By understanding the process and following the instructions outlined in this guide, you can ensure that your tire pressure monitoring system is working properly, allowing you to drive with confidence.

Remember, regular maintenance and attention to your TPMS sensors will help you avoid potential issues and ensure a smooth and enjoyable driving experience.

What You Need to Know

Q: How long does it take to sync TPMS sensors on a Subaru WRX?

A: The synchronization process usually takes a few minutes, depending on the method used. The dealer method may take slightly longer due to the diagnostic tool setup.

Q: How much does it cost to sync TPMS sensors at a Subaru dealership?

A: The cost of synchronizing TPMS sensors at a Subaru dealership can vary depending on location and labor rates. Expect to pay between $50 and $100 for the service.

Q: Can I sync TPMS sensors myself without a diagnostic tool?

A: Some Subaru WRX models allow you to sync TPMS sensors using a built-in relearn procedure. However, if your vehicle does not have this feature, you will need to use a diagnostic tool, which is typically available at dealerships or repair shops.

Q: What happens if I don’t sync my TPMS sensors?

A: If you don’t sync your TPMS sensors after replacing a tire or battery, the system won‘t be able to accurately monitor tire pressure. This could lead to a false warning light or, more importantly, a potentially dangerous situation if you’re driving with low tire pressure.