2021 BMW X4 Tire Pressure Warning Light Stays On

Troubleshooting the Persistent Tire Pressure Warning Light in Your 2021 BMW X4: Causes and Solutions

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Tire Leaking Air
0%
30% chance it's the
Wheel Leaking Air
0%
15% chance it's the
Tire Pressure Monitoring System
0%
15% chance it's
Something else
The most common reasons a 2021 BMW X4 tire pressure warning light stays on are a leaking tire, a wheel that no longer holds air, or a faulty tire pressure monitoring system.
  • Tire Leaking Air: A puncture, valve stem issue, or rim damage can cause a tire to leak air, leading to loss of pressure.
  • Wheel Leaking Air: A puncture or damage to the tire or rim can cause air to leak, resulting in a loss of tire pressure.
  • Tire Pressure Monitoring System: A malfunctioning tire pressure monitoring system can be caused by faulty sensors or a dead battery in the sensor units.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2021 BMW X4 tire pressure warning light stays on?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When a tire pressure monitoring sensor fails, the tire pressure monitoring system control module will recognize a loss in communication and turn on the warning lamp which indicates the failure. This is most often the case. However, the tire pressure monitoring sensor may also fail by reporting incorrect tire pressures. This could cause a flat tire to go unrecognized, or a properly inflated tire to signal a low or high tire pressure warning.

When a relearn is needed, for any reason, the TPMS warning light will illuminate, and many vehicles will display a message relating to the TPMS system being inoperative or loosing communication. It is important to keep a watchful eye on tire pressures when this system is having issues because there is no warning available for underinflation or overinflation of the tires.

Wheels offer very few symptoms, but these symptoms should never be ignored. Visible cracks on the wheels may appear, especially after hitting a large bump, Most often, this will also be accompanied by loss of air from the tire on that wheel. Also, vibration in the steering wheel is very common when the tire is out of balance, and improper wheel nuts or bolts can cause creaking and popping noises to develop. Again, there are very few symptoms, but they should not be ignored.

The only symptoms requiring diagnosis for the tire pressure monitoring system warning lamp is if the warning lamp has illuminated while the tires have correct air pressure, or if the air pressure for the tires is out of specification and the warning lamp is off. This is because the overwhelming majority of cases where the TPMS lamp illuminates is due to the change in ambient temperature.

What steps should I take to diagnose the tire pressure warning light issue in my 2021 BMW X4?

To effectively diagnose the tire pressure warning light issue in your 2021 BMW X4, begin with a straightforward approach that prioritizes simple solutions before delving into more complex diagnostics. Start by checking the tire pressure in all four tires using a reliable tire pressure gauge, ensuring that each tire is inflated to the manufacturer's recommended levels, which can typically be found in your owner's manual or on a sticker located inside the driver's door jamb. Next, conduct a thorough visual inspection of each tire for any signs of damage, such as punctures, cuts, or bulges, as these can lead to pressure loss and trigger the warning light. Additionally, look for potential leaks by examining the tires and valve stems closely; a mixture of soap and water can be useful here, as bubbles will form at the site of any escaping air. If you have corrected the tire pressure but the warning light remains illuminated, consult your vehicle's manual for instructions on how to reset the tire pressure monitoring system (TPMS). Should the issue persist despite these efforts, it may be prudent to seek assistance from a qualified mechanic or a BMW dealership for a comprehensive inspection and diagnosis. By following this methodical approach, you can efficiently address the tire pressure warning light issue and ensure your vehicle's safety on the road.

What could cause the tire pressure warning light to stay on in a 2021 BMW X4?

When the tire pressure warning light remains illuminated in a 2021 BMW X4, it can be attributed to several common problems that DIY enthusiasts can troubleshoot. First and foremost, low tire pressure is the most frequent culprit; fluctuations in temperature or slow leaks can lead to insufficient air in one or more tires. Therefore, checking and inflating the tires to the recommended pressure is a crucial first step. If the tire pressure is adequate, the issue may lie with a faulty tire pressure sensor, which could be malfunctioning and failing to provide accurate readings. In such cases, recalibrating the sensors might resolve the problem. Additionally, electrical or wiring issues can disrupt the communication between the sensors and the dashboard, causing the warning light to stay on. Inspecting the wiring for any visible damage or loose connections can help identify this issue. If these DIY checks do not resolve the warning light, it may be necessary to consult a professional mechanic for a thorough diagnosis, ensuring that your BMW X4 remains safe and roadworthy.

What should I do if the tire pressure warning light on my 2021 BMW X4 stays on?

If the tire pressure warning light on your 2021 BMW X4 remains illuminated, it is crucial to take immediate action to ensure your safety and the longevity of your vehicle. Ignoring this warning can lead to decreased handling performance, increased tire wear, and even tire blowouts, which pose significant risks while driving. Start by checking the tire pressure in all four tires, as maintaining the correct pressure is essential for optimal performance. If you discover that the pressure is low, inflate the tires to the recommended levels found in your owner's manual. Additionally, inspect the tires for any signs of damage, such as punctures or bulges, which could compromise their integrity. Once you have addressed any pressure issues, resetting the tire pressure monitoring system is often necessary to clear the warning light. If the light persists despite your efforts, it is advisable to consult a certified BMW technician, as there may be underlying issues with the monitoring system that require professional attention. Taking these steps not only enhances your safety but also helps prevent costly repairs down the line.

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