2020 BMW 740i XDrive Tire Pressure Warning Light Stays On

Resolve Tire Pressure Warning Light in 2020 BMW 740i xDrive: Causes and Solutions

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Reviewed by
Devin Cabugcal
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 2020 BMW 740i xDrive 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 2020 BMW 740i xDrive 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 on my 2020 BMW 740i xDrive?

To effectively diagnose the tire pressure warning light issue on your 2020 BMW 740i xDrive, start with a manual check of the tire pressure using a reliable gauge. This initial step is crucial as it allows you to compare the readings against the recommended levels found in your owner's manual, ensuring that all tires, including the spare, are adequately inflated. Next, visually inspect 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. If the tire pressures are correct and no visible damage is found, proceed to reset the Tire Pressure Monitoring System (TPMS) according to the instructions in your manual; this can often resolve minor glitches. Should the warning light persist after these steps, it may be time to consult a professional mechanic or a BMW dealership, as they possess the specialized tools necessary for a thorough diagnosis. Lastly, consider the possibility of faulty tire pressure monitoring sensors, which may require replacement if they are determined to be the source of the issue. By following this structured approach, you can efficiently identify and address the cause of the tire pressure warning light on your vehicle.

What could be causing the tire pressure warning light to stay on in a 2020 BMW 740i xDrive?

When the tire pressure warning light stays on in your 2020 BMW 740i xDrive, it’s essential to identify the underlying issues that may be causing this alert. One of the most frequent reasons is low tire pressure, which can result from natural air loss or fluctuations in temperature, particularly during colder months. Regularly checking and maintaining your tire pressure at the recommended levels can often rectify this problem. Another possibility is a malfunctioning tire pressure sensor; if the sensor is defective, it may need to be replaced to ensure accurate readings. Additionally, sensor calibration issues can occur, where the sensors fail to provide correct pressure data, requiring professional recalibration. It's also important to inspect your tires for any damage or slow leaks, as these can lead to reduced pressure and trigger the warning light. Lastly, consider the potential for electrical issues within the tire pressure monitoring system, which may necessitate further diagnostic work. By addressing these common problems, you can effectively troubleshoot and resolve the tire pressure warning light issue in your BMW, ensuring a safer driving experience.

What immediate steps should be taken to address the tire pressure warning light on a 2020 BMW 740i xDrive?

When the tire pressure warning light illuminates on your 2020 BMW 740i xDrive, it is crucial to act promptly to avoid serious safety risks and potential damage to your vehicle. Ignoring this warning can lead to decreased traction, increased tire wear, and even tire blowouts, which can compromise your safety on the road. Start by checking the tire pressure of all four tires with a reliable gauge, ensuring they meet the manufacturer's specifications found in your owner's manual or on the door jamb. If you discover any tires are underinflated, use an air compressor to inflate them to the correct levels. Additionally, inspect each tire for visible damage, such as punctures or bulges, as these can exacerbate the problem and require immediate attention. Once you have adjusted the tire pressure and addressed any damage, remember to reset the Tire Pressure Monitoring System (TPMS) to ensure it accurately reflects the new tire conditions. By taking these steps, you not only enhance your vehicle's performance but also prioritize your safety and that of others on the road.

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