Tire pressure sensors provide information about the pressure inside the tire. By the sign of the indicator, one can know whether the pressure is accurate or not. So any problems with the sensor can lead to severe damage to the tire or the vehicle.
What’s is the most common Mercedes Tire Pressure Sensor Problems? Mercedes tyre pressure sensors can face problems like low battery, damaged circuits, corroded sensors, etc. If any of these occur you won’t get accurate data regarding the pressure condition inside tires. This may cause under or over-inflation of tires.
So, it’s really important to know what can cause problems with the pressure sensor and how to fix it. This article is all about that. So, let’s begin.
Where is TPMS located in Mercedes?
Generally, the TPMS module is located inside the tire. It is fixed to the inner portion of the tire rim.
Though for different vehicles the position can change, the conventional location is within the wheel rim. By removing the tire, there you will see a cylindrical shaped enclosure inside the rim. This is basically the TPMS module.
For your specific vehicle model, it’s better to check the owner’s manual to know the exact location of the sensor.
Why does the Mercedes tire pressure sensor problem occur?
Mercedes tire pressure sensors can stop working for several reasons. Though it can be some circuit issues or wiring problems, there are some other reasons that can affect the sensor.
Here below, some of the probable causes are mentioned. Don’t forget to check and fix it immediately if you see any of these.
#1- Accidents or damage:
Often you may have driven on rough roads which can damage the tire pressure sensor. If nails or any sharp objects penetrate the tires it can also damage the sensor. In that case, the sensor can cause severe problems.
#2- Dead battery:
If the TPMS module which is the “Tire Pressure Monitoring System” is disconnected from the power supply, or the battery power is low, then the sensor may stop working.
#3- Wear and corrosion:
Nothing to surprise that the TPMS module as well as the sensor itself may get corroded, If it happens, then the sensor will stop working and the only solution that will work is to replace the TPMS with a new one.
Handy Hints: I covered detailed about TPMS Light On But Tires Are Fine in my previous blog post. Although not essential to this post, reading that post will give you full overview of What Is TPMS Tire Pressure Monitoring System (TPMS)? HOW Does TPMS Work?
3 most common Symptoms of a bad pressure sensor
There are some symptoms that may indicate that the TPMS module is not working properly. Well, it’s not certain that there will always be one of these symptoms, these are just seen in most cases.
So, if you see any of these symptoms, don’t delay giving a check to the sensor or the whole TPMS model.
- Dash light not working:
Sometimes you may see the TPMS dash light is not working properly. It may always be turned ON or never comes ON. No matter whether your tire is out of pressure or perfectly fine, the dash light is not changing its state. It is an obvious indication that there is something wrong with the sensor of your Mercedes.
- TPMS giving incorrect readings:
If there is any problem with the sensor, the TPMS will provide incorrect info about the pressure. For example, maybe your tire is under or over-inflated, still, there is no sign or warning in the TPMS module or light. Checking tire pressure frequently will make you sure about this.
- Pressure issue:
If the pressure is fluctuating too much, at least as per the TPMS module, then it may be a problem with the sensor, not the actual pressure.
These can be some indications of issues with the sensor.
Result of faulty tire pressure sensor
The main problem that comes with a faulty sensor is the wrong alert about the pressure condition in the tires. A damaged sensor is not a danger in itself, but it may lead to severe damage.
You may know that if you drive with an under-inflated tire, it will increase the wear rate of the tires. Not only that, but it will also increase the fuel consumption rate. So, if your pressure sensor is not working, how may you know the tire pressure is low unless you regularly check the tires?
The opposite is also true for over-inflated tires. It decreases the braking effectivity and also makes the controlling hard.
No matter, which is the case, both are dangerous both for your vehicle as well as your safety. So, the TPMS or pressure sensor must work perfectly. Otherwise, it can be severe.
How to fix Mercedes Tire Pressure Sensor Problems?
Fixing the Mercedes tire pressure sensor can be done in several different ways. Here I’m mentioning the most common ways to fix the sensor.
1. Resetting the TPMS:
Resetting the Mercedes tire pressure sensor or TPMS module is very easy if you know how to do so. Just follow these steps.
- Turn the ignition switch ON.
- In the computer dashboard, scroll down to the menu named Tire pressure.
- Click on the menu and it will show all the TPMS conditions for four tires.
- When the pressure will be calibrated or adjusted, it will give you the option to reset or restart the TPMS module.
- Click on the option to reset it. After resetting the light will go down.
2. Replacing TPMS:
If resetting is not working, there may be a severe issue with the TPMS itself. In that case, changing may be the only option to consider. It will cost around 150 to 300$ to replace the TPMS module for your Mercedes.
I’ll recommend consulting with a professional mechanic to make it done. Otherwise, a lack of experience may cost you more damage.
How much does it cost to repair a Mercedes tire pressure sensor?
The price of changing the pressure sensor for Mercedes can vary with the particular model, region of service, additional cost, etc.
But on average t can cost you $150 for changing the sensor. For all four sensors, it may cost around 300$. Since there is no fixed amount, you should discuss it with the mechanic or service provider to be sure about the cost.
frequently asked questions (FAQs)
Why is my tire pressure light on with full tires?
A faulty TPMS module can be the reason behind this. Try to replace it with a new one or consult with a mechanic.
Should I replace all tire sensors at once?
Yes, it is recommended to change all the sensors at the same time. Because in most cases they remain nearly in the same condition.
How long do tire pressure sensors last?
Generally tire pressure sensors last for 7 to 10 years depending on the quality and maintenance.
Tire pressure sensor is a vital part of the whole automotive system. Any issues with the sensor will gradually affect the whole vehicle. So, it’s necessary to know what bad can happen.
Mercedes has an advanced system to reset the tire pressure sensor. So, you can do it automatically. For many other vehicles, there’s a reset button for doing this. Most of the problems can be solved by resetting the sensor.
If resetting doesn’t work, maybe there is some problem with the sensor itself. Repairing or replacing can solve this issue.
Certification: BSc in Mechanical Engineering
Education: Mechanical engineer
Lives In: 539 W Commerce St, Dallas, TX 75208, USA
Rasel is an auto mechanic student and writer with over half a decade of experience in the automotive field. He has worked with top automotive brands such as Lexus, Quantum, and also owns two automotive blogs autocarneed.com and taxiwiz.com.