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Home > Tyres > Tyre Pressure Monitoring System

Tyre Pressure Monitoring System: Facts & Regulation

From 1st November 2014, in compliance with EU safety regulations, all new vehicles built are fitted with a Tyre Pressure Monitoring System (TPMS). This safety feature is fitted to the wheels of all cars and some vans. It uses a sensor to detect sudden or gradual changes in tyre pressure and alerts the driver.

Keeping your tyres properly inflated is essential for your safety on the road. Not only will correct tyre pressures reduce the risk of suffering a dangerous high speed blowout, but it will also give you better handling and braking.

What's more, maintaining your vehicle's tyre pressure at the correct inflation means your tyres will last longer, you'll use less fuel and you'll even reduce your impact on the environment. 

Your tyres will lose pressure naturally over time so it's important that you check them at least once a month or before and long journeys. 

More Information

What is the Tyre Pressure Monitoring System?

The Tyre Pressure Monitoring System (TPMS) is an automatic monitoring system designed to control the pressure of tyres for light vehicles.

The system monitors tyre pressure and temperature at all times and alerts the driver if there are any problems in one or more tyres, allowing issues to be dealt with straight away to increase safety and other problems that can emerge due to under inflation.

What are the different types of TPMS?

There are two different types of TPMS - indirect and direct, which differ in a few ways. 

Some car marques have offered TPMS for many years but they typically use the 'indirect' TPMS system. This uses the car’s ABS system to approximate tyre pressures. From 1st November 2014, most cars will be fitted with a newer and more accurate 'direct' TPMS system. 

Indirect TPMS

  • The older system, indirect TPMS measures tyre pressure through sensors attached to the ABS and ESP sensors.
  • This monitors the rotations of the various wheels by the position of the sensors and compares the rolling circumference, which shows if tyres are not equally inflated.
  • It is the basic and existing system for most cars that have TPMS already, but has some issues. It can be technically challenging, largely because the increase in inner pressure as tyres heat up needs to be taken into account.

The car marques that offered TPMS before November 2012 typically used the 'indirect' TPMS system. From 1st November 2014, most cars will be fitted with a newer and more accurate 'direct' TPMS system.

Direct TPMS

Direct TPMS uses sensors in each wheel to accurately measure pressure information, almost in real time, and feed it back to the car’s telemetry system. If a sudden or gradual decline inpressure is detected, the driver will be alerted through a light or message on their dashboard. This system is generally accepted to be more reliable and safer.

  • With direct systems, the sensors are fitted to the air valves of tyres, allowing for a more accurate and quicker reading.
  • These measure the pressure in the tyres directly rather than calculating it based on rotation of tyres.
  • Original Equipment (OEM) valve sensors and programmable universal sensors both fall under direct TPMS.

What are the benefits of having TPMS?

The main reasons the EC has brought in these new regulations is to address issues surrounding under inflation and the impact that this has on safety, economy and ecology.

  • You're safer –It isn’t always obvious that your tyres are losing pressure. But tyres that are driven underinflated are more likely to suffer a sudden tyre failure. TPMS alerts you almost straightaway of any pressure loss.
     
  • It can save you money The additional rolling resistance of an underinflated tyre means that your vehicle is less fuel efficient. In short, your engine will use more fuel, over time. And don’t forget, underinflated tyres are more likely to wear more quickly.
     
  • It's greener – With higher tyre rolling resistances and lower fuel economy, the cost to the environment is also higher. Pollution from your car, extra fuel being burnt and the premature end of tyre life all have a damaging effect on the environment.

How does this affect replacing my tyres?

In short, if your vehicle has indirect TPMS fitted, it most likely won’t make any difference. We may need to reset the system at the end.

However, replacing tyres on vehicles with a direct system is different and it may take a little longer than cars with indirect or no TPMS. Each tyre has a special valve with a dedicated sensor and we need to ensure the integrity and safety of the whole system.

Here's an illustration of a typical sensor valve:

Therefore, it’s important for us to check each valve before undertaking any work using approved diagnostic equipment*. If the diagnostic check spots a fault with your TPMS that requires further action, we’ll advise you before proceeding with any work. If you need your tyre(s) replacing, it’s straightforward.

Rather than replacing the valve, as we would do on a car without TPMS, we’ll replace selected components of each existing valve using a service kit. This prolongs the valve’s life and ensures that the TPMS is not compromised. And after fitting the new tyre(s), we’ll reset and test your vehicle’s TPMS to check that it’s working correctly. This service is charged for separately on top of the cost of your tyres but replaces the cost of a normal rubber valve.

* Not every ATS Euromaster centre is equipped with diagnostic equipment.

What happens if my sensor is faulty? 

The batteries in the sensors are expected to last an average of 5-7 years. However, if the battery fails or if a fault develops in your sensor, ATS Euromaster can diagnose the fault with our specialist diagnostic equipment. We can supply replacement valves and valve sensors if necessary.

Should your sensor or valve incur damage, ATS Euromaster is able to supply replacement parts of approved Original Equipment (OE) quality*. We can reprogram the sensors to the vehicle’s TPMS using specialist equipment.

* The fitment of non-genuine replacement parts may invalidate your vehicle manufacturer warranty. Please ask for details.

European TPMS Legislation

As of November 1st 2014, the European Commission EC introduced new regulations that require all vehicles of a certain class to be fitted with a precise system to monitor tyre pressure.

Selected passenger vehicles with a maximum of eight seats (not including the drivers seat) are required to be fitted with a tyre pressure monitoring system.

However, if you are driving an older vehicle, the TPMS regulation may not affect you. Cars that require a TPMS system are either: 

  • New cars registered after November 1st 2012 or
  • All new cars manufactured and registered after November 1st 2014.

Under the new regulation, the EC states: 

  • It is not permitted to switch off / deactivate the TPMS.
  • It is not permitted to use wheels without a TPMS system.
  • As of 2012, changes to the MOT testing regulations classify malfunctioning or inoperative Tyre Pressure Monitoring Systems as an fail.*

* Source: TyreSafe 

What is the Tyre Pressure Monitoring System?

The Tyre Pressure Monitoring System (TPMS) is an automatic monitoring system designed to control the pressure of tyres for light vehicles.

The system monitors tyre pressure and temperature at all times and alerts the driver if there are any problems in one or more tyres, allowing issues to be dealt with straight away to increase safety and other problems that can emerge due to under inflation.

What are the different types of TPMS?

There are two different types of TPMS - indirect and direct, which differ in a few ways. 

Some car marques have offered TPMS for many years but they typically use the 'indirect' TPMS system. This uses the car’s ABS system to approximate tyre pressures. From 1st November 2014, most cars will be fitted with a newer and more accurate 'direct' TPMS system. 

Indirect TPMS

  • The older system, indirect TPMS measures tyre pressure through sensors attached to the ABS and ESP sensors.
  • This monitors the rotations of the various wheels by the position of the sensors and compares the rolling circumference, which shows if tyres are not equally inflated.
  • It is the basic and existing system for most cars that have TPMS already, but has some issues. It can be technically challenging, largely because the increase in inner pressure as tyres heat up needs to be taken into account.

The car marques that offered TPMS before November 2012 typically used the 'indirect' TPMS system. From 1st November 2014, most cars will be fitted with a newer and more accurate 'direct' TPMS system.

Direct TPMS

Direct TPMS uses sensors in each wheel to accurately measure pressure information, almost in real time, and feed it back to the car’s telemetry system. If a sudden or gradual decline inpressure is detected, the driver will be alerted through a light or message on their dashboard. This system is generally accepted to be more reliable and safer.

  • With direct systems, the sensors are fitted to the air valves of tyres, allowing for a more accurate and quicker reading.
  • These measure the pressure in the tyres directly rather than calculating it based on rotation of tyres.
  • Original Equipment (OEM) valve sensors and programmable universal sensors both fall under direct TPMS.

What are the benefits of having TPMS?

The main reasons the EC has brought in these new regulations is to address issues surrounding under inflation and the impact that this has on safety, economy and ecology.

  • You're safer –It isn’t always obvious that your tyres are losing pressure. But tyres that are driven underinflated are more likely to suffer a sudden tyre failure. TPMS alerts you almost straightaway of any pressure loss.
     
  • It can save you money The additional rolling resistance of an underinflated tyre means that your vehicle is less fuel efficient. In short, your engine will use more fuel, over time. And don’t forget, underinflated tyres are more likely to wear more quickly.
     
  • It's greener – With higher tyre rolling resistances and lower fuel economy, the cost to the environment is also higher. Pollution from your car, extra fuel being burnt and the premature end of tyre life all have a damaging effect on the environment.

How does this affect replacing my tyres?

In short, if your vehicle has indirect TPMS fitted, it most likely won’t make any difference. We may need to reset the system at the end.

However, replacing tyres on vehicles with a direct system is different and it may take a little longer than cars with indirect or no TPMS. Each tyre has a special valve with a dedicated sensor and we need to ensure the integrity and safety of the whole system.

Here's an illustration of a typical sensor valve:

Therefore, it’s important for us to check each valve before undertaking any work using approved diagnostic equipment*. If the diagnostic check spots a fault with your TPMS that requires further action, we’ll advise you before proceeding with any work. If you need your tyre(s) replacing, it’s straightforward.

Rather than replacing the valve, as we would do on a car without TPMS, we’ll replace selected components of each existing valve using a service kit. This prolongs the valve’s life and ensures that the TPMS is not compromised. And after fitting the new tyre(s), we’ll reset and test your vehicle’s TPMS to check that it’s working correctly. This service is charged for separately on top of the cost of your tyres but replaces the cost of a normal rubber valve.

* Not every ATS Euromaster centre is equipped with diagnostic equipment.

What happens if my sensor is faulty? 

The batteries in the sensors are expected to last an average of 5-7 years. However, if the battery fails or if a fault develops in your sensor, ATS Euromaster can diagnose the fault with our specialist diagnostic equipment. We can supply replacement valves and valve sensors if necessary.

Should your sensor or valve incur damage, ATS Euromaster is able to supply replacement parts of approved Original Equipment (OE) quality*. We can reprogram the sensors to the vehicle’s TPMS using specialist equipment.

* The fitment of non-genuine replacement parts may invalidate your vehicle manufacturer warranty. Please ask for details.

European TPMS Legislation

As of November 1st 2014, the European Commission EC introduced new regulations that require all vehicles of a certain class to be fitted with a precise system to monitor tyre pressure.

Selected passenger vehicles with a maximum of eight seats (not including the drivers seat) are required to be fitted with a tyre pressure monitoring system.

However, if you are driving an older vehicle, the TPMS regulation may not affect you. Cars that require a TPMS system are either: 

  • New cars registered after November 1st 2012 or
  • All new cars manufactured and registered after November 1st 2014.

Under the new regulation, the EC states: 

  • It is not permitted to switch off / deactivate the TPMS.
  • It is not permitted to use wheels without a TPMS system.
  • As of 2012, changes to the MOT testing regulations classify malfunctioning or inoperative Tyre Pressure Monitoring Systems as an fail.*

* Source: TyreSafe 

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