TPMS Failure: A Major MOT Issue for Vehicles After 2012

Table of Contents

Introduction to TPMS

Understanding TPMS

The Tyre Pressure Monitoring System (TPMS) is an electronic system designed to monitor the air pressure within vehicle tyres. It alerts drivers when the pressure falls below recommended levels, potentially averting safety hazards and enhancing vehicle performance. By keeping tyres properly inflated, a TPMS aids in maintaining optimal handling, fuel efficiency, and tyre longevity.

The Importance of TPMS in Vehicle Safety

TPMS is crucial for preventing accidents caused by under-inflated tyres. Driving with under-inflated tyres can lead to poor vehicle handling, increased stopping distances, and even tyre blowouts, which are dangerous at high speeds. Properly inflated tyres ensure improved fuel economy and reduced emissions, fostering both safety and environmental benefits.

By eliminating the guesswork regarding tyre pressure, TPMS provides drivers with confidence and promotes proactive maintenance. This system not only enhances driving safety but also contributes to lowered running costs by preventing undue tyre wear and improving fuel efficiency.

Discover the importance of TPMS in vehicle safety, its role in MOT testing, and how to prevent common issues like sensor failure and corrosion to avoid costly repairs.

TPMS and MOT Testing

Introduction to TPMS in MOT Testing

Starting in January 2015, the MOT test in the UK included checks for the Tyre Pressure Monitoring System (TPMS) for vehicles registered after 1 January 2012. This change marked a significant step in vehicle safety standards, recognising the critical role TPMS plays in maintaining proper tyre pressure and, in turn, vehicle safety.

Why TPMS Failure is a Major Defect

A malfunctioning TPMS is categorised as a ‘major’ defect during MOT inspections. This is because a faulty TPMS can lead to unsafe driving conditions. If this system isn’t working properly, it doesn’t alert drivers to under-inflated tyres, which can cause poor handling, increased braking distances, and potentially dangerous blowouts. The inclusion of TPMS checks aims to reduce these risks, ensuring that faults are addressed promptly.

Impact on Vehicles After 2012

For vehicles registered from January 2012 onwards, the TPMS must be fully operational to pass the MOT. Any car showing a TPMS warning light due to malfunction will automatically fail. This requirement places responsibility on drivers to ensure their TPMS is in good working order to meet the statutory standards and avoid MOT failures.

The regulation’s introduction highlights the broader commitment to road safety, acknowledging that tyre maintenance is a critical aspect of vehicle operation.

Drivers should be particularly attentive to TPMS warnings and seek immediate repairs when necessary. Regular checks can prevent MOT failures, ensuring compliance with the law and promoting safer driving culture.

Discover the importance of TPMS in vehicle safety, its role in MOT testing, and how to prevent common issues like sensor failure and corrosion to avoid costly repairs.

Common Causes of TPMS Failure

Maintaining the Tyre Pressure Monitoring System (TPMS) is crucial for vehicle safety. A failing TPMS can result from several issues that might not always be immediately apparent. Understanding these common causes can help in preventive maintenance and avoid potential MOT issues.

Battery Failure in TPMS Sensors

One of the most frequent causes of TPMS failure is battery exhaustion within the sensors. Typically, TPMS batteries have a lifespan of 5 to 10 years, depending on usage and environmental factors. As these batteries are sealed in the sensor housing, they cannot be replaced separately, requiring the complete sensor to be changed when the battery fails. A dying battery can lead to erratic sensor performance or trigger the system to give a malfunction warning, indicated by a blinking light on the dashboard.

Damaged or Corroded Sensor Stems

Physical damage to the sensor stems is another common reason for TPMS failure. Such damage can occur during tyre replacement if proper tools or techniques aren’t used. Furthermore, corrosion is a significant concern, particularly for vehicles operating in regions with high road salt usage or moisture. This corrosion can weaken the metal components, leading to sensor failure over time.

Malfunctioning TPMS Components

Beyond batteries and stems, other parts of the TPMS can malfunction due to wear and tear or exposure to extreme conditions. Faulty wiring, interference from electromagnetic sources, or even component age can lead to system failures. Ensuring that components are checked and maintained regularly can mitigate these issues.

Regular checks and prompt attention to warning signals are key to keeping your TPMS in optimal condition. By addressing these common causes, drivers can avoid unexpected failures and enhance safety on the road.

Discover the importance of TPMS in vehicle safety, its role in MOT testing, and how to prevent common issues like sensor failure and corrosion to avoid costly repairs.

Consequences of Driving with Faulty TPMS

Driving with a faulty Tyre Pressure Monitoring System (TPMS) may seem like a trivial issue, but it carries significant risks and costs that drivers should not overlook.

Safety Concerns

A malfunctioning TPMS can introduce serious safety hazards. The system is designed to alert drivers to low tyre pressure, which is crucial for maintaining proper vehicle handling and stability. If the TPMS fails, you might not receive a timely warning about under-inflated tyres. This can lead to tyre blowouts or loss of control, posing risks not only to the driver but also to other road users. In extreme cases, unnoticed low tyre pressure can cause the vehicle to behave unpredictably, especially in adverse weather or on challenging road surfaces. Ensuring that the TPMS is in good working order contributes directly to road safety.

Increased Running Costs

Another consequence of neglecting TPMS issues is the financial impact. Tyres that are not inflated correctly can significantly reduce fuel efficiency. For every 1 PSI drop in tyre pressure across all four tyres, fuel mileage can decrease by up to 0.1 percent. This doesn’t seem like much, but over time, the costs can add up. Additionally, driving with under-inflated tyres increases drag, requiring more energy and thus more fuel to maintain speed. The knock-on effect is higher spending at the fuel pump.

Accelerated Tyre Wear

Tyres are designed to perform optimally at specific pressures. If the TPMS fails and tyres are persistently under- or over-inflated, it could lead to uneven and rapid tyre wear. Under-inflated tyres cause the sidewalls to flex more than they should. Over time, this can weaken the tyre structure, making them susceptible to punctures or sudden failure. Conversely, over-inflated tyres may wear out the centre tread more rapidly, reducing their effective lifespan. Both scenarios lead to more frequent tyre replacements, which is a cost no driver wants to incur unnecessarily.

Regular maintenance of your TPMS ensures not just compliance with safety regulations, but also helps avoid unforeseen expenses and sustain the longevity of tyres. As we move forward, understanding the preventative steps for TPMS-related MOT failures is essential for keeping these costs and risks at bay.

Discover the importance of TPMS in vehicle safety, its role in MOT testing, and how to prevent common issues like sensor failure and corrosion to avoid costly repairs.

Preventing TPMS-Related MOT Failures

Maintaining your Tyre Pressure Monitoring System (TPMS) is crucial to ensure your vehicle passes its MOT tests and remains safe on the road. A fully functioning TPMS not only supports safer driving conditions but also contributes to better fuel efficiency and tyre longevity. Here’s how you can prevent TPMS-related MOT failures.

Regular Monitoring of Tyre Pressures

Regularly checking your tyre pressures is the simplest way to prevent TPMS-related issues. A TPMS alerts you when your tyre pressure is low, aiding you in maintaining optimal levels. Yet, solely relying on the system can lead to oversight. A manual check using a pressure gauge, ideally each month, ensures accurate readings and early detection of any discrepancies.

Monthly Manual Checks of Tyre Condition

Conducting monthly inspections of your tyres helps catch issues that might not trigger a TPMS alert. Look for signs of wear, punctures, bulges, or cracks. The penny test is a handy method to check tread depth—insert a penny into the groove, and if Lincoln’s head is visible, it’s time to replace the tyre.

Occasional Servicing of TPMS

TPMS components require attention to maintain their effectiveness. Scheduling periodic TPMS services can avert potential failures. Essential servicing includes checking the sensors’ condition and replacing worn parts like the valve core and cap. It’s also prudent to replace TPMS components such as sensors every five to ten years or in line with your tyre replacement schedule.

Regular servicing prevents issues like corrosion or battery failure, which are common causes of TPMS malfunction. By ensuring each part of the system is in top shape, you significantly reduce the risk of MOT failures.

TPMS failure can lead to MOT failure for vehicles after 2012. Explore the causes, preventative maintenance tips, and cost-effective repair solutions to stay compliant.

TPMS Maintenance and Replacement

Importance of Preventative Maintenance

Staying on top of Tyre Pressure Monitoring System (TPMS) maintenance is crucial for both vehicle safety and cost control. Regularly checking and servicing your TPMS can save you from unexpected failures and major expenses. A proactive approach can extend the life of your sensors, ensuring accurate pressure readings and optimal tyre performance.

Preventative maintenance tasks include:

  • Regular Sensor Checks: Inspect sensors and ensure they are secure. Look out for any signs of damage or corrosion.
  • Battery Replacements: TPMS sensor batteries typically last 5-10 years. Replacing them as needed avoids sudden sensor failures.
  • Valve Service: Replace valve cores and seals during tyre changes to prevent leaks and ensure the integrity of the sensor system.

Maintaining your TPMS not only boosts safety by preventing tyre blowouts and handling issues but also improves fuel efficiency and tyre longevity, offering a smoother and safer driving experience.

Replacement Options for Faulty TPMS Sensors

When a TPMS sensor fails, replacement is necessary. You have several options depending on your budget and preferences:

  • OEM Sensors: These are original manufacturer parts, usually offering reliable performance but at a higher cost. They are a good choice for those prioritising quality and warranty assurances.
  • Aftermarket Sensors: These can be more affordable and still provide satisfactory performance. Brands like Schrader and Bosch offer reputable aftermarket options.
  • Rebuild Kits: If the sensor housing is undamaged, rebuild kits can replace individual components like grommets and seals, offering a cost-effective alternative to replacing the entire sensor.

Cost-Effective Solutions Compared to Dealership Replacements

Dealership replacements can be costly, so exploring alternatives might be worthwhile. Here are some cost-effective options:

  • Independent Mechanics: They often charge less for parts and labour compared to dealerships while providing similar levels of expertise.
  • Online Purchases: Consider purchasing sensors online from platforms like eBay or specialised automotive sites, where prices can be significantly lower.
  • Bundled Services: Some tyre shops offer package deals for bulk sensor replacements, potentially reducing the overall cost.

By considering these options, you can maintain your TPMS effectively without breaking the bank, ensuring your vehicle remains safe and efficient.

As with any component of vehicle maintenance, staying informed and prepared is key. With regular checks and smart replacement strategies, you’ll keep your TPMS in top shape, benefiting both your wallet and your peace of mind.

Discover the importance of TPMS in vehicle safety, its role in MOT testing, and how to prevent common issues like sensor failure and corrosion to avoid costly repairs.

Conclusion

The Significance of TPMS

Tyre Pressure Monitoring Systems (TPMS) have proved indispensable for modern vehicles. By alerting drivers to changes in tyre pressure, TPMS contributes directly to increased road safety, better fuel efficiency, and prolonged tyre life. Vehicles equipped with this technology can avoid common tyre-related issues like blowouts and uneven wear, thus safeguarding occupants and other road users.

The introduction of TPMS into the MOT tests from January 2015 underscores its critical role in vehicle safety assessments. As a major defect in MOT testing, TPMS failures can lead to costly repairs and penalties, highlighting the need for regular maintenance and checks.

Regular Checks and Maintenance

Preventive measures are essential for TPMS to function optimally. Regular checks of tyre pressure and condition are crucial. A monthly inspection can mitigate potential failures, ensuring tyres remain within the defined pressure range. It’s wise to occasionally service TPMS components, replacing sensors as needed, generally every five to ten years.

Opt for replacement sensors that are cost-effective, such as those available from independent mechanics, rather than defaulting to dealership options. This not only maintains safety but also manages expenses efficiently.

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