EXPERT IN AUTO PARTS
21 November 2025 (updated) Table of Contents
Your car's tyre pressure monitoring system (TPMS) is one of the most important safety features you might take for granted. These clever devices help prevent accidents, improve fuel efficiency, and extend tyre life by keeping you informed about your tyre pressure. Let's explore everything you need to know about how they work and what to do when something goes wrong.
Tyre pressure sensors are small electronic devices that monitor the air pressure in your tyres and alert you when levels drop dangerously low. Since 2012, all new cars in the UK must have TPMS fitted as standard, making roads safer for everyone.
There are two main types of systems: direct and indirect. Direct sensors physically measure pressure inside each tyre, while indirect systems use your car's ABS to detect pressure changes based on wheel speed differences.
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£34.99£139.96 / Price per 4 items
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Direct systems use car tyre pressure sensors mounted inside each wheel, typically near the valve stem. These sensors contain:
When pressure drops below safe levels, the system triggers a warning light on your dashboard. This gives you real-time, accurate information about each individual tyre.
Indirect systems are more budget-friendly but less precise. They monitor wheel speed through your ABS sensors, detecting when a tyre rotates faster due to reduced diameter from low pressure. While cost-effective, they can't provide specific pressure readings or detect gradual pressure loss as effectively.
The table below shows the key differences between direct and indirect systems to help you understand your car's setup.
| Feature | Direct TPMS | Indirect TPMS |
| Accuracy | Highly accurate, real-time readings | Less precise, comparative readings |
| Individual tyre monitoring | Yes | No |
| Battery replacement | Required every 5–10 years | Not needed |
| Cost | £200–400 per sensor | Lower maintenance costs |
| Leak detection | Excellent for gradual and rapid leaks | Limited detection capability |
When your TPMS develops faults, you'll notice several warning signs:
Understanding why sensors fail helps you prevent problems and budget for repairs:
This breakdown helps you plan for TPMS-related expenses throughout your car's life.
| Service | Typical cost range | When needed |
| Single sensor replacement | £50–200 | Every 5–10 years |
| Full system replacement | £200–800 | Rarely, usually with battery failure |
| Professional calibration | £20–50 | After tyre changes |
| Diagnostic check | £30–60 | When warning lights appear |
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Article number: 1337
£4.99
Price per item
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BOSCH Tyre pressure sensor (TPMS)
Article number: F 026 C00 467
£33.99£135.96 / Price per 4 items
price incl. 20% VAT, excl. delivery costs
Article number: 1420
£4.99
Price per item
price incl. 20% VAT, excl. delivery costs
Article number: 3021
£27.99
Price per item
£111.96 / Price per 4 items
price incl. 20% VAT, excl. delivery costs
HUF Tyre pressure sensor (TPMS)
Article number: 43475000
£28.49£113.96 / Price per 4 items
price incl. 20% VAT, excl. delivery costs
Some manufacturers like Ford tyre pressure sensor systems may require specific replacement parts, so always check compatibility before purchasing.
Don't panic if your TPMS warning light activates while driving. Follow these steps:
Most modern cars allow you to reset the system through the dashboard menu:
AUTODOC experts advise that if the light continues flashing after reset, book a diagnostic check with a qualified technician.
Regular maintenance keeps your system working properly:
When fitting new tyres, ensure you're getting great car tyre offers that include proper TPMS sensor handling and calibration.
Your TPMS is a vital safety system that requires occasional attention but provides invaluable protection. Understanding how it works, recognising problems early, and maintaining it properly will keep you safe on the road while avoiding costly repairs. Remember that while TPMS helps monitor pressure, it's no substitute for regular manual checks and proper tyre maintenance.
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