In this guide
The right tyre pressure for your car is printed on a sticker in the driver’s door frame or fuel flap, not on the tyre itself. Check it with the tyres cold, at least once a month and before long trips. TPW, the tyre pressure warning, lights up when one or more tyres are low, and on many cars it needs a reset after you adjust the pressure.
This guide is written by the Mechanics workshop team in Al Quoz, Dubai. Tyre pressure and warning light questions are some of the most common things customers ask us about.
If you need new tyres or a sensor fixed, see our tyre replacement service and tyre pressure sensor service.
What is tyre pressure and why does it matter?
Tyre pressure is the amount of air inside the tyre. It is measured in PSI or bar.
- Keeps the tyre in the right shape on the road
- Gives the best grip and braking
- Makes the tyre wear evenly and last longer
- Helps fuel economy by cutting rolling resistance
Even a small drop matters. A tyre that is low does not always look flat, so the only reliable way to know is to measure it.
Modern low profile tyres hide low pressure well. By the time a tyre looks soft, it has often been low for days, wearing faster and running hotter than it should.
Where do you find the correct pressure?
Driver door frame
The most common place for the tyre pressure sticker.
Fuel filler flap
Many cars print the pressures inside the flap.
Owner’s manual
Lists pressures for normal and full load.
Not the tyre wall
The number on the tyre is the maximum, not the correct pressure.
Front and rear can be different. Many cars need different pressures front and rear, and higher pressure when fully loaded. Follow the sticker for your car.
How to check and inflate your tyres
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Check when cold
Before driving, or after the car has rested for a few hours. Hot tyres read higher.
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Find the right number
Use the sticker in the door frame or fuel flap.
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Remove the valve cap
Keep it safe. It stops dust and moisture getting into the valve.
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Measure with a gauge
Press the gauge firmly onto the valve and read the pressure.
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Add air in short bursts
Check again after each burst until you reach the right pressure.
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Refit the cap and repeat
Do all four tyres, and the spare if your car has one.
How Dubai heat affects tyre pressure
Air expands when it gets hot. On a summer day, tyre pressure rises as you drive and as the car sits in the sun.
Pressure goes up when tyres warm up. This is expected and already allowed for.
Never release air from hot tyres to reach the cold figure.
An underinflated tyre flexes more, builds heat and can fail.
Pressure drops when nights get cooler, so check more often.
On hot roads, a low tyre is the bigger danger. Heat plus low pressure is one of the main causes of tyre blowouts on highways.
Underinflated or overinflated, what happens?
| Effect | Too low | Too high |
|---|---|---|
| Tyre wear | Edges wear faster | Centre wears faster |
| Grip and braking | Vague steering, longer stops | Less contact, less grip |
| Heat | More flexing and heat | Normal |
| Fuel use | Higher | Slightly lower, but less grip |
| Comfort | Soft and wallowy | Harsh and bumpy |
| Damage risk | Sidewall damage and blowout | Impact damage from potholes |
Tyre warning light on or a tyre keeps going down? Send us a photo of the dashboard and your car model. We will tell you what to check and if it needs a visit.
What does TPW mean?
TPW stands for tyre pressure warning. It is part of the tyre pressure monitoring system, often called TPMS.
- Watches the pressure in all four tyres
- Lights a warning when a tyre is low
- On some cars shows the pressure of each tyre on screen
The warning usually looks like a tyre cross section with an exclamation mark. A steady light means low pressure. A flashing light that then stays on usually means a system fault.
Direct and indirect TPMS, what is the difference?
| Point | Direct TPMS | Indirect TPMS |
|---|---|---|
| How it works | A sensor inside each wheel measures pressure | Uses the ABS wheel speed sensors |
| What it detects | Actual pressure in each tyre | A low tyre turning faster than the others |
| Shows each tyre | Often yes | Usually no |
| Sensor batteries | Yes, they run out after some years | No extra sensors |
| After tyre changes | Sensors may need a relearn | System needs a reset |
Your owner’s manual says which type your car has. If you can see each tyre’s pressure on the dashboard screen, it is almost always direct.
How do you reset or set the TPW?
The method depends on the car. These are the common types.
Some cars have a TPW or SET button, often under the dashboard or in the glove box.
Many cars reset in the settings menu on the dashboard or centre screen.
Some systems learn by themselves after a short drive at normal speed.
Some direct sensors need a TPMS tool after tyre or sensor work.
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Set all tyres first
Inflate all four tyres to the correct cold pressure before any reset.
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Follow your manual
Use the exact reset method for your car. Steps differ between models.
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Drive to confirm
Many systems need a short drive to finish learning.
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Watch the light
If it comes back, there is a leak or a sensor fault to check.
Never reset to hide a low tyre. Resetting with a low tyre teaches the system the wrong value, and it may not warn you next time.
Why the tyre pressure light stays on
| What you notice | Likely cause | What to do |
|---|---|---|
| Light on, one tyre low | Slow puncture or valve leak | Inflate and have the tyre checked |
| Light on after inflating | System not reset | Reset as per the manual |
| Light flashes then stays on | Sensor or system fault | Scan the TPMS sensors |
| Light after tyre change | Sensor not relearned or damaged | Relearn or replace the sensor |
| Light in cooler weather | Pressure dropped with temperature | Top up to the cold pressure |
| Light comes and goes | Weak sensor battery or slow leak | Check sensor health and tyres |
What makes tyres lose air?
Natural loss
All tyres slowly lose some air over weeks.
Punctures
Nails and screws can cause slow leaks you do not notice.
Valve problems
Worn or corroded valves let air escape.
Rim damage
A bent or corroded rim can leak at the bead.
Temperature drop
Cooler weather lowers pressure.
Sensor seal
A damaged TPMS sensor seal can leak at the valve.
If one tyre keeps going down, have it checked. Bent or cracked wheels need a proper wheel damage assessment.
How Mechanics checks tyre and TPW problems
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Measure all tyres
Cold pressure in all four tyres and the spare, with a calibrated gauge.
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Look for leaks
Tread, sidewalls, valves and rim edges are checked for punctures and leaks.
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Scan the sensors
A TPMS tool reads each sensor, its signal and battery health.
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Repair and relearn
Puncture, valve or sensor is fixed, then the system is relearned or reset.
You get the findings and a written quote on WhatsApp before any repair.
Tread depth and tyre age
Pressure is only part of tyre safety. Tread and age matter just as much in Dubai heat.
- Check tread depth with the wear bars in the grooves
- Look for cracks in the sidewall, which heat speeds up
- Check the production date code on the sidewall
- Replace tyres with bulges, cuts or exposed cords
Uneven wear on one edge often points to wrong pressure or an alignment problem. See our wheel alignment service.
Tyre pressure for desert and dune driving
Many drivers in Dubai lower tyre pressure for sand. It helps the tyre spread out and float on soft dunes.
- Only lower pressure when you reach the sand
- Drive slowly and avoid sharp turns on low pressure
- Carry a compressor and a gauge
- Reinflate to the road pressure before you drive on tarmac
Never drive on the highway with sand pressure. Low tyres at road speed overheat quickly and can come off the rim or fail.
Spare tyres and run flat tyres
Check it every month. A flat spare is no help in an emergency.
Often needs a much higher pressure. Check the label and the speed limit on it.
Some cars have sealant and a pump. Check the sealant expiry date.
Can be driven a limited distance when flat. TPMS is essential, as you may not feel the flat.
Which tyre gauge should you use?
| Gauge type | Good points | Watch out for |
|---|---|---|
| Digital gauge | Easy to read, accurate | Needs a working battery |
| Dial gauge | Clear, no battery | Can be damaged if dropped |
| Pencil gauge | Cheap and small | Less accurate, hard to read |
| Petrol station machine | Convenient | Often worn or inaccurate |
| Car TPMS screen | Shows each tyre live | Check against a gauge now and then |
A small digital gauge in the glove box is one of the best low cost tools a driver can own. It lets you check the tyres cold at home, before you drive to the air machine.
Is nitrogen better than normal air?
Normal air is already mostly nitrogen.
Slightly slower pressure loss over time.
You still need to check pressure regularly.
Topping up nitrogen with air is safe.
Tyre and TPMS repair costs in Dubai
A pressure check is quick. Costs come from what the check finds.
| Finding | Typical job |
|---|---|
| Low pressure only | Inflate and reset |
| Puncture in the tread | Puncture repair if safe |
| Leaking valve | Valve or sensor seal kit |
| Dead TPMS sensor | New sensor and relearn |
| Damaged or worn tyre | Tyre replacement |
See the tyre price guide and the sensor price section for current Dubai budgets.
Get your tyres or TPW fixed. Send us these details on WhatsApp.
- Car make, model and year
- Photo of the warning light or tyre
- Which tyre is losing air, if you know
A simple monthly tyre routine
Five minutes a month keeps most tyre problems away. Do this at home with the car cold.
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Walk around the car
Look for nails, cuts, bulges and any tyre that looks lower than the others.
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Check all pressures
Use your own gauge and compare with the door sticker.
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Look at the tread
Check the wear bars and look for uneven wear on one edge.
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Check the valves
Make sure every valve has a cap and is not cracked.
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Note anything odd
If one tyre needs air every month, have it checked for a slow leak.
Rotating the tyres at the interval in your manual also helps them wear evenly. On cars with direct TPMS, the system may need a relearn after rotation.
Common tyre pressure mistakes
- Using the number on the tyre wall instead of the door sticker
- Letting air out of hot tyres
- Only checking when the warning light comes on
- Forgetting the spare tyre
- Resetting the TPW without fixing the low tyre
- Trusting a worn or cheap gauge
Tyre pressure myths and facts
| Myth | Fact |
|---|---|
| The tyre wall shows the right pressure | It shows the maximum. Use the car’s sticker. |
| You can see when a tyre is low | Modern tyres can look normal while low. |
| Lower pressure is better in summer | Low tyres overheat. Keep the correct cold pressure. |
| TPMS means no need to check | It warns late. Check monthly anyway. |
| Nitrogen never needs topping up | All tyres lose some pressure over time. |
Tyre pressure questions we get asked
What is the correct tyre pressure for my car?
It is on the sticker in the driver’s door frame or fuel flap, and in the owner’s manual. It differs between cars, and sometimes between front and rear tyres.
How often should I check tyre pressure?
At least once a month and before long trips, with the tyres cold. Check more often if you have had a puncture or the weather changes.
Why is my tyre pressure light on when the tyres look fine?
Tyres can be low without looking flat. The light can also stay on after inflating if the system was not reset, or if a sensor has a fault.
Should I let air out in summer?
No. Set the correct pressure when the tyres are cold. The rise when driving is normal. Letting air out of hot tyres leaves them low once they cool.
How long do TPMS sensors last?
Direct sensors have a sealed battery that runs out after some years. When it does, the sensor needs replacing and the system needs a relearn.
Do I need new sensors with new tyres?
Not always. Good sensors can move to the new tyres. The valve seal kit is usually renewed and the system may need a relearn.
Can I drive with the tyre pressure light on?
Only gently to the nearest place to check the tyres. If a tyre is very low or flat, do not drive on it, as it can be damaged or fail.
Why does one tyre keep losing air?
Common causes are a slow puncture, a leaking valve or sensor seal, or a damaged rim edge. A workshop can find the leak and fix it.
Does tyre pressure affect fuel use?
Yes. Low tyres increase rolling resistance, so the engine works harder. Correct pressure helps fuel economy and tyre life.
What is the difference between TPW and TPMS?
TPMS is the whole tyre pressure monitoring system. TPW is the warning it gives you, usually the light on the dashboard. People often use the two names for the same thing.
Do you fix tyre and TPMS problems at your workshop?
Yes. Send us your car details and the problem on WhatsApp and we will tell you what is likely needed and the price.
Checked against the NHTSA tyre safety guide and HELLA wheel speed sensor information. Always use the tyre pressures printed for your exact vehicle.
