Jaecoo Tyre Pressure and TPMS Guide

What pressure should your Jaecoo tyres be? Why does the reading change after you have just put air in? And does a tyre pressure warning need resetting? This guide explains how to find the right setting, make a useful pressure check and work out what to investigate next.

It covers everyday checks for UK J5, E5 Electric, J7 petrol, J7 Hybrid, J7 PHEV (SHS-P) and J8 PHEV owners. The pressure figures and TPMS examples below identify the particular handbooks they come from because equipment and reset procedures can differ.

Start with your car: follow the pressure label and handbook supplied for your vehicle. If they disagree, or the label does not match the fitted tyres, ask a Jaecoo retailer to confirm the correct settings for your VIN and load before adjusting them.

Jump to a section

1. Finding the correct Jaecoo tyre pressure
2. How to check cold tyre pressures
3. Bar, psi and kPa conversion table
4. Why the dashboard pressure changes
5. What to do about a TPMS warning
6. Resetting TPMS and tyre replacement
7. Tyre condition, tread and running costs
8. A useful tyre-check record
9. Frequently asked questions

1. What tyre pressure should a Jaecoo have?

Open the driver's door and look around the door opening, B-pillar or sill for the tyre-pressure label. Read the units and the whole label, including any different front, rear and loaded settings. Photograph it so you have the information beside the pump.

The pressure moulded into the tyre sidewall is not the car's recommended setting. Likewise, a value from another owner's J7 does not establish the correct pressure for your car. TyreSafe explains how to find and use the manufacturer's recommendation.

Verified UK handbook examples

The following UK handbook tables specify these cold, unladen road-tyre pressures. They are useful reference examples, rather than instructions to override your car's label.

J8 size clarification: the handbook table includes both 19-inch and 20-inch tyre sizes. The current UK J8 specification lists 245/50 R20 for both Luxury and Executive. Check the tyre actually fitted and the approved specification for your vehicle when ordering a replacement.

230 kPa is approximately 33.4 psi, whereas, 260 kPa is approximately 37.7 psi. For J5 petrol, see printed page 230 (PDF page 240), or E5 Electric, see printed page 253 (PDF page 265). The other tables appear on printed page 255 (PDF page 265) of the J7 petrol manual, printed page 259 (PDF page 271) of the J7 PHEV manual and printed page 289 (PDF page 303) of the J8 manual. Find the document for your vehicle in the official Jaecoo download centre.

These rows do not establish a setting for a J7 Hybrid or a fully loaded car. Use the applicable label and handbook. A temporary spare, if fitted, also has its own pressure and operating restrictions. You should not copy the road-tyre setting onto it.

2. How to check Jaecoo tyre pressures properly

Make it a weekly check before a journey, while the tyres are cold, following the Highway Code's maintenance guidance. Also check before a long trip or carrying a heavier load, and always ensure to investigate any warning or suspected loss.

The best time to check your tyres is when they are cold. Checking the tyres at home after the car has been parked overnight is a practical place to start. Your handbook will define 'cold' tyres and you should follow that because even a short drive and direct sunshine can make readings less comparable.

1. Read the label: Note the correct front and rear pressures for the fitted tyres and load. Check whether the pump uses bar, psi or kPa.
2. Look at the tyres first: Check for an apparent flat, cuts, bulges or other damage. If you suspect damage, get professional help before inflating it.
3. Measure all four tyres: Remove each valve cap and seat an accurate gauge firmly on the valve. Repeat an unexpected result.
4. Adjust sound tyres to the specified cold pressures: Recheck with the gauge after adding air and refit the valve caps. Check a spare separately where fitted.
5. Record a recurring problem. If one tyre keeps losing pressure, have the tyre, valve and wheel inspected rather than repeatedly topping it up.

Using the same reliable gauge makes repeat checks easier to compare. Different instruments can give different readings so a disagreement is a reason to verify the measurement. See Michelin's pressure-checking advice.

After a drive: pressure normally rises as a tyre warms. Do not release air simply to bring a warm reading down to the cold figure. Re-check when the tyres are cold instead. If a warning appears while the tyres are warm, stop safely and assess it instead of leaving a suspected problem until the next morning. Michelin explains cold and warm inflation checks.

3. Bar, psi and kPa conversion table

Your car, gauge and air pump may use different units. Use this quick lookup table to translate common pressures you have read from a label or measured with a gauge.

These are unit equivalents, not recommended pressures for your car. Read your own label first, then look across the matching row. Psi is rounded to one decimal place.

One bar equals 100 kPa and approximately 14.504 psi. A difference of 0.1 bar is approximately 1.45 psi. The table shows equivalent units but it cannot tell whether a tyre is correctly inflated or safe.

4. Why does the pressure change from 2.5 to 2.4 bar?

A one-step change on the display does not, by itself, diagnose a fault. Temperature, the timing of a sensor update, the display's precision and a difference between measuring instruments can all affect what you see. Air loss is another possibility.

A reading displayed to one decimal place cannot show every small change. That helps explain why the number may move in steps, but it does not prove that a particular change is just rounding. Compare cold gauge readings over time and investigate a tyre that repeatedly loses pressure.

Cold mornings and driving

Colder weather lowers tyre pressure whereas driving and warmer conditions can raise it. Continental gives an illustrative drop of around 0.07–0.14 bar for a 10°C fall in temperature. That explains why a cold morning can reveal a low-pressure warning, but it is not a formula for choosing a new target. Recheck against the vehicle's cold recommendation. Read Continental's winter-pressure explanation.

If several tyres fall together after a temperature change, check them all. If one corner repeatedly falls more than the others, ask a professional to look for a leak. Neither pattern establishes the cause without a check.

Why the dashboard may not match the pump immediately

The J7 handbooks describe driving conditions for TPMS updates and warning clearance. A reading may therefore take time to refresh after inflation. Check the actual pressure with a gauge first because adding extra air solely to make an old dashboard number change can leave the tyre incorrectly inflated.

5. Jaecoo tyre pressure warning: what to do

TPMS means Tyre Pressure Monitoring System. It helps alert you to a problem, but it cannot replace checks of pressure, tread and tyre condition. A light or message deserves investigation, even if the car feels normal.

If the tyre is flat, visibly damaged, losing air rapidly or the car's handling changes: stop as soon as it is safe and arrange assistance. Do not drive to try to clear the warning or repeatedly inflate a damaged tyre. Michelin explains the risks of a flat or damaged tyre.

When safely parked, note the exact message, identify any highlighted wheel, inspect the tyres and check all four with a gauge. Compare the results with the label for the current load. A correct pressure reading does not rule out damage or a TPMS fault.

The J7 PHEV handbook distinguishes low pressure, high temperature and missing-sensor-signal warnings. The light alone is not enough to identify which applies. See its TPMS section, printed pages 174–176 (PDF pages 186–188), and TyreSafe's explanation of TPMS.

On a motorway, do not attempt repairs beside moving traffic. Follow National Highways' breakdown guidance and contact your existing assistance provider. If you cannot reach a place of relative safety or safely get out, keep seatbelts and hazard lights on and call 999 for police help.

Our J7 warning-beeps guide helps distinguish other alerts. Deal with the tyre warning's cause before changing notification settings.

6. Does Jaecoo TPMS need resetting?

Use the procedure for your exact model. A low-pressure warning and a sensor-learning procedure are different tasks. Never set a new baseline or clear an alert while the tyres are incorrectly inflated.

The cited J7 petrol and J7 PHEV manuals describe automatic low-pressure warning clearance after correction and a period of driving at the specified speed. The J8 procedure has different driving conditions. There is no single reset-button sequence that this guide can apply to every Jaecoo, and no guaranteed distance before an alert disappears.

Only follow a driving-based refresh procedure after the pressures and condition have been checked and the car is safe to move. Do not drive on a suspected flat or damaged tyre to make the light go out. For J5, E5 and J7 Hybrid models, use their own handbook rather than copying the J7 PHEV process.

After a tyre, wheel or sensor is replaced

Tell the fitter the car has TPMS. Depending on the system fitted and the work performed, a valve service, compatible sensor, programming or relearning may be required. Ask them to confirm correct readings and warning operation before returning the vehicle. The official manuals and a suitably equipped fitter are the starting points.

Do not raise the pressure above the vehicle's recommendation just to extinguish a warning. A factory reset of the infotainment system is also not a tyre repair. Our Jaecoo settings guide covers display units and why controls vary between models and software versions.

7. Pressure is only part of tyre care

For cars in Great Britain, the minimum tread depth is 1.6 mm across the central three-quarters of the tread width, around the entire circumference. Check several positions and look for damage as well as wear. TPMS cannot measure tread depth or certify that a tyre is roadworthy. See the Highway Code's tyre requirements.

Replacement tyres

Before ordering a replacement, photograph the full sidewall marking and ask the fitter to confirm the approved size, load index, speed rating and any reinforced specification for your vehicle. Matching a size such as 235/50 R19 alone does not establish suitability. Michelin explains the tyre markings.

Check your spare or repair kit before you need it

Check the equipment actually supplied with your car rather than assuming it has a spare wheel. The cited J5, E5, J7 PHEV and J8 manuals describe tyre-repair liquid. The petrol J7 handbook separately lists a temporary spare. Equipment can vary, so inspect your own boot and read the correct instructions.

If you have a repair kit, check that it is complete and that the sealant is in date. It is a temporary measure and cannot deal with every type of damage. If you have a temporary spare, follow its own pressure and operating restrictions. Ask a tyre professional or your assistance provider when you are unsure.

Correct pressure also matters to tyre wear and energy use. Keep the specified pressure rather than over inflating in pursuit of extra MPG or electric range. To budget using your own actual economy, try our fuel cost calculator or PHEV running cost calculator, neither diagnoses tyre problems.

For wider maintenance planning, our MOT checker shows the information available for your vehicle. An MOT date or previous pass does not replace today's tyre checks.

8. Keep a simple tyre-check record

Save a photo of the pressure label and complete sidewall markings. When checking a recurring problem, add the date, mileage, whether the tyres were cold, and the gauge used. A phone note like this makes a later conversation with a fitter more useful:

Add any warning message, visible damage and how long it took for a pressure loss to recur. The record supports an inspection, it does not replace one.

9. Frequently asked questions

Before a future trip, check which roadside assistance you already have and what it covers. If you need to compare future cover, our breakdown comparison page explains the service. Buying a new policy is not a way to obtain help for a fault that has already happened. We may receive a fee for introductions through that page.

Sources and information checked

Checked on 3 November 2026. Model-specific examples use the UK J5 petrol handbook T13JRHDOM26ENUK01 (January 2026), E5 handbook T13JBEVRHDOM26ENUK01 (March 2026), J7 petrol handbook T1EJRHDOM25ENUK01 (July 2025), J7 PHEV handbook T1EJPHEVRHDOM24ENUK01 (October 2024), and J8 handbook T26PHEVRHDOM25ENUK01 (December 2025), available from the official Jaecoo download centre. Relevant sections are linked above.

General checking and safety guidance: TyreSafe pressure checks, TyreSafe TPMS, Michelin's checking and inflation guides, Continental winter pressures, the Highway Code and National Highways. Unit conversion uses 1 bar = 100 kPa and 1 psi ≈ 6.894757293 kPa, consistent with NIST conversion factors.

MyJaecoo is an independent retailer, not Jaecoo or a vehicle repairer. This guide supports everyday owner checks - use your vehicle's current instructions and professional inspection where needed.