Make sure to read and fully understand the following warnings. Failure to comply with the safety instructions could result in an accident, leading to serious injury or death.
Check the tyres, including the spare, for condition and pressure on a weekly basis and before long journeys.
All tyre pressures, including the spare, should be checked. Failure to properly maintain the tyre pressures could increase the risk of tyre failure.
The loading of the vehicle should always be considered when checking and adjusting the tyre pressures. Failure to do so may lead to a loss of control, potentially causing serious injury or death. See TYRE PRESSURE LABEL.
Always use a calibrated tyre pressure gauge. Using an un-calibrated tyre pressure gauge may result in tyres with incorrect pressures. Incorrect tyre pressure can lead to vehicle instability.
Never drive the vehicle if the tyre pressures are incorrect. Under-inflation causes excessive flexing and uneven tyre wear, which can lead to sudden tyre failure. Over-inflation causes harsh ride, uneven tyre wear and poor handling.
Under-inflation also reduces fuel efficiency and tyre tread life and may affect the vehicle’s handling and stopping ability.
If the tyre pressures are checked while the vehicle is inside a protected, covered area, e.g., a garage, and subsequently driven in lower outdoor temperatures, tyre under-inflation could occur.
A slight pressure loss occurs naturally with time. If this exceeds 0.14 bar (2 psi, 14 kPa) per week, have the cause investigated and rectified by qualified personnel.
Pressure checks should be carried out ideally when the tyres are cold, and the vehicle has been stationary for more than 3 hours. A hot tyre at, or below, the recommended cold inflation pressure, is dangerously under-inflated. Tyres can be hot after driving, if the vehicle has been parked in strong sunlight, or used in high ambient temperatures. Do not reduce the tyre pressures. Recheck the pressures when cold.
If the tyre pressures are checked when the tyres are warm, expect the pressures to have increased by up to 0.3 to 0.4 bar (4 to 6 psi, 30 to 40 kPa). If Tyre Pressure Monitoring System (TPMS) advised pressures are not available in the instrument panel, allow the tyres to cool fully before adjusting the pressures.
For vehicles with TPMS, it is possible to adjust the pressure of a warm tyre, providing the advised pressures are used. See TYRE PRESSURE CHECK.