New to the MG4

[CuriousIslander]

Tyre pressure indications don't change until you've driven about 0.5 mile, so they might show as OK at first but might not actually be OK. Always worth checking/setting the pressures using a compressor and manual pressure gauge.

Could be just cold weather... the tyre pressure monitor on my Mg4 Trophy occasionally says that pressures are too low in the early morning when we have a sharp frost (scraping ice off the winsdscreen weather). I normally set my tyre pressures to 37psi, (255kPA) and in warmer weather this is always fine. However, in the colder weather we have been experiencing in the last few days, tyre pressure seems to drop to about 35psi in the cold mornings, and once the pressure warning light came on on a day that started off at around 0 degrees. Once the day had warmed up and the tyres had warmed up a little everything was back to normal. Maybe I should anticipate this happening in colder weather and set my tyres to 38 rather than 37psi as the majority of my journeys are only about 9 miles as I drive round the Isle of Wight.

 

[Kenno]

Could be just cold weather... the tyre pressure monitor on my Mg4 Trophy occasionally says that pressures are too low in the early morning when we have a sharp frost (scraping ice off the winsdscreen weather). I normally set my tyre pressures to 37psi, (255kPA) and in warmer weather this is always fine. However, in the colder weather we have been experiencing in the last few days, tyre pressure seems to drop to about 35psi in the cold mornings, and once the pressure warning light came on on a day that started off at around 0 degrees. Once the day had warmed up and the tyres had warmed up a little everything was back to normal. Maybe I should anticipate this happening in colder weather and set my tyres to 38 rather than 37psi as the majority of my journeys are only about 9 miles as I drive round the Isle of Wight.

I think you have answered your own question! With 18 inch wheels / Bridgestone tyres I find I can feel 40 psi (which the tyre place inflated them to when doing a realignment/balance/rotate), but 39 psi doesn't feel much different to 37 or 38. Slightly higher is not enough to impact tyre wear and helps keep the tyre form in heavy braking + will prevent the warnings when it's cold. So I would recommend 38 to 39