Just visited the local tyre garage to have 2 punctures fixed, ( well, 1 nail and 1 rim leak ).

When they fitted the tyres back onto the car I asked what pressure they had put in, it was 33psi, according to the chart on the end of the drivers side dash panel it should be 40psi front and 35psi rear for 18" rims, is this correct as it seems quite high.

Hi Steve,

According to my research, those are the correct figures for the 18" rims. 

http://www.tyre-pressure.co.uk/jaguar/x-type

Regards,  Trevor - Admin

I guess it must depend upon model as well as tyre size, this is my dash panel pressure table (2.0d) with more options to the above ...

From what I have found, it depends on what speed you are going to do. The recommendation is if you are going over 100 mph, then front tyres on 17 inch wheels should be at 38psi and rear at 35 psi. If it is below that, then 33 psi all round is recommended. One should also take loading into account. I have a 2.2 diesel estate, and if I am carrying heavy stuff I tend to increase the rear tyre pressure by a couple of psi to compensate. Hope this helps. Most important - each pair of tyres at same pressure.