Sensor on the Dash

[denzo]

Hi,

I took delivery of my 2004 Vectra Hatch 1.9CDTi [150bhp] Elite in Silver Lightening today ....

I have swopped the rear wheels for the front ones

I saw that replacement 215/50 R17 91W Tyres were very expensive, would the alternative 225/50 R17 affect the speedo if I changed to them?

I have a sensor on my dash by my windscreen, does anyone know what it does it is a hemisphere in shape?

Very impressed with the space inside the 'C' compared to the 'B' Vectra

Had to transfer the grub security screws from my CDR 500 to my CCr 2006 stereo though

The car goes like a rocket.

How do I see what service plan it has? flex or annual service? is the annual service 1 year or 15,000 miles? Vx have quoted $145 for this

Thanks

[Brake buster]

the new tyre choice wouldnt contribute a noticable change in sppedo readings from the original ones,

he sensor on the dash is likley to be the auto headlight sensor, for turning em on when it gets dark if you have selected the option in the car

hope this helps
BB

[Bainie]

225/50x17`s are also recommended by vauxhall as standard fit, the difference is so small you wouldn`t notice, when your 215`s wear 2mm they are the same size ! They are a cheaper option though as they are fitted to more cars.

[leeds vectra]

Is the dash sensor not for climate control??

Paul.

[ian_c]

Is the dash sensor not for climate control??

Paul.

i think pauls hit it on the haed but andyvec had an elite and he will tell you

[Andy]

its the sun sensor for the auto climate control.

as for swapping tyres front to back. It seems like a good idea for getting more miles out of your tyres but it has a more dangerous bad point.

Top gear did a feature on this a year or so ago. They did what everyone else does and fit new tyres to the front. They them took the car on a wet test track. Nothing but uncontrollable oversteer, the kind that just snaps mid bend leaving you in the hedge. The reason, you have no grip on the back.

Now, they tried it with new tyres on the back. This time they got understeer, but as all know, its a lot easier to control than snap oversteer.

Hence they came to the conclusion, that the rear tyres were more important on a front wheel drive car than the fronts.

In the end, all youre going to end up doing is having to buy 4 worn out tyres in a year, instead of 2 tyres now. Was it Network Q? they are meant to change tyres if they have less than twice the legal limit on.