Thanks for your prompt reply. I shall ask the dealer if his mechanics have tried this and see what his response is.
Hopefully it will rectify the problem before the MOT starts checking speedo's as well!!
Thanks again for your assistance.
Hi Brian, Just dropped my car off for a service and investigation of the sensor. I will advise you of the outcome as soon as I've road-tested it!!
Brian, Just to update you - despite cleaning up and liberally lubricating the existing sensor, it has refused to budge. So,will run the car for a week and see if problem resolves itself now sensor has been cleaned, then try to remove it again. Mechanics didn't want to force the sensor in case it snapped and possibly create a more expensive repair.
I'll see how speedo reacts over next 7 days and refer back to garage.
Then I'll update you as to the outcome.
Thanks Brian, I'll pass this on to the garage when I take the car in again next week.
I do not appear to have updated you with regard to my problem with my speedo.
I am very pleased to inform you that the lubrication and the manhandling which the sensor received from the mechanics seems to have done the trick and the speedo has been working properly since last month.
I am very grateful for your advice in resolving this ongoing problem and I apologise for not contacting you earlier to let you know about it.