Lot of miles m8 they supplied mine and I had to pay labour but you got another 40k on yours end of the day they can only say no. Have you had your clutch done recently as a few post mention heavy handed mechanics could be causing this problem. When my vsa light came on i did not notice a diffrence in braking or driving as this will not fail a mot
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It will fail MOT from January 2012 they change some rules
http://www.newmot.co.uk/
"NEW MOT
The MOT test is set to change by January 2012 with the following POSSIBLE changes:
1) Dashboard Warning Lights
A car will fail an MOT tset if a dashboard warning light shows a problem such as Airbags, Electric Power Steering, Electonic stability sytem and additional restraint systems.
2) Electrical Wiring
The condition of a cars wiring will be inspected for damage (such as chaffing against the engine or through an ungrommeted hole etc), and it's security.
3) Car Battery Security
The battery will be checked for security. This should present few problems unless the wrong sized battery is fitted, the clamp is loose or corrosion has affected support or security of the battery.
4) Headlamp bulbs and unit incompatibilty and levelling devices.
The cars lighting system will be checked particularly for incorrect fitment of some aftermarket 'bright' bulb kits.
5) Management electronic control unit (ECU) modification.
It's not fuly understood how ECU systems will be checked as yet, but a car will in theory fail the MOT if it is found that it's ECU unit has been illegally modified or 'chipped'."