Well, I ordered a replacement ABS sensor for my car from your site after entering my reg. It gives you two options against all sensors (Standard and premium), not stating the difference (if any) between them. I bought a "Standard" after market one which was then fitted to my car and proceeded not to work, which meant a return visit to the mechanics and a purchase of the "premium" sensor which then proceeded to work. Looks like the mechanic damaged the "Standard" getting it back off the car so there's no point me coming in for a refund on this item so I lose the money on that and my time for the return visit to the garage. Not impressed. If these white box "after market" sensors don't seem to work, why sell them?