Open the bonnet and look at the brake fluid reservoir If it has two pipes goin in on the left as you look at it the car has ABS if not it doesn't (Whether it came with it or not is another matter). Also look to the left and down of the brake master cylinder and look for something that looks a little like a drum these are the ABS modulators. If you can't see these look down at the driveshaft and see if it has a teethed section to it (this is where the belt runs from to the modulator.