Hi John, a good battery is essential to the electronic well-being of these cars, so a changing of the battery for what may turn out to be spurious indications on the dash is a good first step, especially when you are unsure of the age of the battery. The Yuasa is a great battery, just be sure to get the version that fits and suits your car. By that I mean ensure the dimensions are correct to fit in the battery tray / box, and that the power (Ah) is of the correct rating.
Once you have the new battery in place, you may find the fault has cleared, but if not, then reading any stored codes should be the next step. A friendly local workshop with the correct tools should be able to help. This may through light on the follow-up steps, perhaps a faulty ABS sensor, but get any codes before changing other parts.
N6 JMX