I believe you can bring in a car up to 5 years old. I'm not sure when they start counting, ie. by model year or by date of the car manufacture or by another method. Very hard to find any written regulations, but that's the GCC for you.

Yes, much better deals in Dubai especially in the next few weeks and months as all the redundant expats leave as school gets out. You could always ship it from Dubai or Abu Dhabi versus dealing with the Saudis.