My car is the same age + milage and I'll be giving it a major service this weekend with bits supplied by ZMANALEX (best prices and service! ). A P3 is basically a oil + filter and air filter change with some 'inspections' thrown in. For peace of mind I'll be doing additional bits as there's no evidence in my service book that other fluids have ever been changed.
Alex supplied Denso Iridium spark plugs, Motul 8100 oil and Nissan oil filter, genuine Nissan gearbox oil with Molyslip additive,rear diff fluid, and coolant for a flush and some Motul RBF 600 brake fluid (I'm also changing the brake lines to HEL braided hoses). I have HKS panel filters so don't need to replace them.
If it's never had a P3 I'd go for an oil + filter/air filter change and spark plugs as a minimum at that age and milage, but it's recommended that the gearbox and diff fluids are also changed at this sort of time. Brake fluid should be done every two years or 27k, coolant every three years or 36k, plugs every five years or 45k and oil every year or 9k.