I have a 2003 volvo s80 t6. Its due for a 150000 km service. I have changed the spark plugs and timing belt on the previous service. Will this be a major service? I am trying to save some money at the moment.
First of all, no matter the make type or price of the vehicle it is in its nature to break down hence having mechanics to fix them.
Keeping your car on a regular maintenance schedule can help prevent a minor problem from turning into a MAJOR problem!
Having 150 thousand clicks on you're 2003 Volvo is a high amount in its first 10 years of service.
If you have had it serviced every 5000Kms and major at least every 30 to 50 thousand then id advise another major one is due, however you are trying to save money in which having you're volvo serviced as much as every 5000Kms will benefit you, and you can just call it a day with one more 5000Kms untill you do the next major.
You mention you have already replaced the timing belt in the last service which is a major bonus and should not have to be done untill 300 thousand clicks.
Your auto advisor can research your vehicle and inform you of what needs to be done at your specific mileage if my information does not quite add up in you're mind.