My '98 S70 is quickly approaching 88,000. GREAT car. Have tried to do preventative maintenance. suspension coils, struts, plugs, done. replaced ABS module, lower arm control, ac pump so far. What else should be done before 90,000?

 

If all is working fine then you should be good.
90K is the major tune up service.
If the cap,rotor, and wires are original change them.
Has the fuel filter been done yet?

 

Make sure that the timing belt has been replaced along with all its components like the tensionors and the Idler Pully. I think that the timing belt for the 98 S70 is 70K miles. But I heard that the tensionors and the Idler pullys should be replaced at that time also because I have heard a lot of horror stories and how the tensionors and Idler pullys have failed even before 100K miles resulting in engine damage. So I would be careful about that.

 

Don't forget about mister tranny, fluid change too. I don't know the exact mileage specs on O2's, usually around 100k.

 

Sure hope a newtiming belt is on that list as it's WAY overdue