2005 Scion xB Q&A
2005 Scion xB Question: When should I tune up my XB?
The manufacturer's recommended maintenance schedule is what you need to follow, and you can find that in your glove box, or on RepairPal in the Estimator: http://repairpal.com/estimator One thing to remember is that what maintenance is needed depends on what has been done in the past, so if you have a service history, that will help. It's relatively unlikely that a regular maintenance will clear up the rough idle. - matte
If you mean spark plugs, every 30,000 miles. They are not plat or double plat. The plugs are just regular plugs. Is the check engine light on? If not, then a good EFI service will work. That's if you don't have a vac leak, bad coil/coils or ? - backyard tech
It's our practice here at a Scion only shop to replace the reg plugs with NGK irudiums for better idle and longer tune up intervals. - scvscions