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Are oil leaks common with the 4Runner 5th gen?
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this is the 4th gen section, however the 5th gen uses the same engine as the 4th gen v6... no, leaks are not at all common on 4th or 5th gen v6. of course there can always be things that cause a leak like the OP's sensor on this thread or bad valve cover or other gaskets but in general these toyota engines are one of the best out there for no leaks. plenty of 4runners with 150-200k+9 miles running full synthetic oil & they are bone dry. but if you do happen to have a leak, find the cause & fix it.