2003 Toyota Highlander Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Toyota Highlander
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2003 Toyota Highlander ProblemsIgnition Coil May Fail After 100,000 Miles
On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
The Check Engine Light may illuminate because a component of the oxygen sensor stops working. As a result the engine computer is unable to determine the proper ratio of air to fuel for the engine. Replacing the failed oxygen sensor should correct this concern.
A problematic center airbag sensor can cause the airbag malfunction light to illuminate.
2003 Toyota Highlander QuestionsAll O2 sensors were changed but check engine light is still present (2 answers)
I changed all of the o2 sensors on Highlander but check engine light is still present. b1s1 which was the first changed. B1s2 was third changed and no code showning now. But b1s1 Appears again. No hoses are off and has been reset several times by battery as well this code device and after a few s...
Changed out all bulbs still can't get the drivers side break light to come on.
read fluid leaking under engine
2003 Toyota Highlander RecallsRecall 04V181000
Toyota has recalled certain 2003 4Runner and Highlander trucks because the lug nuts used for upgraded alloy wheels are not suitable for the spare tire and wheel. If the existing lugs are used, the spare tire may loosen and come off. Dealers will provide owners with newly designed lug nuts, a warning label for the spare wheel, and an owner's manual addendum.