2003 Lexus RX300 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 2003 Lexus RX300
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2003 Lexus RX300 ProblemsDebris in Idle Air Control Valve May Cause Engine Problems
Debris can get into the idle air control valve. This will restrict the air flow into the engine, causing idle speed and/or stalling when cold. The valve can be cleaned or replaced to correct this concern.
The Check Engine Light may illuminate because the mass air flow sensor sends incorrect information to the engine control computer. This can cause a loss of power on acceleration. A failed mass air flow sensor will require replacement.
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.
2003 Lexus RX300 QuestionsI needed a jump start. I opened the hood normally but now it won't close. (1 answer)
The main hood latch won't catch.