2003 LEXUS RX300 VEHICLE STALLED. REPLACE IDLE AIR CONTROL VALVE TWICE**CW** THE CONSUMER ALSO REFERENCED A TOYOTA HIGHLANDER THAT HAD THE SAME STALLING ISSUE. *JB
2003 Lexus RX300
Owner reports · Recalls · Investigations
Fewer warning signs than most model years
Owner complaints for the 2003 Lexus RX300 are lower than the model-year median of 88.
About this comparison →How this year compares
Owner complaints by model year
Compare all RX300 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 19 of 25 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Power Train. Review the 7 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Air Bags. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
3 reportsTHIS COMPLAINT IS ALMOST IDENTICAL TO OTHERS I HAVE FOUND AND IS VERY SERIOUS. PURCHASED 2003 LEXUS RX300 FROM A TOYOTA DEALERSHIP; APPROXIMATELY 57000 MILES NOW, ABOUT 56000 AT PURCHASE. CAR CHECKED BY DEALERSHIP, OK. NO HARD DRIVING. AFTER FIRST DISTANCE TRIP (ST. LOUIS TO KC) CHECK OIL LIGHT AND CHECK ENGINE LIGHT CAME ON. …
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THIS COMPLAINT IS ALMOST IDENTICAL TO OTHERS I HAVE FOUND AND IS VERY SERIOUS. PURCHASED 2003 LEXUS RX300 FROM A TOYOTA DEALERSHIP; APPROXIMATELY 57000 MILES NOW, ABOUT 56000 AT PURCHASE. CAR CHECKED BY DEALERSHIP, OK. NO HARD DRIVING. AFTER FIRST DISTANCE TRIP (ST. LOUIS TO KC) CHECK OIL LIGHT AND CHECK ENGINE LIGHT CAME ON. TOWED TO LEXUS DEALER WHO KNEW RIGHT WHERE TO LOOK. FOUND GELLED SLUDGE ALL THROUGH AND SAID IT WAS MISUSE. COMPLETE LIE. SAID ENGINE MUST BE REPLACED. NO HELP SO FAR FROM LEXUS. EXPECT TO SEE IF THIS IS HIDDEN DEFECT IN ENGINE, SINCE I HAVE FOUND NUMEROUS OTHER COMPLAINTS ON THE INTERNET THAT READ ALMOST EXACTLY THE SAME.
WHILE TRAVELING OUT TO DENVER FROM OMAHA, RECEIVED LOW OIL PRESSURE LIGHT ON MY 2003 LEXUS RX300. PULLED OVER IMMEDIATELY, HAD CAR TOWED TO LEXUS DEALERSHIP. THEY IMMEDIATELY KNEW WHAT TO LOOK FOR AND SAY..THE CAR HAS BEEN MISUSED, (NO OIL CHANGES) AND OIL GELLING WAS RESULT. WITHIN MINUTES THEY SAID THE ENGINE WAS SHOT AND WOUL…
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WHILE TRAVELING OUT TO DENVER FROM OMAHA, RECEIVED LOW OIL PRESSURE LIGHT ON MY 2003 LEXUS RX300. PULLED OVER IMMEDIATELY, HAD CAR TOWED TO LEXUS DEALERSHIP. THEY IMMEDIATELY KNEW WHAT TO LOOK FOR AND SAY..THE CAR HAS BEEN MISUSED, (NO OIL CHANGES) AND OIL GELLING WAS RESULT. WITHIN MINUTES THEY SAID THE ENGINE WAS SHOT AND WOULD REQUIRE NEW ENGINE. THEY SHOWED ME THE SLUDGE WHICH WAS ONLY FOUND ON ONE CYLINDER HEAD, BY THE OIL RETURN LINE. QUANTITY WAS ABOUT ONE HANDFUL AND AS STATED, ONLY NEAR THE RETURN LINE, REMAINDER OF HEAD CLEAN. I HAD CHANGED OIL NIGHT BEFORE TRIP. THEY WILL NOT HONOR POWER TRAIN WARRANTY, SINCE I CANNOT PROVE OIL WAS CHANGED EVERY 7500 MILES. CAR HAS 50,000, AND I PURCHASED CAR FROM INDIVIDUAL WHO STATED HE ALWAYS MAINTAINED CAR BUT CANNOT PROVE WITH RECEIPTS. CALLED CUSTOMER SATISFACTION LINE WHO SAID UNLESS I PROVE THE ORIGINAL OWNER HAD OIL CHANGED THEY WOULD NOT HONOR. DEALERSHIP HAD STATED TODAY THAT ONLY ONE HEAD IS DAMAGED, THE OTHER IS FINE. SHORT BLOCK WILL REQUIRE REPLACEMENT AS WELL. IF IT WAS AN OIL CHANGE ISSUE WOULDN'T THE SLUDGE BE IN BOTH HEADS AND WHY WAS THE SLUDGE ONLY FOUND IN ONE SMALL SECTION OF HEAD, BY OIL RETURN LINE. IF THIS WERE A LACK OF MAINTENANCE, SLUDGE SHOULD BE EVERYWHERE (BOTH HEADS) NOT JUST ONE AREA...LEXUS STATED IT IS MY FAULT AND THEY DO NOT HAVE A DESIGN ISSUE WITH THIS V-6 ALTHOUGH I HAVE NEVER SEEN OIL GEL LIKE THIS...REGARDLESS OF MAINTENANCE HISTORY. LEXUS REPUTATION IS BIG JOKE IF THEIR ENGINES CAN'T MAKE IT 50,000 MILES. *NM
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0No exact-year investigations in this snapshot.
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