Problems · NHTSA complaints
2003 Lexus IS300 problems
Owners filed 34 complaints about the 2003 Lexus IS300 with NHTSA between Aug 2002 and Jul 2024. The most-cited component is structure (12).
Complaints
34
Filed with NHTSA
Crashes
10
Reported by owners
Fires
1
Reported by owners
Injuries
8
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Structure12
- Air bags6
- Steering3
- Service brakes3
- Engine3
- Power train3
- Suspension2
- Electrical system2
- Vehicle speed control2
- Visibility/wiper1
- Electronic stability control (esc)1
- Tires1
- Engine and engine cooling1
- Other / unknown4
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 11, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
1
2
1
0
3
0
2
1
1
1
0
3
6
8
2
0
0
0
1
0
0
0
2
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2002 | 1 |
| 2003 | 2 |
| 2004 | 1 |
| 2005 | 0 |
| 2006 | 3 |
| 2007 | 0 |
| 2008 | 2 |
| 2009 | 1 |
| 2010 | 1 |
| 2011 | 1 |
| 2012 | 0 |
| 2013 | 3 |
| 2014 | 6 |
| 2015 | 8 |
| 2016 | 2 |
| 2017 | 0 |
| 2018 | 0 |
| 2019 | 0 |
| 2020 | 1 |
| 2021 | 0 |
| 2022 | 0 |
| 2023 | 0 |
| 2024 | 2 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Structure
12 reports1 crash
“THE DASHBOARD AND CENTER CONSOLE IS MELTING, LEAVING A STICKY & SHINY SURFACE MAKING IT HAZARDOUS TO DRIVE THE VEHICLE. A WARRANTY CAMPAIGN WAS ISSUED FOR SEVERAL OTHER LEXUS MODELS TO ADDRESS THIS VERY ISSUE, HOWEVER, THE 2003 IS300 WAS EXCLUDED. LEXUS COULD NOT PROVIDE A REASON AS TO WHY THIS EXACT DEFECT WAS NOT ADDRESSED FOR THE 2003 IS300 MODEL, SINCE THEY ADDRESSED THE VERY SAME ISSUE WITH AN OLDER 2003 GX470 MODEL. MY VEHICLE HAS BEEN GARAGE KEPT AND EXTREMELY WELL MAINTAINED, SO SUN EXPOSURE WAS MINIMAL AND STILL EXPERIENCING THE SAME ISSUE AS THOUSANDS OF OTHERS THAT HAVE COMPLAINED. THIS HAZARDOUS DEFECT HAS HINDERED ME FROM DRIVING MY VEHICLE IN FEAR OF LEAVING IT IN THE SUN TO FURTHER DETERIORATE CAUSING MORE DAMAGE AND RENDERING THE VEHICLE UNDRIVABLE.”
Air bags
6 reports5 crashes
“TL* THE CONTACT OWNED A 2003 LEXUS IS. THE CONTACT STATED THAT WHILE DRIVING AT 35 MPH, ANOTHER VEHICLE CRASH INTO THE CONTACTS VEHICLE HEAD ON AND THE AIR BAGS FAILED TO DEPLOY. AS A RESULT, THE CONTACT SUSTAINED HEAD, NECK AND LEFT SHOULDER INJURIES THAT REQUIRED MEDICAL ATTENTION. A POLICE REPORT WAS FILED. THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 130,000.”
Steering
3 reports1 crash
“Brand new owner - first owner; Car accelerated numerous times during ownership that caused harm to both my young son and I life. This IS250 Lexus was dangerous, unreliable, caused mental and emotional issues. Lexus was negligent in handling numerous issues and concerns related and has done nothing to compensate me for to date relating to multi-billion dollar law suits.”
Service brakes
3 reports2 crashes
“Brand new owner - first owner at time of lease/finance terms and conditions. Car accelerated numerous times during ownership that caused harm to both my young son and I life, placed us in harms way and accident occurred in California due to faulty emissions, acceleration out of control, and braking problems. This Lexus was dangerous, unreliable, caused mental and emotional issue coupled with anxiety. Lexus was negligent in handling numerous issues and concerns reported to dealership and has done nothing to compensate me for their multibillion dollar settlement to date. I need compensation of torment, poor performance, lemon laws associated and punitive damages, hereto. What are next steps? Sincerely, [XXX]”
Engine
3 reports2 crashes
“MY CAR HAS 51000 MILES ON IT AND I'M TOLD MY ALTERNATOR SHOULD BE REPLACED. I TOOK MY CAR FOR ONE THINGS AND THE DEALERSHIP FOUND 4 DIFFERENT ISSUES WHICH 2 OF THE ISSUES I AM AWARE OF. GRANT YOU ALL THE PARTS IN MY CAR ARE THE ORIGINAL PARTS. I SERVICE MY CAR ACCORDING TO LEXUS 25,000 - 75,000 MILES SERVICES. HOW CAN I WELL KEPT AND SELDOM DRIVE VEHICLES HAVE AN ALTERNATOR ISSUE? ON FEBRUARY 7, 2003, THERE WAS COMPLAINTS OF THE (BULLETIN#:T10001308) CD BECOMING JAMMED IN CD CHANGER. IMPROVEMENTS WERE MADE TO THE IS 300 CD CHANGER MECHANISM BUT I WASN'T NOTIFIED. I TOOK MY CAR TO WESTSIDE LEXUS REGARDING AN ONGOING DASHBOARD MELTING SITUATION AND CD PLAYER ISSUE. LEXUS FINALLY AGREED TO REPLACED DASHBOARD AFTER 3 YEARS AND I AM GRATEFUL BUT THE CD CHANGER JAMS NOW. IF I HAVEN'T DONE MY RESEARCH I WOULDN'T KNOW THERE WAS INITIAL COMPLAINTS REGARDING THE CD CHANGER. OVER THE MONTH-TO-MONTH WEIRD CD SOUND OF TUMBLING THEN PLAYING IT PROGRESSIVELY GOTTEN WORSE. MY 5- DISC CD PLAYER WILL NOT PLAY CDS AT ALL AND SOUND IS CD TUMBLING AROUND IN THE PLAYER. WESTSIDE LEXUS STATED I NEEDED TO REPLACE THE CD PLAYER AT $500.00 AND I SHOULD NOT HAVE THE ISSUE AT ALL. I…”
Power train
3 reports2 crashes
“I WAS SITTING IN MY 2003 LEXUS IS 300 4 DOOR IT WAS A RAINY AND UNUSUALLY COOL DAY SO I ROLLED THE WINDOWS DOWN AND WITH THE CAR IDLING I LISTENED TO SOME MUSIC AND CONTEMPLATED WHERE TO EAT DINNER IT BEING AROUND 5.30 PM. SUDDENLY THE THROTTLE OPENED UP AND THE CAR SHOT OFF LIKE A ROCKET OVER THE CURBING THROUGH SOME BUSHES AND INTO A POND MAYBE 15 FEET AWAY THE CAR WAS MOVING SO FAST THAT AS IT WAS SINKING IT MOVED OUT ABOUT 20 FEET. IT WAS COMPLETELY SUBMERGED AND I WAS LUCKY TO UNBUCKLE THE SEAT BELT AND CLIMB OUT THE OPEN WINDOW AND SWIM TO SHORE THE ONLY INJURY A SPRAINED ANKLE. THE CAR WAS A TOTAL LOSS. AMAZINGLY I WAS GIVEN A TICKET FOR WRECKLESS DRIVING THAT WAS DISMISSED AS THERE WERE NO WITNESSES THE POLICE AND THE INSURANCE COMPANY INSISTED THAT CARS DON'T SURGE LIKE THAT ON THEIR OWN WE KNOW BETTER I WAS TREATED LIKE A CRIMINAL INSTEAD OF SYMPATHIZED WITH FOR ALMOST DROWNING. IT WAS NOT THE MAT OR A STICKY ACCELERATOR BUT I FEEL AN ELECTRICAL PROBLEM DUE TO MOISTURE THAT MADE THE THROTTLE OPEN UP THE THING WAS ALSO THAT THE CAR WAS IN PARK! OF COURSE NO LAWYERS WOULD TOUCH IT I DIDN'T GET HURT BAD AND THEY SAID THERE WAS NEVER ANY SUCCESSFUL…”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.