NHTSA lists 3 safety recalls and 30 owner complaints for the 2003 Lexus RX300. Most complaints involve power train (7) and vehicle speed control (6). The EPA rates it 18 mpg combined.
POLYMER PROCESS DEVELOPMENT IS RECALLING 931 UNITS OF BACK GLASS, P/NO. FB20415ZPY, SOLD AS REPLACEMENT EQUIPMENT FOR USE ON 1999-2004 LEXUS RX300 VEHICLES. THE GLASS FAILS TO CONFORM TO THE AUTOMOTIVE GLAZING MATERIAL REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 205, GLAZING MATERIALS.
CERTAIN CK MOTORSPORTS COMBINATION HEADLIGHTS, CLEAR CORNER, BUMPER, AND SIDE MARKER LIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON THE PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
CERTAIN PRO-A MOTORS CORNER LAMPS, TURN SIGNALS, AND HEADLIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON CERTAIN PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“DURING NORMAL DRIVING, WITH NO SIGNS OF FAILURE, THE VEHICLE SUDDENLY WOULD LOSE POWER WHEN PRESSED ON GAS, IT ACTED AS IF IT WERE IN NEUTRAL---ENGINE REVS UP, BUT CAR DOES NOT MOVE. THEN WHEN SWITCHED TO SECOND GEAR OR L, TRANSMISSION STILL WOULD NOT ENGAGE. HAD IT TOWED TO A LOCAL TRANSMISSION SHOP, IT TURNED OUT TO BE THE PLANETARY GEAR BROKE. SEARCHED ONLINE LEXUS FORUM, FOUND OUT VERY MANY PEOPLE REPORTED THE SAME FAILURE IN TRANSMISSION. *TR”
“AS I WAS DRIVING THE CAR STARTED TO SPEED UP UNCONTROLLABLY AND WOULD NOT SLOW DOWN EVEN WITH THE BRAKES APPLIED. I HAD TO PUT IT INTO NEUTRAL TO APPLY THE BRAKES BUT WE WENT FROM 45 - 85MPH IN A MATTER OF SECONDS WHILE DRIVING IN 45MPH ZONE IN THE INNER CITY. WHEN I TURNED THE CAR BACK ON WHILE IN PARK THE ACCELERATOR WAS STILL STUCK UP TO 100MPH + SO IT WAS NOT DRIVABLE. WE FOUND OUT LATER FROM THE MECHANIC THAT THE THROTTLE WAS STICKY AND STUCK IN THE OPEN POSITION.”
“AIRBAG LIGHT STAYS ON WHEN CAR IS RUNNING AND WHEN I HAD IT CHECKED OUT THE MECHANIC SAID IT COULD INFLATE AT ANY TIME. DON'T HAVE THE MONEY IN BUDGET TO HAVE DONE RIGHT NOW.”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| RX 300 Auto 4-spd, 6 cyl, 3.0 L · Front-Wheel Drive | 17 | 21 | 18 | $3,450 | 494 |
| RX 300 4WD Auto 4-spd, 6 cyl, 3.0 L · 4-Wheel or All-Wheel Drive | 16 | 21 | 18 | $3,450 | 494 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
3 safety recalls as of Nov 10, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 30 complaints with NHTSA. The most-cited components are power train (7), vehicle speed control (6), air bags (4). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2003 Lexus RX300 at 18 mpg combined, depending on engine and drivetrain (2 versions rated).