NHTSA lists 2 safety recalls and 270 owner complaints for the 2003 Toyota Highlander. Most complaints involve engine and engine cooling (48) and engine (42). The EPA rates it 18–22 mpg combined.
CERTAIN SPORT UTILITY VEHICLES HAVE A CHILD PROTECTION LOCK (CPL) SYSTEM ON BOTH OF THE REAR SIDE DOORS. WHEN AN OPERATOR OF THE VEHICLE CLOSES THE DOOR VERY HARD WITH THE CPL LEVER SET TO THE LOCK POSITION, THERE IS A POSSIBILITY THAT THE LEVER MAY CONTACT THE BODY PANEL, CAUSING THE CPL LEVER TO MOVE INTO THE UNLOCK POSITION.
ON CERTAIN SPORT UTILITY VEHICLES EQUIPPED WITH FIVE FACTORY ALLOY WHEELS (MODEL 6934 AND 6936), WITH FACTORY LLAT, AND WITH PORT INSTALLED WR4, FOUR ALLOY WHEEL UPGRADE PROCESSED AT THE JACKSONVILLE, FLORIDA PORT AND DISTRIBUTED BY SOUTHEAST TOYOTA DISTRIBUTORS IN THE STATES OF ALABAMA, FLORIDA, GEORGIA, NORTH AND SOUTH CAROLINA, WHEN THE VEHICLES WERE PROCESSED AT THE PORT, AN ALLOY TIRE/WHEEL UPGRADE WAS INSTALLED. THE UPGRADE INCLUDED 4 ALLOY WHEELS. THE ORIGINAL SPARE TIRE/ALLOY WHEEL WAS NOT CHANGED. THE SPARE TIRE REQUIRES THE USE OF A DIFFERENT STYLE OF WHEEL NUT TO ATTACH IT TO THE VEHICLE.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Complaints for each Highlander model year we’ve synced.
| Model year | NHTSA complaints |
|---|---|
| 2001 | 136 |
| 2002 | 327 |
| 2003 | 270 |
| 2004 | 286 |
| 2005 | 225 |
| 2006 | 278 |
| 2007 | 124 |
| 2008 | 406 |
| 2009 | 134 |
| 2010 | 238 |
| 2011 | 187 |
| 2012 | 191 |
| 2013 | 212 |
| 2014 | 138 |
| 2015 | 193 |
| 2016 | 111 |
| 2017 | 271 |
| 2018 | 273 |
| 2019 | 508 |
| 2020 | 323 |
| 2021 | 535 |
| 2022 | 266 |
| 2023 | 189 |
| 2024 | 43 |
| 2025 | 10 |
“2003 TOYOTA HIGHLANDER (4 CYL. ENGINE) DEVELOPED A COOLANT LEAK. VEHICLE WAS TAKEN TO DEALERSHIP WHO ADVISED THE WATER PUMP WAS LEAKING. WATER PUMP WAS REPLACED AT A COST OF $600. VEHICLE WAS DRIVEN HOME AND IMMEDIATELY FOUND TO STILL HAVE A COOLANT LEAK. DEALERSHIP WAS CONTACTED AND OWNER ADVISED TO BRING THE VEHICLE BACK. DEALERSHIP CHECKED AND ADVISED THAT CYLINDER HEAD BOLTS WERE STRIPPED OUT AND THAT ENGINE WOULD HAVE TO BE REPLACED AT A COST OF $5400. THE ENGINE NEVER LOST ENOUGH COOLANT TO OVERHEAT BUT THE ONLY REPAIR OPTION GIVEN BY THE SERVICE MANAGER WAS TO REPLACE THE ENTIRE ENGINE RATHER THAN REPLACING THE HEAD GASKET AND REPAIRING THE STRIPPED OUT THREADS TO HEAD BOLTS. SERVICE MANAGER SLIPPED UP BY SAYING THIS IS A DEFECT IN THE ENGINE BUT WHEN QUESTIONED FURTHER ABOUT THE PROBLEM HE STATED HE ONLY SEES IT "ONCE IN A BLUE MOON". THIS SEEMS TO BE A CONTRADICTION TO ALL THE OTHER SIMILAR COMPLAINTS FOR THIS 4 CYLINDER ENGINE. TOYOTA ISSUED A SERVICE BULLETIN MARCH 2, 2011 FOR THE HIGHLANDER, RAV4, CAMRY, AND SOLARA WHICH STATES: THERE MAY BE DAMAGED CYLINDER HEAD BOLTS. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHO STATED HE HAS SEEN THIS PROBLEM…”
“Automatically disengage the transmission Stopped the road Icalled my husband Myhusband came and together we got the car to a safe place.Then Icame home with my husband and he called the insurance company and had the car towed. Ifound a place to fix the car and they said the transmission was broken and it cost about 6500 dollars.Icontacted the insurance company said they couldn’t help.The car was towed home and is not available.”
“TL* THE CONTACT OWNS A 2003 TOYOTA HIGHLANDER. WHILE DRIVING 20 MPH, THE VEHICLE UNINTENTIONALLY ACCELERATED AT HIGH SPEEDS WITHOUT WARNING. THE CONTACT WAS ABLE TO BRING THE VEHICLE TO A COMPLETE STOP AND TURN OFF THE ENGINE. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIRS. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 185,000.”
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 |
|---|---|---|---|---|---|
| Highlander 2WD Auto 4-spd, 4 cyl, 2.4 L · Front-Wheel Drive | 19 | 25 | 22 | $2,900 | 404 |
| Highlander 4WD Auto 4-spd, 4 cyl, 2.4 L · 4-Wheel or All-Wheel Drive | 17 | 22 | 19 | $3,400 | 468 |
| Highlander 2WD Auto 4-spd, 6 cyl, 3.0 L · Front-Wheel Drive | 17 | 21 | 18 | $3,550 | 494 |
| Highlander 4WD Auto 4-spd, 6 cyl, 3.0 L · 4-Wheel or All-Wheel Drive | 16 | 21 | 18 | $3,550 | 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 |
2 safety recalls as of Oct 27, 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 270 complaints with NHTSA. The most-cited components are engine and engine cooling (48), engine (42), vehicle speed control (31). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2003 Toyota Highlander at 18–22 mpg combined, depending on engine and drivetrain (4 versions rated).