Windows, power locks, manual locks, doors, trunk, tailgate, mirrors, power and manual seat controls, seat belts, sunroof, convertible top, glass defects.
N/A
No major problem has been reported
Brake pads, brake rotors, brake calipers, anti-lock braking system (ABS), brake lines, brake master cylinder, brake booster, parking brake, brake sensors, regenerative braking system (if applicable).
The 2003 Toyota Highlander is generally known for its reliability, but one common issue that pops up is the airbag light coming on due to a problematic center airbag sensor. While this can be a bit of a hassle, it’s not a deal-breaker for most owners, as the fix is usually straightforward. Overall, the Highlander remains a solid choice for those looking for a dependable ride.
The 2003 Toyota Highlander is generally known for its reliability, but one common issue that pops up is the check engine light coming on due to a hose coming off the air filter housing. This problem is relatively minor and can be easily fixed, so it doesnt significantly impact the overall dependability of the vehicle. Most owners find that with regular maintenance, the Highlander remains a solid and trustworthy ride.
The 2003 Toyota Highlander is generally known for its reliability, but one common issue that pops up is the check engine light due to a failed oxygen sensor. While this problem can be a bit annoying, it’s usually not a major concern and can be fixed relatively easily. Overall, the Highlander remains a solid choice for those looking for a dependable ride.
The 2003 Toyota Highlander is generally known for its reliability, but one issue to keep an eye on is the ignition coil, which may start to fail after 100,000 miles. While this isn’t a deal-breaker, it’s something to be aware of as the vehicle ages. Regular maintenance and timely replacement can help keep your Highlander running smoothly.
The 2003 Toyota Highlander is generally known for its reliability, but one issue to watch out for is sludge buildup in the engine, which can happen if oil changes aren’t done regularly. This problem can lead to reduced engine performance and potentially costly repairs if not addressed. So, keeping up with regular oil changes is key to maintaining the Highlander’s overall reliability.
The 2003 Toyota Highlander is generally known for its reliability, but one common issue that pops up is the check engine light due to a failed EVAP purge control valve. This problem can be a bit of a hassle, as it might lead to increased emissions and affect fuel efficiency. However, once addressed, the Highlander tends to run smoothly, maintaining its reputation for being a dependable ride.
The 2003 Toyota Highlander is generally known for its reliability, but some owners have reported issues with rough idling and backfiring, often accompanied by the check engine light. These problems can be frustrating and might indicate issues with the ignition system or fuel delivery. While not extremely common, it’s something to keep an eye on if you’re considering this model.
The 2003 Toyota Highlander is generally known for its reliability, but some owners have reported issues with rough running conditions and smoke from the exhaust. These problems can be concerning, as they might indicate engine troubles or other mechanical issues that need attention. While not every Highlander from this year will experience these problems, it’s something to keep an eye on if you’re considering buying one or already own one.
The 2003 Toyota Highlander is generally known for its reliability, but some owners have reported issues with debris in the Idle Air Control Valve, which can lead to engine problems. While this isn’t a widespread issue, it’s something to keep an eye on if you’re experiencing rough idling or stalling. Regular maintenance and cleaning of the valve can help prevent these problems and keep your Highlander running smoothly.
Cruise control, keyless entry system, push-button start, wiper motor, warning lights, power mirrors, interior lighting, exterior lighting, dashboard indicators, electronic parking brake, tire pressure monitoring system (TPMS), alarm and security system, remote engine start, heated and ventilated seats, heated steering wheel, wireless charging pad.
N/A
No major problem has been reported
Dashboard rattles, squeaks, wind noise, door seals, weather stripping, water leaks, air leaks, excessive road noise, suspension noise, drivetrain noise, exhaust rattles, engine bay noises.
N/A
No major problem has been reported
N/A
No major problem has been reported
N/A
No major problem has been reported
N/A
No major problem has been reported
The world's top supplier of programmed OEM (Original Equipment Manufacturer) Powertrain Control Modules (PCM), Engine Control Modules (ECM), Injection Control Modules (IDM), Body Control Modules (BCM), Transmission Control Modules (TCM), Engine Control Units and all other car control units. With over a decade in the business, we are the most reliable source when it comes to programming services for replacement engine control modules.
Pressure loss on your vehicle? U3576 flags a Stack Differential Pressure Sensor circuit fault—possible HVAC failure. Scan, inspect wiring, replace sensor.
Coolant mixing valve sensor fault lights up on your vehicle—risking overheating. Scan U3575, test the sensor, and promptly reprogram or replace it.
Coolant temperature spikes or no heat in your vehicle? U3574 signals a faulty Coolant Mixing Valve—run a module scan and arrange reprogramming or replace.
Engine overheating or coolant warning on your vehicle? A faulty coolant mixing valve control circuit can cause temp loss—scan, reprogram or replace now.
Temp gauge spikes and overheating on your vehicle? U3572 means Stack Outlet Coolant Temp Sensor 2 circuit fault—scan or replace to prevent engine damage.
Temp gauge spikes and overheating in your vehicle? Faulty Stack Outlet Coolant Temp Sensor 1 can overheat engine—scan circuit and schedule module repair.
Coolant temperature warning on your vehicle? A Stack Inlet Coolant Temperature Sensor Circuit can cause overheating—scan, test and replace/reprogram.
Warning light or loss of power from your vehicle’s Anode Multifunction Valve? It threatens system reliability—scan the code and replace the valve promptly.
Your vehicle flashes U3568—Anode Multifunction Valve control circuit fault, risking loss of function. Scan, test the circuit, then reprogram or replace.
Power loss or boost warning in your vehicle? A faulty Anode Inlet Pressure Sensor 2 circuit can trigger limp mode—scan, test wiring and replace sensor.
Fuel pressure warning on your vehicle? A faulty Anode Inlet Pressure Sensor 1 circuit can cause erratic fuel delivery—scan the code, test the sensor, an…
Hydrogen pressure warning on your vehicle? Faulty Hydrogen Supply Line A Pressure Sensor 2 circuit can cut fuel‑cell output—scan and replace the sensor.