Replacement Guide / Toyota / Highlander / 2003
Replacement guide
2003 Toyota Highlander
Owner-reported component and symptom data for this model year.
What are you trying to fix?
Replacement-related components reported for this vehicle
29 owner reports involving the head gasket
View replacement guide5 owner reports involving the power window regulator
View replacement guide3 owner reports involving the water pump
View replacement guide2 owner reports involving the thermostat
View replacement guide2 owner reports involving the oxygen sensor
View replacement guide1 owner report involving the heater core
View replacement guide1 owner report involving the brake pads
View replacement guide1 owner report involving the brake rotor
View replacement guide1 owner report involving the master cylinder
View replacement guide1 owner report involving the headlights
View replacement guide1 owner report involving the brake lights
View replacement guide1 owner report involving the wiper motor
View replacement guide1 owner report involving the door latch
View replacement guide1 owner report involving the throttle body
View replacement guideBrowse by system
Fuel / engine
- Head Gasket — 29 owner reports
- Oxygen Sensor — 2 owner reports
- Throttle Body — 1 owner report
Cooling / HVAC
- Water Pump — 3 owner reports
- Thermostat — 2 owner reports
- Heater core — 1 owner report
Brakes
- Brake pads — 1 owner report
- Brake rotor — 1 owner report
- Master cylinder — 1 owner report
Lighting / visibility
- Headlights — 1 owner report
- Brake lights — 1 owner report
- Wiper motor — 1 owner report
Body / access
- Power window regulator — 5 owner reports
- Door latch — 1 owner report
About this data
Component evidence comes from structured complaint categories and reviewed component mentions in complaint summaries. Owner-situation evidence comes from reviewed symptom language in complaint summaries. Reports are signals, not diagnoses.
How to read the counts
Counts are distinct owner reports involving a canonical component. They are not a failure rate, probability, or share of vehicles sold. A complaint involving a component does not prove that component caused the problem. Parent NHTSA system buckets are not counted as the part itself.