2025 Toyota Grand Highlander Engine cooling Problems
- Complaints
- 3about this part
- Share
- 4%of 81 total for the year
- Median mileage
- 15,000miles
- Trend
- Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA recorded 3 complaints about the engine cooling of the 2025 Toyota Grand Highlander, 4% of the 81 complaints for this model year. Where a mileage was given, the median is 15,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“The contact owned a 2025 Toyota Grand Highlander. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with radiator failure. The contact was informed that there was a hole in the radiator. The contact was informed that the radiator needed to be replaced. The vehicle was repaired. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 15,000.”
NHTSA complaint #11765921, filed 2026-09, 15,000 miles“The contact owns a 2025 Toyota Grand Highlander. The contact stated that while driving approximately 35 MPH, another vehicle struck a rock, and the rock went through the front grille of the vehicle and punctured the inverter radiator, causing a coolant leak and a loss of motive power. The message Hybrid System Malfunction was displayed following the loss of motive power. The vehicle was towed to a dealer, where it was diagnosed and determined that the inverter radiator had sustained a puncture and needed to be replaced. The vehicle was repaired. …”
NHTSA complaint #11762864, filed 2026-09, 14,300 miles“The contact owns a 2025 Toyota Grand Highlander. The contact stated that while driving 70 MPH, the air conditioner failed to operate. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that the condenser had failed and needed to be replaced. The dealer informed the contact that the front grille had large open apertures and no protective screen between the grille or the heat exchangers. The vehicle was repaired. The contact stated that the failure was associated with NHTSA Investigation: DP26006 (Engine and Engine Cooling). …”
NHTSA complaint #11764131, filed 2026-09, 15,450 milesRelated service bulletins
- 10253223Mar 4, 2024This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. These products are ordered through the…
Engine cooling: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2025 | 3 | 4% |
| 2024 | 2 | 1% |
Other parts of the 2025 Toyota Grand Highlander
23 complaintsTransmission and drivetrain
18 complaintsEngine
13 complaintsFuel system
12 complaintsBody and structure
10 complaintsElectrical system
6 complaintsVehicle speed control
6 complaintsVisibility (wipers, defrost, mirrors)
4 complaintsBack-over prevention (rear camera)
3 complaintsBrakes
3 complaintsForward collision avoidance
3 complaintsLane departure
3 complaints
← All problems reported for the 2025 Toyota Grand Highlander
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology