2021 Toyota Highlander Hybrid Electrical system Problems
- Complaints
- 1about this part
- Share
- 7%of 15 total for the year
- Median mileage
- 77,900miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the electrical system of the 2021 Toyota Highlander Hybrid, 7% of the 15 complaints for this model year. Where a mileage was given, the median is 77,900 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 owns a 2021 Toyota Highlander Hybrid. The contact stated that upon starting the vehicle, the instrument panel lights were flashing. The vehicle then independently turned off and restarted repeatedly. The vehicle was towed to the dealer, where it was determined that the battery level was low and needed to be replaced. The battery was replaced, and other unknown repairs for shifting failure were performed. The vehicle was driven back to the residence; however, the failure recurred upon starting the vehicle the following day. …”
NHTSA complaint #11720641, filed 2026-02, 77,900 milesRelated service bulletins
- 11033412May 14, 2026Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we…
- 11031158Mar 18, 2026Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the…
- 11028726Jan 30, 2026OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.
- 11028722Jan 28, 2026Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map…
- 11028711Jan 6, 2026Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we…
- 11024098Sep 25, 2025The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially…
- 11024097Sep 24, 2025Technical instructions for 25td01 rear traction motor cable corrosion certain 2019 - 2024 rav4 hv (awd), 2021- 2024 rav4 prime, 2020-2024 highlander hv (awd), 2021-2024 venza hv…
- 11024096Sep 24, 2025The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially…
- 11024090Sep 18, 2025Technical instructions for 25td01 rear traction motor cable corrosion certain 2019 - 2024 rav4 hv (awd) 2021- 2024 rav4 prime 2020-2024 highlander hv (awd) 2021-2024 venza hv…
- 11024089Sep 18, 2025The subject vehicles are equipped with a rear motor unit and an HV Floor Under Wire that provide high voltage to operate the motor. Mud, water, or road salt could potentially…
Electrical system: other model years
Other parts of the 2021 Toyota Highlander Hybrid
8 complaintsBody and structure
4 complaintsBrakes
1 complaintsFuel system
1 complaintsHybrid propulsion system
1 complaintsVehicle speed control
1 complaints
← All problems reported for the 2021 Toyota Highlander Hybrid
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 29, 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