Complaint 2137032
2020 TOYOTA HIGHLANDER • POWER TRAIN • incident Oct 6, 2025
- Complaint ID
- 2137032
- Make
- TOYOTA
- Model
- HIGHLANDER
- Model Year
- 2020
- Component
- POWER TRAIN
- Incident Date
- Oct 6, 2025
- Date Received
- Oct 7, 2025
- Data As Of
- Jul 1, 2026
Complaint Summary
POWER TRAIN
Owner Narrative
I am filing a complaint with the NHTSA regarding persistent transmission slipping in my 2020 Toyota Highlander LE equipped with the UA80-E 8-speed automatic transmission. Since reaching approximately 55,000 miles, I have experienced noticeable slipping, characterized by delayed acceleration, erratic shifting, and occasional lurching, which align with documented defects in the UA80 platform as outlined in over 430 NHTSA complaints and Toyotaâs Technical Service Bulletins (e.g., T-SB-0160-18 and T-SB-0008-21). These issues stem from a known manufacturing flaw involving a washer tab failing to secure the counter drive gearâs retaining nut, leading to gear movement, internal wear, and symptoms like mine. This defect, prompting Toyotaâs Customer Support Program ZJC for 2017â2018 models and reported in later years like 2020, compromises vehicle safety and reliability, as slipping can cause unpredictable handling. I urge the NHTSA to investigate further and hold Toyota accountable for addressing this widespread issue across affected models.
Owner-submitted narrative on file with NHTSA. Complaint narratives are self-reported and have not been verified.
Related
Data sources & freshness
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Census, SAFER, SMS, Licensing & Insurance (L&I), roadside inspections, crashes, and authority history.
Vehicle recall campaigns, defect investigations, and consumer safety complaints (SCRS).
Cross-border carrier registry and Canadian recall campaigns where applicable.
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