2019 Toyota Highlander: Whining noise upon acceleration
Common wear/failure (not a recall)
Symptoms
Owners of the 2019 Highlander report: whining noise upon acceleration. CarComplaints.com lists 4 owner complaints, average mileage 102,200 miles.
NHTSA has 210 owner complaints for the 2019 Highlander in this area. Examples:
- NHTSA complaint ODI #11772392 (filed 10/20/2026): “I started hearing a faint sound and initially thought it was odd, but certainly sounded different and could not really tell where it was coming from. upon taking it to the dealer for diagnosis, i learned that the transmission will need full replacement. i al…”
- NHTSA complaint ODI #11772411 (filed 10/20/2026): “The vehicle began making a whining noise several months ago. after doing some research this vehicle has the ua80 transaxle that has a known defect that produces the whining noise and eventual damage. there are other years of this vehicle that are subject to …”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: toyota recommends replacing the transmission at my cost (3 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Diagnosis needs a scan tool; repair or replacement needs a lift, transmission jack and the manufacturer's fluid fill/relearn procedure. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $7,320 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Whining noise upon acceleration (2019 Highlander)
- NHTSA complaints API, 2019 Highlander
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