2020 Toyota Tundra: Rodents eating soy-based wires
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Tundra report: rodents eating soy-based wires. CarComplaints.com lists 2 owner complaints, average mileage 3,400 miles.
NHTSA has 4 owner complaints for the 2020 Tundra in this area. Examples:
- NHTSA complaint ODI #11766148 (filed 09/22/2026): “When driving on the freeway at 70mph speeds during rush hour, i lost all power to the vehicle causing me to have to immediately pull to the side of the freeway with minimal control of the vehicle. i had to come to a complete stop on the freeway putting myself …”
- NHTSA complaint ODI #11509652 (filed 03/01/2023): “Note: toyota has confirmed this issue, but is unable to resolve this. when the sos button is pressed, the dcm module is supposed to send the proper vin number and location to the call center. the call center does not receive the proper vin number and pulls up …”
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: none clearly reported. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Moderate
Finding and splicing chewed wiring is doable with a multimeter and patience but can be time-consuming; harness replacement is pro work. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $4,840 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .