2019 Toyota 4Runner: Rodents chewing wires and fuel line EVAP
Common wear/failure (not a recall)
Symptoms
Owners of the 2019 4Runner report: rodents chewing wires and fuel line EVAP. CarComplaints.com lists 2 owner complaints, average mileage 21,000 miles.
NHTSA has 8 owner complaints for the 2019 4Runner in this area. Examples:
- NHTSA complaint ODI #11690854 (filed 10/01/2025): “The contact owns a 2019 toyota 4runner. the contact stated that while driving at an undisclosed speed, the instrument cluster displayed a blank screen. the contact stated that the failure also occurred while reversing. in addition, the radio volume independent…”
- NHTSA complaint ODI #11652743 (filed 04/04/2025): “My vehicle keeps leaking inside from the ac drip line and it's been cleared multiple times and it still keeps happening and it floods the whole bottom of the passenger side floorboard and becomes soaked through which can cause erosion, electrical issues, mold …”
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 $1,600 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Rodents chewing wires and fuel line EVAP (2019 4Runner)
- NHTSA complaints API, 2019 4Runner
Page last updated .