2020 Hyundai Elantra: Soy-based wiring being eaten by rodents
Common wear/failure (not a recall)
Symptoms
Owners of the 2020 Elantra report: soy-based wiring being eaten by rodents. CarComplaints.com lists 6 owner complaints, average mileage 7,400 miles.
NHTSA has 27 owner complaints for the 2020 Elantra in this area. Examples:
- NHTSA complaint ODI #11763045 (filed 09/09/2026): “2020 hyundai [xxx], vin: [xxx] incident description: on xxx i was pulling into a parking spot and had my foot firmly on the brake pedal. when i attempted to shift the vehicle into park the engine suddenly revved up excessively. the vehicle then accelerated for…”
- NHTSA complaint ODI #11759215 (filed 08/24/2026): “The high beam lights don’t work. doesn’t make changes to high. relay, bulbs and breakers appear to be ok.…”
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: wire repair (6 reports). 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 $290 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Soy-based wiring being eaten by rodents (2020 Elantra)
- NHTSA complaints API, 2020 Elantra
Page last updated .