2021 Hyundai Elantra: Several computer option settings not working
Common wear/failure (not a recall)
Symptoms
Owners of the 2021 Elantra report: several computer option settings not working. CarComplaints.com lists 1 owner complaints, average mileage 2,900 miles.
NHTSA has 42 owner complaints for the 2021 Elantra in this area. Examples:
- NHTSA complaint ODI #11771253 (filed 10/14/2026): “My car has 60,000 miles and the horns on the car have been replaced 3 times hyundai issued an extended warranty for the horns on certain 2021-2025 model year elantra, 2022-2025 model year elantra n and 2021-2025 model year elantra hybrid vehicles' for the 10 y…”
- NHTSA complaint ODI #11756440 (filed 08/12/2026): “Vehicle was serviced to remediate recall 271- backup camera replacement in january, 2025. in june 2026, vehicle is exhibiting the same issue. rear camera is non functional in the following ways: 1. vehicle is shifted to reverse, backup camera does not functio…”
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
No sourced cost range: get a written quote after diagnosis.
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
- CarComplaints.com: Several computer option settings not working (2021 Elantra)
- NHTSA complaints API, 2021 Elantra
Page last updated .