2023 Hyundai Santa Fe: RPMs drop while driving on highway
Common wear/failure (not a recall)
Symptoms
Owners of the 2023 Santa Fe report: RPMs drop while driving on highway. CarComplaints.com lists 2 owner complaints, average mileage 3,500 miles.
NHTSA has 36 owner complaints for the 2023 Santa Fe in this area. Examples:
- NHTSA complaint ODI #11762036 (filed 09/03/2026): “Collision warning sensor alarm randomly comes on my dash and my car slams on the breaks. very dangerous, i’m scared to drive down the highway going 60mph. 80,109 miles 2023 hyundai santa fe. i have not brought it in to a hyundai dealership because they want a …”
- NHTSA complaint ODI #11760160 (filed 08/27/2026): “Horn stopped working…”
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: unknown (1 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
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: RPMs drop while driving on highway (2023 Santa Fe)
- NHTSA complaints API, 2023 Santa Fe
Page last updated .