2015 Hyundai Sonata: Excessive oil consumption
Common wear/failure (not a recall)
Symptoms
Owners of the 2015 Sonata report: excessive oil consumption. CarComplaints.com lists 38 owner complaints, average mileage 77,400 miles.
NHTSA has 648 owner complaints for the 2015 Sonata in this area. Examples:
- NHTSA complaint ODI #11771005 (filed 10/14/2026): “A franchise dealership performed a federally mandated safety recall service (ecm software update) and a knock sensor replacement on this 2015 hyundai sonata 2.0l turbo. to perform these specific repairs, the technician had to work directly around the intake an…”
- NHTSA complaint ODI #11770729 (filed 10/13/2026): “Hyundai motor america is explicitly refusing to honor the mandatory safety recall and lifetime warranty extension for a catastrophic rod bearing failure on my 2015 hyundai sonata (vin [xxx]). the engine suffered a sudden internal connecting rod bearing seizure…”
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: new engine installed (7 reports) repair engine's oil consumption (2 reports) new engine replacement under recall (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $5,100 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .