2017 Hyundai Sonata: Excessive oil consumption
Common wear/failure (not a recall)
Symptoms
Owners of the 2017 Sonata report: excessive oil consumption. CarComplaints.com lists 17 owner complaints, average mileage 65,650 miles.
NHTSA has 400 owner complaints for the 2017 Sonata in this area. Examples:
- NHTSA complaint ODI #11771429 (filed 10/15/2026): “I had recently taken my 2017 hyundai sonata in for an engine diagnostic check at the bel air hyundai dealership, (10/15/26) worth $199.99 for an hour of maintenance, after experiencing sudden jolts when powering on and driving, needing additional time warming …”
- NHTSA complaint ODI #11766104 (filed 09/22/2026): “I am reporting an unaddressed, critical safety defect involving the theta ii engine in my 2017 hyundai sonata. the engine has developed a severe internal metallic knocking noise consistent with connecting rod bearing failure—the exact manufacturing defect asso…”
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: eventually will require engine replacement (8 reports) dealer installed 4 fuel injectors, 4 plugs, 1 coil (1 reports) replacement of oil pan (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 $1,320 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .