2017 Infiniti Q50: Blown head gasket main bearing failure
Common wear/failure (not a recall)
Symptoms
Owners of the 2017 Q50 report: blown head gasket main bearing failure. CarComplaints.com lists 1 owner complaints, average mileage 67,000 miles.
NHTSA has 17 owner complaints for the 2017 Q50 in this area. Examples:
- NHTSA complaint ODI #11739745 (filed 05/23/2026): “I have had several major problems with this car's engine. once it shut down (was detecting no oil but was full) while on the interstate. had to replace the radiator fan assembly and module. coolant leaks…”
- NHTSA complaint ODI #11700285 (filed 11/19/2025): “My vehicle has been stalling and burning/leaking oil internally for some time now with white smoke coming from the rear. well infiniti sent a post card and stated that the emission warranty is extended for 120,000 miles which my vehicle has had the issue for …”
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: replace long block (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 $7,500 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .