2014 Infiniti Q50: Transmission control module failure
Common wear/failure (not a recall)
Symptoms
Owners of the 2014 Q50 report: transmission control module failure. CarComplaints.com lists 1 owner complaints, average mileage 92,000 miles.
NHTSA has 19 owner complaints for the 2014 Q50 in this area. Examples:
- NHTSA complaint ODI #11695638 (filed 10/26/2025): “Driveshaft broke while driving down the road!!…”
- NHTSA complaint ODI #11673542 (filed 07/14/2025): “I received a check engine light will driving which is now indicated as code p0720 and p0500. the car refused to shift past 3rd gear and began to sputter and would not allow me to go past 25mph disrupting the flow of traffic.…”
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: replacement TCM (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Diagnosis needs a scan tool; repair or replacement needs a lift, transmission jack and the manufacturer's fluid fill/relearn procedure. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $2,500 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
AutoZone · O'Reilly · Advance · RockAuto
Sources
Page last updated .