NHTSA Complaint #11683201 — 2015 INFINITI Q50

VEHICLE SPEED CONTROL issue reported to NHTSA

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Complaint Details

ODI Number	11683201
Vehicle	2015 INFINITI Q50
Component	VEHICLE SPEED CONTROL
Date of Incident	August 24, 2025
Date Filed	August 26, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

The car just slowed down super fast on freeway almost got rear ended. It would not go past 3rd gear. Poor acceleration. Could have caused a huge accident. I got it diagnosed and they said it is valve body/speed sensor/tcm and they said this is a COMMON problem for 2015 Q50. I replaced this part 2 years ago and here we go again. Shop diagnosed and said this tcm (transmission control module which is in the transmission) but they have to change whole transmission. Everything happened all the sudden then check engine light came on.

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