2011 Mazda CX-9 Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 170 complaints citing each category; one complaint can cite several. Full breakdown on the 2011 Mazda CX-9 overview page.
What owners report
“THE VEHICLE WAS IDENTIFIED AT THE DEALERSHIP AS HAVING A LEAKING TRANSFER CASE THAT NEEDED TO BE REPLACED. DURING THIS REPLACEMENT THE TRANSMISSION SPLINES WERE…”NHTSA complaint 11163898 — filed 12/28/2018
“64300 MILES ON ODOMETER AND AM EXPERIENCING TRANSMISSION SHUDDER AT 35 - 45 MPH IN 5TH GEAR. TORQUE CONVERTER PROBLEM? PRETTY LOW MILES FOR TRANSMISSION…”NHTSA complaint 11063789 — filed 01/19/2018
“ANY TIME THERE IS EVEN A SLIGHT INCLINE IN THE ROAD AND ANYTHING THAT COULD LESSEN TRACTION SUCH AS A LITTLE GRAVEL, MY TIRES SPIN…”NHTSA complaint 11060846 — filed 01/05/2018
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2011 Mazda CX-9 have transmission & power train problems?
Power Train is the #2 most-reported problem area on the 2011 Mazda CX-9: 25 of 170 complaints on file (14.7%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2011 Mazda CX-9 have in total?
170 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 7 involved a crash, 3 involved a fire, 2 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
