2008 Mazda CX-9 Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/12/2026
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 172 complaints citing each category; one complaint can cite several. Full breakdown on the 2008 Mazda CX-9 overview page.
What owners report
“IN MOTION, AFTER ACCELERATING, I LET UP OFF THE GAS AFTER REACHING 60MPH ON THE FREEWAY AND THERE IS A CLUNKING SOUND ACCOMPANIED WITH A…”NHTSA complaint 10985072 — filed 05/12/2017
“2008 CX-9 WITH 110,000 MILES TRANSFER CASE FAILURE WITH PROBABLE DAMAGE TO TRANSMISSION. PROGNOSIS WAS MADE DURING REPAIR OF LEAKING REAR AXEL SEALS WHEN MECHANIC…”NHTSA complaint 10953986 — filed 02/11/2017
“I HAVE A 2008 MAZDA CX-9 WITH 139,000 MILES ON IT. THE TRANSFER CASE HAS DESTROYED THE TRANSMISSION. THE TRANSMISSION WAS COMPROMISED BY THE FAULTY…”NHTSA complaint 10825072 — filed 02/09/2016
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2008 Mazda CX-9 have transmission & power train problems?
Power Train is the #3 most-reported problem area on the 2008 Mazda CX-9: 25 of 172 complaints on file (14.5%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2008 Mazda CX-9 have in total?
172 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 10 involved a crash, 0 involved a fire, 5 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.
