There are 11 stored owner reports matching the powertrain & transmission leading-label group for the 2017 Mazda CX-5 in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 11 of 11 matching reports.
Open the full vehicle complaint log (all categories)My car only has 65k miles on it and the rear differential failed and needs to be replaced. I am seeing this posted online by many Mazda CX-5 owners well under the mileage this typically happenes but out of the warranty period. Mazda should start a recall or compensate owners for this. its never been in an accident simply a commuter car used around town
Rear differential failed around 97,000 miles. We were three months past our certified pre-owned warranty. Total cost to repair was around $4400 after a discount on parts and labor through our Costco membership. Contacted Mazda to see if they’d be willing to provide any assistance to cover the repair, they declined. Service advisor told us that it was a catastrophic failure that we did not cause. We purchased this car in 2020 and have always had it serviced at the dealership and at no point did they bring it up as it being an issue. The rear differential should not fail.
The contact owns a 2017 Mazda CX-5. The contact stated while the vehicle was parked, there was an abnormal sound coming from the rear of the vehicle. No warning lights were illuminated. The vehicle was taken to a dealer where it was diagnosed and determined that the rear differential needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 80,000.
Rear differential began to leak. Mechanics (3) looked at the part and discovered play in both right and left side axles leading into rear differential along with loud clanking noises inside the differential itself. Seal areas on both sides of unit had extensive play. Diagnosed with worn gears inside rear differential. Vehicle is only 8 years old (bought brand new) and has 74,110 miles. Complaint filed with Mazda claiming that gears and rear differential should not have failed given the mileage. Mazda has advised me that the car was out of warranty (5yrs/60k mileage) that the repairs were not covered. They wanted me to drive my car to a local Mazda dealer but I declined since driving it may/would have caused more damage to differential. Advised them to have their mechanic go to my local repair facility where part was replaced and pick up the differential for verification. Research online has indicated other owners has suffered identical issues. Have not heard anything back from Mazda. Total cost to replace $3,993.49
Rear differential failed at roughly 80,000 miles. Depending on failure, unexpected loss of traction or a locking up of the drivetrain could occur. We were lucky to catch it before then. Dealer confirmed issue with no clear cause. No warning lamps/messages/etc indicated that the part was failing. The only thing we noticed was increased highway noise, which could easily be ignored by someone who is not as aware of good/bad car noises.
Car was making popping noise, got it checked out at mechanic. Said rear differential had metal in the oil.
Sudden jerking started when driving on a 45miles/hour with vehicle stopping suddenly. The issue was diagnosed by the dealer to be a transmission related and was asked to replace with a new transmission. There was no prior warning.
While driving on the interstate (continuously for about 4 hours) the vehicle suddenly lost power and the engine stalled. Power steering and power brakes were impacted and the vehicle was difficult to get off the road safely. Once stopped, it would not restart over a 30 minute period. A tow truck was called and it was taken to the dealer. A couple hours later when the dealer checked it, the vehicle started normally and drove without issue. A P0192 code was stored in the ECU so the high pressure fuel pump was replaced even though they could not reproduce the problem. The vehicle has 63000 miles on it now, but a similar sequence happened at 15000 miles. In that situation while driving at a steady speed all power cut out and the engine abruptly downshifted to the point where the tires squealed. After pulling off the road and stopping/starting the vehicle it seemed to drive normally again. We were traveling at the time with no dealer nearby, but when we returned back home we took it to the dealer and they found the same code P0192 and ran various tests and decided to replace the high pressure fuel pump even though it was driving properly. In only 63000 miles this vehicle has twice failed dramatically and without warning in ways that could easily cause an accident or injury. I am lacking in confidence that the root cause has ever been identified.
THE SHIFT LOCK LEVER ON THE TRANSMISSION GEAR SELECTOR GETS STUCK WHEN ITS COLD.
MY CAR UNEXPECTEDLY ACCELERATED ONCE ABOUT A MONTH AGO.AND TODAY 10/18/2018 IN PARKING BOTH TIMES. I AVOIDED HITING A VEHICLE EACH TIME BY QUICKLY STOMPING ON MY BRAKES.TODAY I TOUCHED ANOTHER CAR.LUCK HAD IN STOPPED IN TIME WITH NO DAMAGE. I WAS PARKING REARWARD THE FIRST TIME AND FORWARD TODAY 10/18/2018 IN MOTION.ON A CITY STREET.
WHEN SLOWING DOWN, AS SOON AS VEHICLES HITS 25 MPH, THE TRANSMISSION JERKS. GETTING WORSE, DISTRACTS FROM DRIVING
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.