There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2007 Kia Rio 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)AS I WAS BACKING OUT OF MY DRIVEWAY, 6 MONTHS AFTER I PURCHASED MY BRAND NEW 2007 KIA RIO, I HEARD A LOUD NOISE AND FELT MY CAR LURCH SIMULTANEOUSLY, AS IF I HAD BEEN HIT BY A CAR. WHEN I TRIED TO RESUME BACKING UP MY CAR HAD POPPED OUT OF REVERSE. ALTHOUGH IT DOESN'T HAPPEN FREQUENTLY, IT DOES HAPPEN I HAVE HAD PEOPLE IN THE CAR WHEN IT HAPPENS. WHEN I TOOK IT TO THE DEALERSHIP, I WAS TOLD THEY "COULDN'T DUPLICATE IT". *TR
DRIVING ON INTERSTATE 75 AT 70 MPH THE AUTOMATIC TRANSMISSION SUDDENLY DOWNSHIFTED FROM OVERDRIVE INTO 3RD GEAR. THE SUDDEN SURGE ALMOST SENT ME INTO THE MEDIAN. THIS HAS HAPPENED 5 TIMES IN THE LAST MONTH. THE DEALER HAS REPLACED THE SPEED SENSOR UNIT TWICE AND PROBLEM CONTINUES. DEALER KEPT OLD PARTS. *JB
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.