2012 Mazda Mazda3: engine and transmission complaints
HIGH COMPLAINT SIGNAL
42%
75 of 178 relevant owner complaints are about the engine, transmission or fuel system
42% of relevant owner complaints filed with NHTSA on the 2012 Mazda Mazda3 are about the engine, transmission or fuel system. That is a model-level pattern, not bad luck.
Worse than 50% of the 1,230 model years we track (2010–2023).
Excludes 48 airbag, lighting and seat-belt recall complaints that would otherwise mask the signal (unadjusted: 33%).
The percentage is each model year's drivetrain complaint share. No elevated signal describes the model year, not any one car; a well-kept example of a flagged model can still be the right buy, and any of these still needs an inspection.
What owners reported
FUEL/PROPULSION SYSTEM09/26/2025
The car leaks gas when the tank is full and if the car is inclined slightly. I've noticed the problem several month ago with an occasional odor but finally saw the gas leaking recently when it was parked on a sloped street.
FUEL/PROPULSION SYSTEM04/02/2025
Our fuel tank is leaking for no reason. Brought it in last year (2024) for state inspections and let them know we smell gas when we park sometimes. They poke around and find nothing, but note there is a faint gas smell and to bring it to the dealer. We take it to Mazda to see if they can fix, they find nothing and char…
POWER TRAIN06/23/2024
Car started jerking and on the way home, the car lost all power to the transmission. The check engine light came on as well as the AT and traction lights. Absolutely no power to the transmission. codes P0780 and P0751.
Three of 75 drivetrain complaints. The full report shows more, with quotes about the engine in the car you are looking at first.
Recall campaigns on this model year (1)
STRUCTURE:BODY:HATCHBACK/LIFTGATE
Mazda North American Operations (Mazda) is recalling certain model year 2010-2013 Mazda3 and Mazdaspeed3 vehicles manufactured November 18, 2008, to June 8, 2013, 2012-20…
This does not say whether a particular car has an open, unrepaired recall. That depends on the VIN.
Before you buy a 2012 Mazda Mazda3
Ask the seller whether the transmission has ever been repaired or replaced, and whether the car has shown shuddering, slipping, delayed or harsh shifts, or a whine at speed.
Drive it from a cold start and long enough to warm up. Many transmission faults hide once the car is warm.
Get an independent pre-purchase inspection from a mechanic you choose, and tell them to focus on the transmission.
1 recall campaign on this model year. Whether a specific car still has one open depends on the VIN; the report checks that.
Ask for service records. A transmission already replaced under warranty is a different car from one that was not.
Have the VIN?Paste it and get the full report for that car. First report free, then a 30-day pass covers a whole car search.
Experimental model-level information. This is not a vehicle inspection, vehicle-history
report, financial advice or purchase recommendation. It describes patterns across a model year, not the condition
of any individual vehicle.