Huge win for car owners! All TSBs to be made public. The Center for Auto Safety just made the NHTSA (US Government) make public the full text of all TSBs from now on. They are the same organization that has petitioned the NHTSA & filed lawsuits to protect car owners over exploding gas tanks & other major safety issues. Whenever you drive in your car, you are safer thanks in part to a lot of work over the years by this small but very effective consumer advocacy group.

Please take a moment & say thank you by donating $5 or whatever you can to the Center for Auto Safety.


fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
16,034 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2004 Mazda MAZDA3 engine problems

engine problem

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2004 Mazda MAZDA3 Owner Comments

problem #1

Apr 202005

MAZDA3 4-cyl

  • Manual transmission
  • 16,034 miles


Vehicle will not start or idle falls vehicle, Mazda3 manual, would not start in driveway on cool spring Sunday evening. Towing service was dispatched and vehicle was taken to the closest Mazda dealership. After several dealers calls to Mazda's corporate headquarters, the service professional was told to replace the ignition key and microchips. After four days I went to pick up the vehicle. Upon starting the vehicle in the dealers lot the idle began to fall once again; however, it did start this time. A few miles from the dealership the idle became so hard to deal with that the vehicle was towed back to the original service dealership once again. Several more calls were placed to the headquarters and finally the decision was made to replace the O2 sensor. The car has started and run ever since the repair, but the idle is much lower than it was on original receipt of the vehicle, and the engine at idle speeds is much louder and sounds labored. Once winter comes I fear the problem will reappear. The future of the vehicle's performance is unknown. Possible safety compromise.

- Oil City, PA, USA

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