hardly worth mentioning
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
60,072 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 MAZDA6 engine problems

engine problem

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2004 Mazda MAZDA6 Owner Comments

problem #6

Jan 012014

MAZDA6 4-cyl

  • 40,112 miles


Driving normally, transmission gets struck in 1st, 2nd, 3rd or fourth gear. Sometimes transmission will downshift very, very hard.

- Fort Lauderdale, FL, USA

problem #5

Apr 012014


  • 136,000 miles
Car just unexpectedly down shifts from 4th to 3rd gear.. transmission revs. Have to stop the car. Can not take interstate because it may cause a wreck.. alternator light and check engine light comes on.. have to turn the car off and restart the car to reset gears..

- Charleston, SC, USA

problem #4

Jun 242005

MAZDA6 4-cyl

  • 11,677 miles
I am the original owner of the vehicle, I complained of engine surge on several visits to Mazda, and they would always say they were unable to duplicate the problem. I was recently driving the vehicle when it accelerated on it's own, the RPM's would fluctuate between 2 and 4. the vehicle accelerated uncontrollably, I had difficulty stopping at stop signs and traffic lights on my way to my mechanic. When I reached his garage I left the vehicle in park to show him what it was doing and it idled at 3 rpms. The mechanic has not been able to repair the vehicle. I have researched the problem and have found that other Mazda and Ford vehicles have had similar issues.

- Port Orange, FL, USA

problem #3

Jul 312012

MAZDA6 4-cyl

  • 162,440 miles


My battery on my 2004 Mazda 6 went out and I had to jump start it to.go to work and come from work one day. The next day I took my battery to get checked to see what the issue was and they told me my battery was completely dead and it had only 6 months of usage. I put a new battery in my vehicle and as I installed the new battery I unplugged it to see if my alternator would kick in to make sure it was working correctly and as I put the battery back on a shortage happens and my wipers came on at full speed and all my lights were blinking on my dash and a smell of electrical wires burning started to happen and the entire electrical system has messed up. Turn signal lights don't work, headlights, bose stereo, hazard lights, reverse lights truck don't open windows don't go up or down and while I drive the speedometer does not track the velocity the needle goes crazy and my E-brake light is on and track control light is blinking and the air bag lights come on all the time. I do not know where to start to fix this issue but I'm really disappointed in this because I just have 8 months with my vehicle from a dealer ship and they checked out car just fine. This is going to be a super high cost to repair all the damages. Just from a change of a battery. And to top it all thank god I wasn't in the car because their was a small fire in the wires but it went away quick.

- Arlington, TX, USA

problem #2

Sep 252004

MAZDA6 6-cyl

  • Automatic transmission
  • 5,100 miles
I was originally misquoted in my complaint taken over the phone so I am writing this as a clarification of the event that occurred. I own a 2004 Mazda 6S. While entering a parking space at a speed no more than 10mph, the brakes disengaged for 2-3 secs while the brake was still being applied. I was certain that the car was going to jump the curb, which did not happen. The brakes re-engaged causing myself and my passenger to lunge forward violently. Upon taking the car to a Mazda service department, the car was test driven, the braking system was checked, and found to work normally at the time of servicing.

- Los Angeles, CA, USA

problem #1

Sep 252004

MAZDA6 6-cyl

  • Automatic transmission
  • 5,100 miles
While pulling into a parking space, the brakes disengaged, almost causing consumer's vehicle to crash into other vehicles. The dealer inspected the vehicle, and stated that the brakes were not defective. The consumer stated that the vehicle lunged forward during the incident.

- Los Angeles, CA, USA

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