definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
39,949 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.

2003 Mazda MAZDA6 electrical problems

electrical problem

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2003 Mazda MAZDA6 Owner Comments

problem #11

Jan 172014


  • 87,200 miles


Bought a 2003 Mazda 6 last year, my tachometer kept going crazy and the car would die out. I took it to good year, 3 codes came up. They changed the cam shaft sensor and the egr valve. That didn't fix the problem, good year took the parts out, put mine back in and told me to take it to a Mazda dealership. I took it to Mazda, they told me I had to change my PCM because it was shorting out, and my egr valve and that should take care of the problem. They quoted me 2K dollars for everything. I asked them how much they were charging for the parts, they told me 1100 for the PCM and 200 for the egr, the rest was labor. As the service advisor quoted me prices, I told her I can buy a PCM online for 145. She said, yes, you can do that, but we won't warranty the job because it's not our part. I told them are you sure that will take care of the problem" they said yes. I told them okay fine! constantly calling the dealership for 2 weeks asking when I was going to get my car back, they gave me a loaner. I had that for a week, so they had my car a total of 3 weeks. Finally I called again, I asked them what's going on with my car. They told me, I need a new engine. I was like what? what happened to 2K will take care of the problem? they said no, there's too much sludge in the engine, you need a new one. Upset, I'm already in for 2K and now they want me to spend another 5K for a new engine. Mind you, I was already hesitant because of the price of the PCM. Any way, service advisor tells me, I can buy a new/used engine online for 500 and have them change it. I told them that was the whole reason, I didn't buy the PCM online!I was told you wouldn't warranty it, now you want me to buy one online? I went to the dealership, picked up my car, still the same problem. I'm not the only one, see link... https://www.youtube.com/watch?V=xpkzphe4sbi or www.youtube.com/watch"V=N6foaybw_5K.

- Waianae, HI, USA

problem #10

Sep 092014


  • miles
My vehicle has been having an issue with the throttle position sensor. As well as the PCM, usually connected as noted by my mechanic. 3 things can come from this he said. I could be having an issue with the gas pedal, the computer, or I need a new throttle body. From my understanding so far the issue causes the computer to incorrectly read, causing the check engine light as well as a few others to abruptly turn on while car is in full motion, for me this is typically at 55 mph. The car then looses the ability to properly accelerate, or decelerate. I have to quickly pull my car to the shoulder, put in park while the car seems to be lurching forward, and turn off the engine. If I do not do this quick enough the engine begins to rev high and low continuously. My RPM gauge bounces around as it is doing so. After leaving the car off for a few moments I can then restart. My check engine light will now stay on for about 50 miles and turn itself off. Once the light has gone off usually within 15 miles my car will do it all over again. After calling my dealer, because I still owe 2 more years of payment on the car, I am told that they can fix it if I have my warranty intact. Unfortunately it has run out as of July. The part alone from the dealership is $700. Why is there no recall on this issue if so many people are having it?

- Georgetown, DE, USA

problem #9

Aug 122014

MAZDA6 6-cyl

  • 164,354 miles
Driving at approximately 60 mph on a state highway, the vehicle suddenly went into limp mode. From the sudden jump into limp mode, a multi-car accident was narrowly avoided. This is definitely a safety concern. Thankful nobody was hurt.

- Shelbyville, IN, USA

problem #8

Aug 012010


  • 82,000 miles


On several models of Mazda 6's Mazda has issued a tsb for the problem which is a defective throttle position sensor. I have read thousands of complaints by consumers. Mazda has made a new part yet not recalled the old part. When this part fails you lose all acceleration power to the vehicle. The way to reset this is to turn off the motor and turn it right back on. I was driving on a two-lane highway crossed over the broken double yellow line to pass another vehicle when this defective part failed and I lost all acceleration. Thankfully, I had just enough time to be able to allow the same car I was passing to pass me and I pulled off the roadway. The car worked fine for the rest of that trip it occurred again on the freeway in the fast lane. I contacted Mazda corporate customer care they advised me that they were aware of the issue but had not issued a recall at this time.

- Clovis, CA, USA

problem #7

Feb 052004


  • 85,000 miles
The contact owns a 2003 Mazda 6. while driving approximately 35 mph, the vehicle vibrated and hesitated without warning. The contact pulled over to the side of the road and the vehicle was towed to an authorized dealer. The technician stated that the failure was related to the engine, which was replaced. In addition, the vehicle would shift roughly from first to second gear. He experienced failure with the exterior lights and the window operating mechanisms. The vehicle was taken to an authorized dealer and a diagnostic test was performed. The technician stated that the aftermarket electronic components were possibly the causes of the failure. The vehicle was taken to an independent mechanic, who replaced the following components: Alternator, battery, exterior lights, and four window operating mechanisms. Also, the computer module, transmission, and air conditioner modules were replaced. The failure mileage was 85,000 and current mileage was 94,000.

- Oceanside, CA, USA

problem #6

Sep 012004

MAZDA6 6-cyl

  • Manual transmission
  • miles
The clutch has begun to fail. The dealer indicated that it would be five months before one became available. The clutch, starter, cd changer, and panel cover were defective. There was rust on the door sashes. There was a smell from the exhaust that entered the vehicle, there were vibrations and rattles in the door, which had been adjusted. There were problems with the master cylinder and the leaking fuel sender unit in the gas tank. The starter would grind and the clutch shuddered.

- Bloomington, IL, USA

problem #5

May 062003

MAZDA6 6-cyl

  • Automatic transmission
  • 3,890 miles


I purchased a 2003 Mazda6 on 4/18/2003, at of today it has 3,800 miles.after driving about 10 miles I stopped to order food from a drive thru window. I was told that it would be 10 mins for my order to be ready, so I pulled over to a stall and waited for 15 mins, with the car still on(no ac windows down). While placing my order I heard the fan turn on I knew it was on because it was making a very loud noise (not like normal). It stay on while I was parked waiting for my order and on the drive home 10 min. It continued to stay on 90 sec after car was turned off. I went to check on the internet to see if there was a problem with anyone else and from ca to fa and even in can Mazda6 owners have had to replace relay control module. I called dealer they said that this was normal, but I could bring it in to check. After car was inspected I was told that the relay control module needed to be replaced.

- Killeen, TX, USA

problem #4

Jan 062004

(reported on)


  • 4,000 miles
Manufacturing problems with 2003 Mazda 6 / auto alliance international facility. There was rust on the door sashes of all four. The consumer's vehicle may be one of 46K assembled at the aai facility throughout July of 2003 that was potentially affected. The cd player/changer had become defective, there was a defective fuse access cover, there was a rattling in interior driver and passenger door panel while driving or when listening to music, and there was a rotten egg smell that had come from the exhaust which entered the cabin.

- Bloomington, IL, USA

problem #3

Dec 222003

MAZDA6 4-cyl

  • Automatic transmission
  • miles
After having my 2003 Mazda 6 for no more than a week, I noticed my air conditioner was not blowing out cold air. Also, the air conditioner light shut off on any setting higher than "1". I took my vehicle into my dealer for service. I was told they would have to order a new switchboard for my dash. I waited a week for the part to come in. I was told the part may or may not be in within the next week. I became frustrated and picked up my car and asked the dealer to call me when the part came in. I waited for almost 2 months then received a letter in the mail stating my part had arrived. As I am part of the working class, I did not have a chance to respond back to the letter. I received another letter stating that if I did not make an appointment to have the part installed within 10 days, the dealer was required to send the part back to the manufacturer. I made my appointment. I was given yet another rental car. After replacing the part I waited so long to come in, I was informed that part did not fix the problem. I had to wait for another part to arrive. I was also informed that there were 3 recalls that consumers had not been informed of yet that the dealer was going to make an inspection of my vehicle to ensure the recalls were fixed. Now, right before the new years holidays, I received a call from the dealer that they have to order a new gas tank for my vehicle and the part will be ordered and should arrive "within the next couple of days". I have been promised my vehicle next week. I am not holding my breathe.

- Kyle, TX, USA

problem #2

May 072003


  • Automatic transmission
  • 13,000 miles
The engine light and transmission light indicated a problem to me, as well as the car jerking upon acceleration. After taking the car to the dealer for service it was determined that knock sensor had malfunctioned. Since the first visit to the dealership for service regarding this problem, it has happened 5 times. I have contacted my dealer and the manufacturer and am still dealing with this issue. My dealer has made no attempt to rectify the situation other than replacing the engine sensor over and over. The car was out of commision for over a week each time. I have gone to the dealer asking for their help in contacting Mazda about a new engine and or car and they are completly uncooperative.

- Elizabethtown, PA, USA

problem #1

Jun 052003


  • miles
I am experiencing problems on cold starts. The car will idle up to 2000 RPM, then idle all the way down and die. All of this will take place in about 5-6 seconds. The dealer told me that it was an aftermarket handsfree kit I had added to the car. But I purchased the car in January and had the kit added in late February, and had no problems up until a couple weeks ago (late may). The dealer unhooked the handsfree kit, because they said that the aftermarket product was the problem. After having the kit unhooked for about 2 weeks now, I still experience the problem. The kit is not even hooked into the cars wiring anywhere, it is wired onto the batter directly. The phone is not even in the kit while the car is starting, and the kit pulls no power unless the phone is in it.

- Mcgehee, AR, USA

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