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definitely annoying
Crashes / Fires:
0 / 1
Injuries / Deaths:
0 / 0
Average Mileage:
40,791 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 RX-8 fuel system problems

fuel system problem

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2004 Mazda RX-8 Owner Comments

problem #9

Sep 052012


  • 145,000 miles


The contact owns a 2004 Mazda RX8. The contact was driving approximately 10 mph and smelled gasoline fuel coming from the vehicle. The contact also stated that the check engine warning light was illuminated. The vehicle was taken to the dealer for diagnostic testing. The technician advised the contact that the oil pan, throttle body assembly, fuel pump assembly, catalytic converter and spark plugs needed to be replaced. The vehicle was taken to the dealer on several occasions for the same failure. The manufacturer was made aware of the failure and advised that the vehicle was not included in any recalls. The vehicle was not repaired. The approximate failure mileage was 145,000 and the current mileage was 146,000. The VIN was unavailable.

- Campbell, CA, USA

problem #8

Jun 022010


  • 39,000 miles
Check engine light coming on after a fuel fillup go off after driven problem started late 2005 early 2006 in and out of shop cleared codes replaced fuel cap, upper intake, vacuum pump, late 2007 they cleared codes claimed to have tightened a loose cap, and stated if it came back on will need fuurther diagnoses at additional cost. I have 8 invoices ranging from programming PCM clearing codes one from 2006 printed on the invoice, customer states came back on same night seems to come on after fillup. That was when the vehicle had less than 40,000 miles. Now the fuel gauge stopped working and the check engine light is on continuously, and it wont pass state inspection. Now its been diagnosed as a fuel sending unit costing over $600 the part is ordered and I informed them that I wanted all old replaced parts.

- Imperial, MO, USA

problem #7

Apr 102010


  • 43,123 miles
2004 Mazda Rx-8, under 45K miles. Driven on a 78 degree day for 2 hour trip. Stopped to refuel and 30 min shopping. Get into car onto highway where I need my engine's speed to accelerate onto highway. I feels like half the power is gone. It reminds me of vapor lock, it's gasping for fuel or spark. This has been experienced many times before and nearly dangerous when in busy traffic, as had to pull over to birm. I know dealer replaced coil packs once or twice so far...along with plugs. This is the most dangerous car I ever owned. The most re-called car I've ever known of. Right now it's running fine, matter of fact has power to spare as compared to it's 'whimping out syndrome ". there must be a corporate solution from Mazda to me. I am ready for a lawyer.

- Portsmouth, OH, USA

problem #6

Mar 102010


  • miles


I don't even know where to begin with the problem I have had with my 2004 Mazda Rx-8. I have owned it since September 2003 and it has had countless issues, parts replaced and failures. The incident I experienced last night put me over the edge and almost cost me my life. My Rx-8, which was just at the dealer 2 weeks ago, had an engine malfunction while I was on a major highway in Massachusetts. The speed of the vehicle went from approx 50mph to 10mph in a matter of a few seconds. Luckily I was able to make my way to the breakdown lane without injuring myself or anyone else; however, this is unacceptable. Every single part in my Rx-8 has been replaced except for the engine mounts and engine. I have dished out thousands of dollars already and the vehicle only has 44,000 miles on it. Not only is this a safety hazard to those of us driving the vehicle, but it is also a safety hazard to those around us. Had the car behind me not been paying attention my vehicle could have caused a deadly car crash in the middle of rush hour on a major highway. I have contacted numerous dealerships, the BBB, and am now looking into a class action lawsuit. Mazda needs to be held accountable for their actions. Unfortunately because my car was purchased in 2003, BBB wouldn't have anything to do with the case, however I have 57 pages of detailed repairs that have been made to this vehicle since I owned it, which I am more than happy to send to you. Tons of people online have had similar issues; just from there are 30+ email addresses of individuals who have experienced problems similar to mine. Please help us get to the bottom of this faulty engine and make Mazda own up to their mistakes. People's lives are in danger and this is neither acceptable nor ethical. Ps- an employee of NHTSA has been contacted prior regarding this situation. Her name is cortney and her contact information is 1-888-327-4236 ext #: 1268. I received this from the forum.

- Andover, MA, USA

problem #5

Feb 282009


  • miles
Purchased Mazda rx 8, Feb 28,2009, gulf view auto, port richey, fl, immediately moved to upstate NY 2 days later. Gas gauge, inoperative. Federal recall, Mazda refuses to fix after recall issued due to fires.section 30120(1), failing to repair defect, can be punishable by civil fines.

- Minetto, NY, USA

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problem #4

Jul 062009


  • 35,000 miles
I want to go on file that I have a concern with the solution to a problem with our 2004 Mazda rx 8. we purchased it used from a reputable Ford dealer several months back and had an issue with starting the car. After some online research we found out the car is prone to gas flooding when not allow to run until the temperature gauge is halfway. If shut off before the engine floods with gas. I took it to cory fairbanks Mazda where the VIN was checked and that the car did have the recall 4206F already done and the only solution to the problem is to let the car warm up. My concern is the constant excessive flow of gas during start up, raw gas constantly flowing through the catalytic and the excessive heat created by these engines could cause a fire and injure all those in and around the vehicle. I have emailed Mazda also about my concerns and feel the solution is a disaster waiting to happen. Thank you.

- Oviedo, FL, USA

problem #3

May 302008


  • 105,000 miles


The 2004 RX8 has internal seals fail prematurely. This causes the engine to "blow" by a loss of compression in one of the two rotor chambers. The problem being the car with still run with half power. I continued to drive to find help off the highway. The rotor that is not working is dumping gas into the catalytic converter. By the time I parked, I could smell burning fiber and plastic and the exhaust shot out several large chunks of red hot ceramic material. The catalytic converter was bright orange and the entire underside of my car is melted. Looking on internet under "2004 rx 8 engine failure" I have seen several other stories with similar results but worse. Is it possible that the fuel tank could explode with such heat so near if you continued to drive. This happens anywhere from 12,000 miles to 100,000 miles and beyond. Mazda knows of the engine defect and has extended the warranty on the motor as of May 2008. My car is at hancock Mazda in dallas. They said damage amounted to $9,500 from heat.

- Mabank, TX, USA

problem #2

Feb 152008


  • Automatic transmission
  • miles
My Mazda Rx-8 has stalled many times while at a traffic light and while going on trips on the interstate and all of a sudden it would lose power and stalls and I would have to pull over and start it again which it would take a few minutes before it would start. I have had my Mazda towed from my house to the dealer bec it would not start and I was told that it was flooded. Now it won't start again and it is really frustrating and starting to worry me how dangerous it is driving my Mazda. I have had my Mazda for a year now and the only time I drive it is when I go on a long trip or to go shopping and mostly on weekends or after I get off from work. I would like to have this resolve so that I won't get hurt or somebody else will get hurt bec of this. I understand that Mazda Rx-8 had a recall on fuel system I just wonder if this was taken care of for this car. The dealer told me the car is fine and to make sure to warm it up before you shut the engine down, I have done that and now my Mazda will not start again.

- Lexington, NC, USA

problem #1

Jan 292006

RX-8 0-cyl

  • Automatic transmission
  • miles
I am currently in the process of trying to resolve an on-going engine startup /vehicle stall problems with my 2004 Rx-8. this car has only 15,000+ miles and has been driven for short, daily runs to work and recreational drives. The rotary engine has a required engine warm-up procedure before shutting it off. A deflooding procedure is also required if engine fails to start in the manufacturers manual. Mazda has already had a recall on the fuel system computer with update software. The car had to be towed from my garage to the dealer to have this done because of a nonstart situation. The problem seemed to be corrected by them although a stalling while a red lights or no startup after refueling at gas stations problems recurred. The car again had to be towed from my garage to the dealer to be checked for the nonstart-up issue. A replacement of battery, altenator and spark plugs were done. The problem seemingly cleared for half the day until a trip for fuel caused another nonstart incidence(stuck at the pump) in a $34,000 car! it finally restarted after 10 min and was driven back to the dealer the next afternoon where the problem then recurred in their garage. The dealer has now told me I must wait longer after the manufacturer's required engine warm-up time to shut off the car and not to restart engine in short periods of time. Is this insane or what! this explanation didn't fly with me, so the car has been now rechecked and ok'd to drive again by their technicians with no changes made. They wished me "good luck!"

- Chandler, IN, USA

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