NHTSA lists 10 safety recalls and 515 owner complaints for the 2004 Mazda RX-8. Most complaints involve power train (157) and engine and engine cooling (118). The EPA rates it 18 mpg combined.
Mazda North American Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2004-2005 MPV, 2004 RX-8, and 2006-2007 Mazdaspeed6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant degradation occurring after long-term exposure to high absolute humidity, temperature and temperature cycling.
Mazda North America Operations (Mazda) is recalling certain 2003-2008 Mazda6, 2006-2007 Mazdaspeed6 and 2004 MPV vehicles nationwide. Mazda is also recalling 2005-2006 MPV vehicles in Alabama, Arizona, Arkansas, California, Delaware, the District of Columbia, Florida, Georgia, Hawaii, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maryland, Mississippi, Missouri, Nebraska, Nevada, New Jersey, New Mexico, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas, Virginia, West Virginia, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan), and the U.S. Virgin Islands. On July 9, 2019 this recall was expanded to include certain 2004-2011 RX-8 vehicles that were previously recalled under 16V-354 but have not yet been repaired. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the event of a crash necessitating deployment of the passenger frontal air bag, these passenger air bag inflators may explode due to propellant degradation occurring after long-term exposure to absolute humidity and temperature cycling.
Mazda North American Operations (Mazda) is recalling certain model year 2003-2008 Mazda6, 2004-2008 RX-8, and 2006-2007 Mazdaspeed6 vehicles. The affected vehicles are equipped with a dual-stage driver frontal air bag that may be susceptible to moisture intrusion and other factors, including manufacturing variability that, over time, could cause the inflator to rupture.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“DRIVING DOWN THE ROAD AND CAME TO A STOP LIGHT, ENGAGED THE CLUTCH HEARD A POP AND HAVEN'T BEEN ABLE TO GET INTO GEAR SINCE.I WAS IN THE MIDDLE OF TRAFFIC AND WAS NEARLY REAR ENDED CAUSE THE COUCH WOULDN'T DISENGAGE TO BUT IT IN GREAT CAUSE THE BRACKET HAD BROKEN COMPLETELY.”
“RUSTED OIL COOLER LINES AND FITTINGS ON MY RX8 DRIVEN IN OHIO WHERE ROAD SALTING IS PREVALENT IN SNOW MONTHS. FILING THIS COMPLAINT SINCE THERE IS A RECALL ISSUED FOR MY SAME MODEL YEAR IN CANADA (SPECIAL PROGRAM 76) FOR THIS EXACT ISSUE DUE TO SNOW AND SALT. MODIFIED LINES ARE AVAILABLE TO ADDRESS ISSUE BUT MAZDA IS NOT EXTENDING RECALL COVERAGE TO U.S. REPAIR COST AT DEALER ABOVE $1K. *TR”
“The electric power steering randomly pulls hard to one side while driving. There are brief spasms of forceful jerks each jerk is 1-2 seconds the series of jerks lasts 10-20 seconds and usually stops with power steering failure all while driving.”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| RX-8 Auto (S4), 2 cyl, 1.3 L · Rear-Wheel Drive | 16 | 22 | 18 | $4,300 | 494 |
| RX-8 Man 6-spd, 2 cyl, 1.3 L · Rear-Wheel Drive | 16 | 22 | 18 | $4,300 | 494 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
10 safety recalls as of Nov 11, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 515 complaints with NHTSA. The most-cited components are power train (157), engine and engine cooling (118), steering (81). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2004 Mazda RX-8 at 18 mpg combined, depending on engine and drivetrain (2 versions rated).