Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Mazda RX 8 Engine Failure Problem



  • janine777janine777 Posts: 1
    My first clue of impending engine failure was at about 23,000 miles when I turned on the air conditioner and hot air started pouring out of the vents. A mechanic at my local dealer mentioned that was an early warning sign of a misfire issue, which when I challenged it with the service manager, they denied.

    One day, after about 45,000 trouble free miles, my check-engine light came on. After a diagnostic, my mechanic suggested I take it to a dealer, that there was a misfire warranty issue and there might be a recall. My local dealer start to back-pedal (the ones that had first insisted I had no motor issue at 23,000 miles) so I took it to a different dealer further away. They replaced my engine promptly after running some specific required tests. They made me replace the motor mounts and clutch at my own expense, which was pricey, but the car has been fine ever since.

    One thing that happened recently was the driver's side visor cracked in two while I was driving, and was dangling dangerously in front of my face by some wires. I had no choice but to pull it free. This took out much of the security system and dashboard readings. I was alarmed at the number of reports of the same thing, and it appeared to be a safety issue, however Mazda was not recalling cars to replace these. The replacement visor was over $300. and had to be special ordered, so I ordered an identical visor from an after-market competitor for $66 and free shipping.

    The RX8 is clearly not the car the RX7 was. I had two of those, and loved them. I'm hoping this is the last of my problems.
  • tomb10tomb10 Posts: 4
    has anyone gotten over 100000 miles on their rx8 engine without any problems.My 2004 has 53000 miles on it with no engine problem except for an emissions leak problem.Thanks
  • trex8trex8 Posts: 2
    Yes. I have 118,000 and no problems! I drive the he%?* out of her every day.
    I've maintained her by the manual. I seriously red line her every day and I do rev her to 5000 RPM then pull the key. I've never done the carbon build up clean out procedure with the Mazda product or Seafoam but Im curious and may do it soon.
    check out there's a thread there specifically for 100,000 milers. One even claims 170,000. That's what I'm shooting for!
  • jacquedjacqued Posts: 1
    Same problem here..under 70, 000 miles on my 05 RX8...Dealer was useless....Mazda rejected my claim for help... I love the body of the car and the pretty interior..wonder if I could put a Honda engine in it, lolol..Sure wish I read all of this before I bought my car...People think I am nuts when I tell them, my car needs to rest for a good while before I can restart it...Cannot run errands with this car..Dealer did the carbon clean out with no results to show...Oh well...
  • raptor75raptor75 Posts: 7
    I think you have some bad information, why do you have to let your RX rest for a good while? The flooding issue is not related to the car resting. It is related to a cold engine. If you start the car and move it a few feet then shut it down you might flood it, either let it warm up a bit or rev it to 5000rpm and kill the engine while at 5000rpm. This will blow any un-burnt gas out of the engine and prevent a flooded engine. Letting your car sit will accomplish absolutely nothing.
  • Yes, revving the engine after a short trip works fine. My prob was a dealer diagnosed need for a replacement engine AFTER being 2 mos out of warranty on a known issue that Mazda does not talk about. A $6,000 problem.
  • howmanhowman Posts: 2
    Per rev to 5000. I don't. I rev to just over 3000 at warm shut down. My RX-8 had only one no start incident. But that was because I went on vacation for a week when the RX-8 battery was already low.

    I'm the original owner of a 2005 RX-8 AT that has 147,500 on the original engine. I've changed the oil at 5000 to 6000 mostly. I had a compression check at 97,000 and the Mazda tech typed into the results, "Fantastic compression, doesn't get any better than this." But the numbers were low by the chart when I checked.

    My RX-8 easily gets 21 MPG combined if I drive conversatively. I top off the tank every single day and never let the tank get below half empty. I drive 80MPH regularly, but I never drag race getting on the highway. Perfer to use 3rd with the paddle shifting nice and smooth. RX-8s are pathetic highway racers anyway, but on/off ramps can be taken at highway speeds lots of times if no one is in front of you.

    Only one set of coils and plugs have been change out at 120,000. I did the change out myself with a few wrench monkey friends. Researched and bought the parts myself for $250 total. Quite an easy job once you get the damn air filter box out of the way.

    My daily 80 mile round trip commute from Clinton MA to Boston allows a high rev or two, but never to the red line. I paddle shift alot, and cautiously downshift at low RPMS all the time to keep from lugging the engines. I don't, however, worry about doing 40MPH in 3rd and even 4th because if I use 2nd heat will build up. Heat is the number enemy of the rotary I feel. Carbon buildup can be handled by occasional revving.

    Now idle issues have been bugging me in the recent hot weather. Runnning AC on high all the times seems to be teaching the ECU to keep idle up. But I may be getting into that low compression range. I've got $4000 saved for a new engine just in case.
  • raptor75raptor75 Posts: 7
    Ouch, Mazda is a real pain to deal with on there engine replacements. A lot depends on the dealers service department and unfortunately on an industry bases Mazda's customer service is rated very poor. The fact that Mazda had extended the warranty to begin with makes them even less likely to work with you.

    The only words of advise I can give now is have your compression checked if your running towards the end of your warranty. I plan to have mine checked in the fall despite having no signs of an engine issue. This is a little late to help you though.
  • howmanhowman Posts: 2
    Just rolled,through 148,000 yesterday on my 2005 RX-8 AT.

    Had a bit trouble in the last month, though.

    Hard starting, was completely fixed with a battery replacement. Only the second battery.

    Then rough idle, and inability to run AC in the 90 degree heat wave without keeping my foot on the gas, was driving me nuts. I fell back to my old philosophy, replace the cheapest reasonable thing possible. Iridium spark plug, though not cheap, was still the most likely thing since the current plugs had 36,000 on them. And BINGO, idle held on and AC didn't lug after replacing the plugs. Took three days, to truly get the extra carbon blown out of the engine, with revs to 5700 RPM, once or twice each drive cycle.

    There's a rattle in the exhaust at idle, that sometimes turns to a cough. Maybe needs a new Cat or a muffler. The rattle is loud right out of the pipe, so I'm thinking muffler. Do Cats even rattle?

    I've go some Sears points to spend on a new set of Continental Extreme Contact DWS tires. Love these tires. They've got 40,000 and still have the DW wear marks. The midline of the tires is down to the ware bars though, because I kept the tire pressure at 32lb. I'm going to keep tire pressure at 28lb. from now on, to he'll with MPG. Although MPG, does not seem to suffer to much with the tires at 28lb.
  • kfishy76kfishy76 Posts: 1
    edited August 2013
    I have 176,000 miles and my Apex seals on rotor two just broke and trashed my engine. I never have changed plugs or coils but I believe that if I did it would still be running great to this day. It was starting to stall and die. Hard starts and the ac would blow hot sometimes.

    So keep up on the routine maintenance and drive it like you stole it once in a while. Figure spending $300 every 30-40k miles for coils and plugs from eBay but it's a good investment. It's gonna be $5500 for new engine. Hope this helps. ;)
  • its funny you say that jacqued because my rx8 does the exact same thing. it is so embarrassing not being able to start my rx8. i have to give it at least 10 or 15 mins rest sometimes if it doesn't start first time.

    People also think i'm crazy for not getting rid of my rx8 but its such a sexy car and i cant resell it unless the problem is fixed and in which case id want to keep it anyway. what a nightmare this has turned out to be!!!!!

    Can anyone imagine what its like to have just pumped gas in, hop in the car to start it and it wont go meanwhile cars are queuing up behind me.

    Its doing this much more frequently now and has become such a huge hassle. i've only had the car not even 6 months and the dealership dont want to know about it, they said to me lucky i have mechanical mechanical insurance wont cover me for new starter motor as its an "upgrade" because 2003 model have the old starter motor etc so dont fire up as quick often leading them to flood etc. does anyone know if there has been recalls for 2003 model rx8?
  • The rattle is most likely a bad CAT, RX-8s have issues with the CATs.

    It seems the most prevalent way these fail is from bad coils. The stock coils are under powered for this engine and usually fail/under-perform at around 30K. When this happens the fuel is not completely burned and enters the CAT. The CAT gets too hot and weakens or melts the CAT's core resulting in a failed CAT and often rattling. I upgrade my coils to a BHR coil set and will see how they work, so fair so good. Much better then the stock and far stronger spark.
  • There was a service bulletin back in 05/06, at that time Mazda was replacing the Starters and upgrading the battery for free (I had mine done then). At this time they are no longer doing it.
  • I have a 2010 RX8; love this car...very sexy. Issue: I took it to the dealer because it keeps poping out of 4th gear; deler says this is a common issue but the insurance won't cover the cost (1100.00) because I am 2000 over the recommenred transmission fluid change date......really? I wonder what the word "recommened really means then?" anyway; This has been an issue for a while but I thought I was just not putting it into gear all the way until it started doing it more frequently. This was primarily happening on the streets; not so much on the freeway as that's where I drive it the most.

    I was wondering of anyone else has had this issue? and if so; were you able to resolve it without a huge fight?
  • 2b2fast2b2fast Posts: 1
    edited March 2016
    2004 Rx8 grand touring 6 sp manual 6 port high power / w (empty catalytic) magnaflow mid pipe 96,000 miles   

    Do not understand the oil rant. You do know the engine has a pump that pumps oil in to the cumbustion chamber directly, right. So here is what I know, 
    1. I never use coventional oil. 
    2. You will replace the catalytic converter every 30,000 miles with the stock unit every 20,000 miles or less if aftermarket made.
    3. Loss of power at high revs is the engine destroying the catalytic converter. 
    4. My car sounds like marbles in a coffee can( that's what is left of the cat being smashed to bits)
    5. If you keep buying ceramic core catalytic converters (you will keep having to buy them. )
    6. Never had to add coolant ( have changed it due to age but never low) 96,000 miles
    7. One engine car never rebuilt. 
    8. The number one reason renesis engines fail ,is not oil viscosity ,it's oil fill level. 
    9.  The RX8 WILL NOT GO 3000 miles between oil changes. ( you mush top off the oil every 600/800 miles with about a 3/4 quart+ of oil)do the math. 
    10. Spark plugs do not last more than 25,000 miles. 
    11. Coils do not last more than 40,000 miles.  
    12.  The temps made by the renesis in the catalytic converter exceed 1850F ( I have recorded temps as high as 2456 F at full load  on a top speed run. )
    13. Do not let a rotary engine sit ( use it daily)
    14. Did I mention I only use synthetic oil. 5w20 weight
    I drive this car daily and have multiple 500 mile and 1200 mile road trips on this car and never had issues with over heating or air blowing hot. ( don't get me wrong the ac works ,but in Florida you must have dark tinted windows to be comfortable)

    the RX8 is a wonderful piece of machinery, fast ,handles like its on rails and well appointed. The down side is it requires super car levels of maintenance that the dealers cannot provide so do it yourself or risk the dealer ruining your car, and making you pay to fix it out of warranty. The only parts of my car a dealer has ever touched is replacement oem Mazda parts I ordered from them and I plan to keep it that way. 
  • Claires said:
    Here it is again :shades: : Mazda RX8 Extended Warrantythe factory warranty is 96 months or 100xxx miles witsh ever come first so no one apply for it I think we all have to stand against theme to get  better help mine just went from rooning like champ to die I tucked to the closes Mazda shop and the say front rotor and last need to be replase so I will need to buy a new motor and spend 7 k on it I just bought the care from small dilear 5 months ago so they can not help and then I call USA Mazda to get some help and they say my car is out of factory warranty I think that s not fear we all need to stand against USA Mazda to get better help because my car is just 80 k miles but we all need to raise our boisses 
  • If you own an RX8, please read this message. From time to time I've experienced many of the issues discussed here. I've had the car stall on a hill. I've had difficult starting. I have stalled at traffic lights. I've experienced rough idling. And a lack of acceleration. These things didn't happen often and occurred over a period of months. I thought it first it was bad gas. I use premium. To make a long story short, after having read comments in the RX8 club forum, I went to the dealership and had a compression test. My car went out of warranty on April 24 less than one month ago. The dealership wants me to pay $5500 for a new engine. I've contacted Mazda corporate and they're adamant that they will do nothing for me. They won't even prorate the repair. I tried to explain that I'm 97 months into the engine and for the lack of four weeks out of eight years they're punishing me. I'm on a crusade to see that every RX eight owner whose car is in warranty knows how important it is to get the compression test done while it's still in warranty and get a new engine. If you know of any other places where I can post this message to reach Mazda owners before they wind up like me, please let me know. BobSo this means we not going to get any type of help from Mazda USA I think they can do better we are alot of people whom have the same problem do you know if there is any type of legal help what we can use to get our cars fix from them our cars are new and they are expensive I love that car but they have so many recall 
  • Does some one knows if there is some legal help for rx8 owner I have same problem with mine I test the compression 9 on mine a week before and I let my car park for 4 days the temperature drops down was snowing for few days here in Washington State when stop snowing I came out to start my car and won't start the battery was dead I bought a new one I won't start with the new one neither I tuck it to the closes Mazda shop the check it and just say front and rear rotors weren't working so I need a new ingien the give the price for that 7k I call Mazda USA and they say car was out of warranty on 96 months or 100k is witch  ever come first  I am secund owner the first one bought it more than 96 months ago so what I am supposed to do with the car domp it I wish we can get help because does cars are nice but some of them just trash 
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 58,454
    So it was running well and had good compression a few weeks ago and suddenly you need a new engine? Something not adding up here. You probably want to take the car to an independent shop that knows rotary engines and can test yours. These engines flood out easily during starting for one thing.

    MODERATOR --Need help with anything? Click on my name!

    Share Your Vehicle Reviews Here

Sign In or Register to comment.