Warranty, TSBs & Dealer ServiceDiscussionCommunity Starter

2006 Mazda RX-8 Sport — dealer says they can't reproduce the problem

TorqueEnthusiast74Community StarterSep 2, 20262006 Mazda RX-8 SportChicago
2006 Mazda RX-8 Sport, about 62,000 miles. I've brought the car in twice for an intermittent warning and both times the dealer says no fault found. I have video and timestamps. What's the best way to document this so there's a useful service history if it gets worse? If I fix it I'll come back and update the thread.
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27 replies

TrailDetailerCommunity StarterCommunity StarterSep 2, 2026permalink
Owner notes beat generic advice here. On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “8 sport — dealer says they can't,” that was the fork that mattered for me. When does it actually happen? If your situation is the opposite, ignore me. That's my plan before I call anyone.
QuattroGeek8Community StarterCommunity StarterSep 2, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. That's where I'd start. Learned this the expensive way on a previous car. I'll update if anything new shows up.
SmoothMom48Community StarterCommunity StarterSep 2, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2006 Mazda RX-8, a specialist hour can be cheaper than another round of parts. Then you'll know the next fork. This is from a 2006 Mazda RX-8 in Chicago with 62,000 miles. Was this after sitting overnight? A day of patience here is cheaper than a wrong part. I'm keeping receipts and dates in one folder.
V8MechanicishCommunity StarterCommunity StarterSep 3, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. That's where I'd start. Stop there until you know. Worth doing even if the car feels fine right now. I'll update if anything new shows up.
QuattroGeek8Community StarterCommunity StarterSep 3, 2026permalink
Write down what you already tried. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. That's where I'd start. Learned this the expensive way on a previous car. This is the version I'd tell a friend.
ShiftGuyCommunity StarterCommunity StarterSep 3, 2026permalink
Owner notes beat generic advice here. On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “8 sport — dealer says they can't,” that was the fork that mattered for me. That's the whole play. This is the filter I use when the thread starts repeating itself. Wrote this up on my lunch break.
TruckOwner47Community StarterCommunity StarterSep 3, 2026permalink
Write down what you already tried. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. I'd do that before spending real money. Time, temperature, and whether it's in gear are the notes that actually help a shop. If this is nothing, great. I want that in data.
PistonBuilderCommunity StarterCommunity StarterSep 4, 2026permalink
Fair point. Counterpoint: Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. I'd do that before spending real money. Verbal 'we'll take care of it' is not a plan. I'll update if anything new shows up.
V8MechanicishCommunity StarterCommunity StarterSep 4, 2026permalink
Quick add on that: On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. I'd do that before spending real money. On “8 sport — dealer says they can't,” that was the fork that mattered for me. Stop there until you know. I'd rather look cautious in this thread than stuck later.
QuattroGeek8Community StarterCommunity StarterSep 3, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2006 Mazda RX-8, a specialist hour can be cheaper than another round of parts. I'd do that before spending real money. This is from a 2006 Mazda RX-8 in Chicago with 62,000 miles. Learned this the expensive way on a previous car. If the story changes I'll post the new data.
CityEnthusiast92Community StarterCommunity StarterSep 3, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. That's where I'd start. Parts cannon is a personality type I try to avoid. Doing the boring step first on purpose.
PistonBuilderCommunity StarterCommunity StarterSep 3, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2006 Mazda RX-8, a specialist hour can be cheaper than another round of parts. I'd do that before spending real money. Verbal 'we'll take care of it' is not a plan. That's coming from doing this as an owner, not a shop. I'm keeping receipts and dates in one folder.
TorqueEnthusiast74Community StarterCommunity StarterSep 4, 2026permalink
Useful. I'll report back after I verify that on my 2006 Mazda RX-8. I'm keeping receipts and dates in one folder.
ShiftGuyCommunity StarterCommunity StarterSep 3, 2026permalink
Owner notes beat generic advice here. On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “8 sport — dealer says they can't,” that was the fork that mattered for me. Stop there until you know. That's my plan before I call anyone.
TorqueEnthusiast74Community StarterCommunity StarterSep 3, 2026permalink
I parked the 2006 Mazda RX-8 and wrote down what I already tested so I'm not repeating myself. This is the version I'd tell a friend.
TruckOwner47Community StarterCommunity StarterSep 3, 2026permalink
Owner notes beat generic advice here. On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. Then you'll know the next fork. On “8 sport — dealer says they can't,” that was the fork that mattered for me. Time, temperature, and whether it's in gear are the notes that actually help a shop. I'd rather look cautious in this thread than stuck later.
PixelHauler42Community StarterCommunity StarterSep 4, 2026permalink
I hear you, though I'd still want a second check. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. Then you'll know the next fork. Happy to compare notes if your setup is different. Not trying to scare you — just skip the expensive first guess. Might be overthinking it, but I'd rather overthink than overspend.
BoostedRoadie62Community StarterCommunity StarterSep 3, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. I'd do that before spending real money. If you share a photo of the worksheet, easier to sanity-check. Doing the boring step first on purpose.
QuattroGeek8Community StarterCommunity StarterSep 3, 2026permalink
I'd keep this practical. Verify the cheap/easy branch on the 2006 Mazda RX-8 before a big repair or a big spend. Then you'll know the next fork. Learned this the expensive way on a previous car. I'll update if anything new shows up.
PistonBuilderCommunity StarterCommunity StarterSep 3, 2026permalink
Write down what you already tried. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. I'd do that before spending real money. I'd want that in writing, not as a promise. Might be overthinking it, but I'd rather overthink than overspend.
TorqueEnthusiast74Community StarterCommunity StarterSep 3, 2026permalink
Useful. I'll report back after I verify that on my 2006 Mazda RX-8. This is me being the wet blanket on purpose.
QuattroGeek8Community StarterCommunity StarterSep 3, 2026permalink
Write down what you already tried. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. That's where I'd start. A shop burned me once by skipping that step. Not trying to scare you — just skip the expensive first guess. This is the version I'd tell a friend.
ShiftGuyCommunity StarterCommunity StarterSep 3, 2026permalink
Don't overfit one forum story to your car. If it still isn't clear on the 2006 Mazda RX-8, a specialist hour can be cheaper than another round of parts. Then you'll know the next fork. Do that first. I'm keeping receipts and dates in one folder.
TorqueEnthusiast74Community StarterCommunity StarterSep 4, 2026permalink
Thanks — that narrowed it. I'm going to try the simpler check on the 2006 Mazda RX-8 first. If the story changes I'll post the new data.
CityEnthusiast92Community StarterCommunity StarterSep 4, 2026permalink
Owner notes beat generic advice here. On the 2006 Mazda RX-8 in Chicago, I'd fix the thing you'll notice every day before chasing spec-sheet extras. I'd do that before spending real money. On “8 sport — dealer says they can't,” that was the fork that mattered for me. The universe charges extra for guessing. Wrote this up on my lunch break.
PistonBuilderCommunity StarterCommunity StarterSep 4, 2026permalink
Write down what you already tried. A second data point from another 2006 Mazda RX-8 owner helps more than a generic diagnosis. I'd do that before spending real money. This is from a 2006 Mazda RX-8 in Chicago with 62,000 miles. I'd want that in writing, not as a promise. I'd sleep better after that step, even if it finds nothing. If this is nothing, great. I want that in data.
TorqueEnthusiast74Community StarterCommunity StarterSep 4, 2026permalink
Thanks — that narrowed it. I'm going to try the simpler check on the 2006 Mazda RX-8 first. Doing the boring step first on purpose.
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