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Mazda RX-8 repairs by problem area

Engine (51%)

Transmission and Drivetrain (12%)

Brakes and Traction Control (2%)

Suspension and Steering (3%)

Electrical and Air Conditioning (18%)

Paint, Rust, Leaks, Rattles, and Trim (11%)

Other (3%)

Chart based on 352 repairs.

Mazda RX-8 engine repair cost distribution

$2500+ (3%)

$1000 - $2499 (19%)

$500 - $999 (24%)

$100 - $499 (44%)

< $100 (10%)

Chart based on 63 repair trips. The repair cost chart excludes repairs made under warranty, do-it-yourself repairs, and repair trips that include maintenance.
Non-members can see only ten Mazda RX-8 repair histories. Log in or join us to see them all.

2005 Mazda RX-8 4dr Coupe

238-horsepower 1.3L R2 6-speed manual RWD

20000 mi Engine making a rattling sound when accelerating. Commonly known on the RX8 forums as "marbles in a can". Not diagnosed by dealership (unable to reproduce), however I've read this is detonation or knock. Noise is obvious, but dealer couldn't hear. 
43000 mi Water pump leak...replaced under warranty. 
58000 mi

US $120
Sputtering at low RPM & rough idle. Ignition coils required replacement (coils are "weak" in this vehicle and fail prematurely). Coils purchased and replaced. Also replaced plugs & wires. Total cost for all parts roughly $350. 
68700 mi

US $400
Corroded oil cooler line cracked and developed massive oil leak. 

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2005 Mazda RX-8 4-door

2-cylinder manual 2WD

26660 mi Replaced coils. 

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2004 Mazda RX-8 4dr Coupe

238-horsepower 1.3L R2 6-speed manual RWD

33000 mi

US $125
Malfunctioning ignition coils. dealer said 'it wasn't a problem'. Malfunctioning ignition coils. dealer said 'it wasn't a problem'. replaced coils myself, issues went away. 
38150 mi CELs - Replaced intake manifold that was cracked; replaced fuel tank cap; All under warranty 
69000 mi

US $45
PCM Computer reflash/update. 
81000 mi

US $210
Heat shield fell out of exhaust system. It took out an Oxygen sensor when it did that. Needed a new 02 sensor. 
97700 mi

US $300
Replaced broken motor mount 
35000 mi Both O2 sensors failed within 1 week of each other. Replaced under warranty 

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2004 Mazda RX-8 4dr Coupe

197-horsepower 1.3L R2 4-speed shiftable automatic RWD

34000 mi

US $300
Poor engine response, especially at low rpm, followed by check engine light after a week or so. 
35000 mi

US $248
There were 2 bulletins for weak engine, reflash and diagnostics. The diagnostics turned up shorted coil (so, driving with 1 rotor). Coil replaced on out of warranty assistance, labor paid by owner. 
46000 mi

US $780
Fuel cap seal weak; engine light on, but car worked. After few days, car didn't start. Diagnostic showed P2070 and P0456. Replaced 2 intake manifold tuning valves. Replaced fuel cap on extended warranty. 
53000 mi

US $400
Weak and slight knocking at mid revs under load. Stuck valve on secondary air intake freed up, engine decarbonized with Mazda kit, slightly corroded ignition wires replaced, coils replaced, air filter replaced. 

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2004 Mazda RX-8 4-door

2-cylinder automatic 2WD

38440 mi

C $350
Flooded engine in cold weather. 

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Mazda RX-8 Engine Problems

See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how frequently Mazda RX-8 problems occur, check out our car reliability stats.