Back to catalog
Top issues
16 known problems · 10 high
high
Chronic underbonnet heat soak
All engines
high
High oil consumption is normal - low oil is fatal
All engines
high
Modification and abuse damage
All engines
At this odometer
See which of this car's known problems are due at that mileage, which should already have been dealt with, and what's coming up.
Before and after
Before: RX-7 FC (1985-1992)
After: RX-8 (2003-2012)
Price (AUD)
$45k-$160k+
Body styles
2-door coupe
Drivetrain
Rear-wheel drive (RWD)
Origin
Japan
Built in
Japan
Overview
The FD (chassis code FD3S) is the third and final RX-7, and arguably the purest expression of Mazda's rotary dream: a low, light, 50:50 two-seat coupe powered exclusively by the 13B-REW - the world's first mass-produced sequential twin-turbo engine. Every FD ever built used this one 1.3L twin-rotor; there is no other engine, so the 'variants' here are the series/spec levels Australians actually buy. Australia got the Series 6 officially from 1992 (around 176kW, five-speed manual only, no auto was ever sold here), the legendary Series 6 RX-7 SP homologation special in 1995 (just 35 built, ~204kW/357Nm, lightweight, for the Bathurst 12 Hour which Mazda won), and the facelifted Series 7 from 1996 to 1998 before Mazda withdrew the car from the local market. The Series 8 (1998-2002) was never sold new here but is extremely common as a Japanese grey import, which is why it falls inside the 1992-2002 span. These are now appreciating modern classics and prices are strong - but the rotary is fragile and unforgiving: apex seals, the notorious 'rat's nest' of vacuum lines controlling the sequential turbos, chronic underbonnet heat and a stock cooling system that struggles all mean a neglected FD can need a full engine rebuild ($12k-25k+) without warning. Buy on compression test and documented rebuild history, not on looks.
Engines & variants
Series 6 13B-REW (1992-1995)
Engine
1.3L twin-rotor Wankel, sequential twin-turbo
Engine code
13B-REW
Config
Twin-rotor sequential twin-turbo
Displacement
1308cc (2 x 654cc rotor)
Power
176kW @ 6500rpm (AU spec)
Torque
294Nm @ 5000rpm
Drivetrain
Rear-wheel drive (RWD)
Economy
12-16 L/100km real world (more when driven hard)
Transmission
5MT
Timing chain / belt / gear
No timing belt/chain - eccentric shaft is gear/chain driven internally; not a service item
Pros
- The original, lightest, purest FD - the enthusiast's pick
- Sequential twin-turbo gives near-seamless boost when healthy
- Sublime balance, steering and chassis - a genuine 90s icon
- Officially Australian-delivered with local compliance and history
- Strong and rising values as a modern classic
Cons
- Apex seal / rotor wear leads to expensive rebuilds, often by 120-150k km
- The 'rat's nest' of vacuum lines/solenoids degrades with heat and disrupts boost
- Stock cooling system is marginal - overheating is a real risk
- Manual only; no auto was sold in Australia
- High running costs, frequent oil top-ups, specialist-only servicing
Known problems
high
Apex seal failure / loss of compression
The rotary's apex seals wear or break, usually from oil starvation, detonation/pre-ignition or overheating. Symptoms are hard cold starting, rough idle, blue smoke and a failed/uneven compression test. A worn rotary cannot be 'patched' - it needs a full engine rebuild.
Fix: Compression test before every purchase. Rebuild with quality (often 3mm) apex seals by a rotary specialist; maintain oil level, use premix or a working oil-metering system, never lug or overheat the engine.
high
Sequential turbo 'rat's nest' vacuum/solenoid failure
The sequential twin-turbo system is controlled by 8+ vacuum solenoids and a maze of small hoses that harden, crack and leak with underbonnet heat. Leaks cause poor secondary turbo transition, boost spikes, flutter, flat spots or limp running - and dangerous overboost can hurt the engine.
Fix: Full vacuum hose ('rat's nest') replacement with silicone lines, test/replace solenoids, verify charge-control and pre-control actuators. Many owners simplify to a single-turbo conversion.
high
Overheating - marginal stock cooling
The stock radiator and cooling are barely adequate; cracked radiators, warped/perished turbo coolant hoses, a failing expansion tank or a tired thermostat let temps climb. A rotary that overheats can lose its coolant (corner) seals and apex seals.
Fix: Fit a high-capacity alloy radiator, fresh hoses, new thermostat and good fan/shroud; never run a hot rotary hard. Watch the gauge religiously.
RX-7 SP (Bathurst homologation, 1995)
Engine
1.3L twin-rotor Wankel, sequential twin-turbo (uprated SP spec)
Engine code
13B-REW
Config
Twin-rotor sequential twin-turbo
Displacement
1308cc (2 x 654cc rotor)
Power
204kW @ 6500rpm
Torque
357Nm
Drivetrain
Rear-wheel drive (RWD)
Economy
13-17 L/100km real world (track use far higher)
Transmission
5MT
Timing chain / belt / gear
No timing belt/chain - eccentric shaft is internally driven; not a service item
Pros
- Genuine Australian-built homologation special - only 35 made
- Uprated to 204kW/357Nm with a larger intercooler, bigger radiator and 120L fuel cell
- Lightweight bonnet, seats and trim - a true road-legal race car
- Holds Bathurst 12 Hour history; the most collectible Australian FD
- Improved cooling over a standard Series 6
Cons
- Extremely rare and very expensive; values well into six figures
- Same fragile rotary internals - a rebuild is just as costly
- Many have been modified or raced; provenance is everything
- Hard-driven examples can have heavily worn engines
- Parts for the unique SP-specific bits are scarce
Known problems
high
Apex seal / rotor wear (often track-stressed)
As with any 13B-REW, the apex and corner seals wear and the engine eventually needs a rebuild; SP cars were built to be raced, so many have had a harder life than standard road FDs.
Fix: Demand compression figures and documented rebuild/race history; budget for a specialist rotary rebuild.
medium
Provenance / authenticity risk
With only 35 built and high values, mis-described 'SP-spec' or replica/converted cars exist. Buying the wrong car is a five-figure mistake.
Fix: Verify build number and documentation; use a marque expert/club to authenticate before purchase.
Series 7 13B-REW (1996-1998)
Engine
1.3L twin-rotor Wankel, sequential twin-turbo (facelift)
Engine code
13B-REW
Config
Twin-rotor sequential twin-turbo
Displacement
1308cc (2 x 654cc rotor)
Power
Up to 206kW @ 6500rpm
Torque
Up to 314Nm
Drivetrain
Rear-wheel drive (RWD)
Economy
12-16 L/100km real world
Transmission
5MT
Timing chain / belt / gear
No timing belt/chain - eccentric shaft is internally driven; not a service item
Pros
- Facelifted FD with revised aero (taller rear wing) and updated interior
- Improved engine management and slightly higher output than early S6
- Last factory-delivered RX-7 in Australia
- Same brilliant chassis and balance
- Strong collector demand
Cons
- All the rotary fragility of any FD remains
- Heat-soak and vacuum-line degradation unchanged
- Manual only in Australia
- Specialist servicing essential; running costs high
- Late local cars are now 25+ years old - condition varies wildly
Known problems
high
Apex seal failure / compression loss
Identical rotary wear pattern - apex and corner seals degrade, giving hard starting, smoke and low compression that mandates a rebuild.
Fix: Compression test pre-purchase; rotary specialist rebuild; disciplined oil and cooling maintenance.
high
Vacuum/solenoid 'rat's nest' degradation
The sequential-turbo control hoses and solenoids harden and leak, upsetting the primary-to-secondary turbo transition and boost control.
Fix: Replace the full vacuum system with silicone lines and test all solenoids; some owners convert to single turbo.
medium
Carbon build-up / weak compression from short trips
Rotaries dislike cold short trips and idling; carbon deposits can cause pre-ignition and accelerate seal wear, and flooding a hot-restarted rotary is a known way to foul plugs.
Fix: Warm thoroughly before load, give regular spirited (not abusive) runs, fresh plugs, and follow correct hot-start procedure.
Series 8 13B-REW (1998-2002, grey import)
Engine
1.3L twin-rotor Wankel, sequential twin-turbo (final JDM spec)
Engine code
13B-REW
Config
Twin-rotor sequential twin-turbo
Displacement
1308cc (2 x 654cc rotor)
Power
Up to 206kW @ 6500rpm (280PS JDM)
Torque
Up to 314Nm @ 5000rpm
Drivetrain
Rear-wheel drive (RWD)
Economy
12-16 L/100km real world
Transmission
5MT, 4AT
Timing chain / belt / gear
No timing belt/chain - eccentric shaft is internally driven; not a service item
Pros
- Final and most developed FD - best electronics, ABS and cooling tweaks
- Hit the full 206kW/280PS JDM output
- Desirable trims (Type R, Type RS, Spirit R) come as imports
- Common and affordable to find via the Japanese import market
- Auto was offered in Japan (rare) for those who want it
Cons
- Never sold new in Australia - grey import, so check compliance and history
- Same fragile rotary - rebuild costs are unchanged
- Import histories can hide accident damage or tired/modified engines
- JDM speedo/odometer in km but verify genuine mileage
- Auto saps the rotary's character and is rare/hard to service
Known problems
high
Apex seal failure / engine rebuild
The same rotary wear applies, and on imports the true engine condition and history are often murky. A 'fresh' import can be one bad compression test away from a rebuild.
Fix: Independent compression test and pre-purchase inspection; treat undocumented imports with caution.
medium
Import provenance / odometer and accident history
Grey imports can carry undisclosed accident repairs, modified engines or wound-back odometers from the auction chain.
Fix: Obtain the Japanese auction sheet, verify compliance plate and import paperwork, and inspect for prior crash repair.
high
Vacuum/solenoid and heat-soak issues
Even the latest FD keeps the complex sequential-turbo vacuum control that degrades with heat and age, plus the marginal cooling.
Fix: Refresh the vacuum system and cooling; verify sequential transition on a test drive.