Mazda RX-7 standalone ECUs
Mazda's rear-wheel-drive rotary sports car; the FD3S generation used the twin-turbo 13B-REW and was sold from 1992 to 2002.
- Chassis
- Series 6 · Series 7 · Series 8
- Years
- 1992–2002
- Engines
- 13B-REW
- Layout
- rotary, RWD
You have 10 plug-in ECU options for the Mazda RX-7 from Link and Haltech, 2 of them direct plug-in. The cheapest complete setup is Link at US$1,795 including the ECU. 63 wire-in ECUs can also run its rotary engine with a custom loom, from US$155.
Prices checked and include the ECU.
Your options for this car
New to this? Three ways to fit an aftermarket ECU explains each one in five minutes.
Dedicated plug-in 2
Built for this car. Goes where the factory ECU was and plugs straight into the factory loom.
From US$1,795 →
Standalone + adapter harness 8
A general-purpose ECU with an off-the-shelf harness that joins it to the factory ECU plug.
From US$2,120 →
Wire-in ECU 63
Any ECU with the right features, on a new or rewired loom. Best for race cars, swaps and big changes from factory.
From US$155 plus loom →
Reflash
Keep the factory ECU and rewrite its tune. Usually the cheapest, keeps every factory feature, but limited to what the factory hardware can control.
Reflash options for this car are still being checked.
Plug-in ECUs for the Mazda RX-7
10 options, cheapest first. Each one links to its full specs and sellers.
RX7S6X Plug-In ECU (Mazda RX-7 Series 6)
Manual only; no sequential twin-turbo control (NA/parallel/single turbo only); E-throttle needs modification
RX7S7X Plug-In ECU (Mazda RX-7 Series 7-8)
Manual only; no sequential twin-turbo control (NA/parallel/single turbo only); E-throttle needs expansion connector
HT-150927 Elite 1500 + Mazda RX7 FD3S-S6 Plug 'n' Play Adaptor Harness Kit
Manual only; single-turbo conversion only on E1500
HT-150928 Elite 1500 + Mazda RX7 FD3S-S7&8 Plug 'n' Play Adaptor Harness Kit
Manual only; single-turbo conversion only on E1500
HT-212306 Nexus S2 Plug 'n' Play Adapter Harness Kit - Mazda RX7 FD S7 & 8
Manual only; single turbo only
HT-212307 Nexus S2 Plug 'n' Play Adapter Harness Kit - Mazda RX7 FD S6
Manual only; single turbo only
HT-151328 Elite 2500 + Mazda RX7 FD3S-S6 Plug 'n' Play Adaptor Harness Kit
Manual only; supports factory twin turbo
HT-151329 Elite 2500 + Mazda RX7 FD3S-S7&8 Plug 'n' Play Adaptor Harness Kit
Manual only; supports factory twin turbo
HT-213306 Nexus S3 Plug 'n' Play Adapter Harness Kit - Mazda RX7 FD S7 & 8
Manual only; twin or single turbo
HT-213307 Nexus S3 Plug 'n' Play Adapter Harness Kit - Mazda RX7 FD S6
Manual only; twin or single turbo
No plug-in is listed for that chassis and year. A wire-in ECU below will still fit with a custom loom.
Wire-in ECUs that can run this engine
Cheapest current unit from each brand with at least 4 injector and ignition outputs, so it runs fully sequential.
Add a loom: built by your tuner or a loom maker. Filter every wire-in ECU by features and price
Find a tuner for these ECUs
Shops with their own dyno that tune the brands above.
About the makers: Link · Haltech