Toyota Celica GT-Four standalone ECUs
Toyota's all-wheel-drive turbo Celica built for rally homologation, using the 3S-GTE in the ST165, ST185 and ST205 generations.
- Chassis
- ST185 · ST205
- Years
- 1989–1999
- Engines
- 3S-GTE · 3S-GTE gen 1/2 · 3S-GTE gen 3
- Layout
- 4-cylinder, AWD
You have 6 plug-in ECU options for the Toyota Celica GT-Four from Link and ECUMaster, 2 of them direct plug-in. The cheapest complete setup is ECUMaster at US$1,238 including the ECU. 63 wire-in ECUs can also run its 4-cylinder 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$1,775 →
Standalone + adapter harness 4
A general-purpose ECU with an off-the-shelf harness that joins it to the factory ECU plug.
From US$1,238 →
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 Toyota Celica GT-Four
6 options, cheapest first. Each one links to its full specs and sellers.
TST185X Plug-In ECU (Toyota MR2 V1 & Celica ST185)
GT-Four RC / Carlos Sainz edition uses TST205X; Manual only; Link air temp sensor highly recommended; E-throttle needs modification
TST205X Plug-In ECU (Toyota MR2 V2-3 & Celica ST205)
ST185H; Manual only; does not fit original housing of non-turbo cars; E-throttle needs modification Incl. WRC/Group A Rallye edition; Manual only; does not fit original housing of non-turbo cars; E-throttle needs modification
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 · ECUMaster