Toyota Aristo standalone ECUs
Toyota's rear-wheel-drive Japanese-market luxury sedan, sold with the 2JZ-GTE twin-turbo straight-six; exported as the Lexus GS.
- Chassis
- S14x · JZS161
- Years
- 1993–2005
- Engines
- 2JZ-GTE non-VVTi · 2JZ-GTE VVTi
- Layout
- 6-cylinder, RWD
You have 4 plug-in ECU options for the Toyota Aristo from ECUMaster and rusEFI. The cheapest complete setup is rusEFI at US$460 including the ECU. 55 wire-in ECUs can also run its 6-cylinder engine with a custom loom, from US$275.
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 0
Built for this car. Goes where the factory ECU was and plugs straight into the factory loom.
None listed for this car.
Standalone + adapter harness 4
A general-purpose ECU with an off-the-shelf harness that joins it to the factory ECU plug.
From US$460 →
Wire-in ECU 55
Any ECU with the right features, on a new or rewired loom. Best for race cars, swaps and big changes from factory.
From US$275 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 Aristo
4 options, cheapest first. Each one links to its full specs and sellers.
Toyota Aristo JZS161 (2JZ-GTE VVT-i) 122-pin Superseal Adapter
OEM-connector to 60/26-pin Superseal adapter board for a Superseal-connector rusEFI ECU (ECU not included); Lexus GS300 S160 related but PnP not confirmed
2JZ-GTE VVTi (JZS161) and 1JZ-GTE VVTi (JZX110/JZS171) PNP For EMU Black
No auto trans or BEAN support; aimed at engine swaps
2001 LEXUS IS300 & 98-01 GS300 PNP FOR EMU BLACK
Parallel harness; OEM ECU kept for auto trans and ETCS-i throttle
JZA80 Supra and SC300 2JZ NON VVTI PNP for EMU PRO
Fits EMU PRO-8 or PRO-16; supports manual and A340 auto; Aristo harness compatibility stated
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 6 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: ECUMaster · rusEFI