This is a fully functional 1990-1991 225HP Celica Alltrac GT4 3SGTE turbo Genuine Toyota ECU with part# 89661-20750. Ecu case has been opened up and verified that there are no bad capacitors inside! Be cautious when buying a used ECU if the seller does not open up the case to check for leaky capacitors because roughly 50% of these ECU's are bad. Leaky capacitors will create odd and rough running conditions as well as a no-start condition. Buy with confidence! This ECU works great! This will fit certain US spec Alltracs. Please research prior to buying. Most likely fits the 90-91 Alltracs. Typical HP of 10 is gained from the JDM ECU due to the more aggressivetuning in Japan due to higher octane of fuel.