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My newly acquired 2003 rx300 shifts beautifully, except for slip/hard shift from 2nd to 3rd gear, and only under low RPM. It has no codes whatsoever. I found a dealer service bulletin for is300's from the same era with a techstream update indicated for repair. Is this something that the UpFix ecu service will likely resolve? Thank you for reading.
Topic starter
Posted : 01/12/2024 4:54 am
Thank you for reaching out. We do service that ECU. You can send it in we will take a look. If ECU is good you will get only testing fee $39.99
This post was modified 9 months ago by Serge - UpFix Team
Posted : 01/12/2024 1:02 pm