The body ECU on a Lexus IS250 is located under the airbag of the driver's side, along with the fuse box. Remove the LH fender apron cover (several clips). Underneath You will find the fuse boxAnd engine computer box mounted beside it. Remove the 3 10mm bolts and pull the cover on the box off. Use a pick or similar to remove the junction block mounted inside the case, once it is removed You can pull upward on the two harnesses coming into the boxAnd unplug the connectors. Once the connectors are removed, there are 2 10mm holding the ECU in place, remove them and lift it out.
Diane C
July 30, 2020
The ECU for the Lexus is250 IS in two places. The main one IS behind the passenger side dashboard, beneath the air bags. The body ECU IS located under the air bag of the driver side, along with the fuse box.
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