One problem related to software has been reported for the 2004 Toyota RAV4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota RAV4 based on all problems reported for the 2004 RAV4.
Vehicle has a flat spot, or throttle response lag, especially noticeable when cold, and starting off in 1st gear. Suspect the ecu may need updating, with the throttle by wire system.