So I sent Mitsu N.A. an email, suggesting strongly that the AVAS get an approved upgrade that dealers could perform, to allow louder sounds and sounds at higher speeds.
Here is their reply in its entirety:
Subject: Reply to your email sent to Mitsubishi Motors
Our Reference: Service Request Number: 1-239914674
Date Opened : 7/22/2013 02:48:12 PM
Dear Richard Son:
Thank you for your recent email to the Mitsubishi Motors Customer Relations Call Center regarding your comments and suggestions for improved audible warning systems in the Mitsubishi iMiEV.
We certainly appreciate the time taken to share your concerns regarding our vehicles and as you may be well aware, the Mitsubishi iMiEV is equipped with an Acoustic vehicle alerting system (AVAS) which activates under certain conditions alerting people who may not hear your vehicle approaching as explained on page 3-38 of the Owner’s Manual. Nevertheless, we recognize your suggestions for the types of advances that may enhance this safety feature.
You may be assured that we welcome constructive suggestions from individuals such as yourself and that careful consideration of the impressions and recommendations of the consumer plays a vital role in our efforts to improve our product mix of vehicles.
Mitsubishi Motors thanks you again for contacting our office and sharing your thoughts, and if we can be of further assistance feel free to contact a Customer Relations Representative at (888) 648-7820 Monday-Friday between 7AM-4PM Pacific Standard Time.
Customer Relations Department
Ah, customer relations. Very polite.