Big Brother is Watching your Toyota Sienna
"The 2005 Toyota Sienna (I'm not sure about earlier models) has an Event Data Recorder (EDR) which is a black box of sorts (sans the audio recording). In the event of a crash, near crash, or airbag deployment, it records various data such as vehicle speed, engine speed, driver seat position, gear selector position, etc."
"Toyota will not disclose the data recordeded in an EDR to a third party except when:
* An agreement from the vehicle's owner (or the leasing company for a leased vehicle) is obtained
* Officially requested by the police or other authorities
* Used as a defense for Toyota in a law suit
* Ordered by the court"