Spare Tire problems of the 2002 Toyota Tundra

The spare wheel/tire fell off my 2002 Toyota Tundra as I passed over a speed bump (at a very low speed) whilst leaving an apartment complex. I was unaware of having lost the wheel but my son, who lives in the complex, saw the incident & called me - by the time he called I was on the highway driving at high speed - if the wheel had fallen off whilst I was on the highway the consequences could have been catastrophic. I submitted a report (case # 208366) to NHTSA 11/25/09 after going on line & discovering that corrosion was an issue with the frame of this vehicle & that other incidents of a similar nature had been reported & that Toyota were preparing a remedy. On 01/10/10 I contacted my local Toyota sealer & was advised to bring in the vehicle at my convenience when the spare wheel would be safely secured within the truck bed pending a permanent fix for the problem.