There's only a legal requirement to fix because Toyota decided to announce a voluntary safety recall for this issue.
Would the NHTSA have gotten involved otherwise? Given the much higher domestic engine failure rates, (which presumably can occur in a similar fashion with sudden power loss), I'm assuming they would not have.
Although we don't really have the full picture. Have there been any collisions, injuries, fatalities as a result of V35A failures? If so, how many? No one really knows.
Would the NHTSA have gotten involved otherwise? Given the much higher domestic engine failure rates, (which presumably can occur in a similar fashion with sudden power loss), I'm assuming they would not have.
Although we don't really have the full picture. Have there been any collisions, injuries, fatalities as a result of V35A failures? If so, how many? No one really knows.