Motor Vehicle Safety Whistleblower Act - Prescribes certain whistleblower incentives and protections for motor vehicle manufacturer, part supplier, or dealership employees or contractors who voluntarily provide the Secretary of Transportation (DOT) information relating to any motor vehicle defect, noncompliance, or any violation of any notification or reporting requirement which is likely to cause unreasonable risk of death or serious physical injury.

Authorizes the Secretary to pay awards to one or more whistleblowers in an aggregate amount of up to 30% of total monetary sanctions collected pursuant to an administrative or judicial action resulting in aggregate monetary sanctions exceeding $1 million.

Prohibits an award to any whistleblower who knowingly and willfully makes false representations. Subjects such a whistleblower to criminal penalties.