Texas Estates Code - EST § 115.002. Beneficiary Designation Authorized

(a) An owner of a motor vehicle may transfer the owner's interest in the motor vehicle to a sole beneficiary effective on the owner's death by designating a beneficiary as provided by Section 501.0315, Transportation Code.

(b) A beneficiary designation is:

(c) A will may not revoke or supersede a beneficiary designation, regardless of when the will is made.

(d) A designated beneficiary may disclaim the designated beneficiary's interest in the motor vehicle as provided by Chapter 240, Property Code.