An electrical connector, comprising: a first electrical terminal having a first locking surface and a second electrical terminal having a second locking surface; a connector housing defining a first cavity and a second cavity extending along a longitudinal axis from a first face of the connector housing to a second face of the connector housing in which the first and second electrical terminals are disposed, said connector housing defining a third cavity in communication with the first and second cavities and extending along a lateral axis transverse to the longitudinal axis; and a terminal position assurance device configured to be disposed within the third cavity and moveable from a terminal insertion position to a terminal locking position, said TPA device comprising flexible first and second primary locking features configured to engage corresponding locking surfaces of the first and second electrical terminals respectively when the TPA device is in the terminal insertion position within the third cavity, said TPA device further comprising rigid first and second secondary locking features configured to engage the first and second locking surfaces of the first and second electrical terminals respectively, wherein only the first primary and first secondary locking features engage the locking surface of the first electrical terminal when the TPA device is in the terminal locking position wherein the first and second primary locking features are centered within the first and second cavities when the TPA device is in the terminal insertion position, and the first and second primary locking features engage a mesial portion of the first and second locking surfaces, and wherein the first and second secondary locking features are configured to be moved into the terminal cavities and engage a first distal portion of the first and second locking surfaces and the first and second primary locking features are configured to be moved along the lateral axis so they are offset in the first and second cavities and engage a second distal portion of the first and second locking surfaces of the first and second electrical terminals when the TPA device is moved along the lateral axis within the TPA cavity from the terminal insertion position to the terminal locking position, characterized in that only the second primary and second secondary locking features engage the locking surface of the second electrical terminal when the TPA device is in the terminal locking position. a first electrical terminal having a first locking surface and a second electrical terminal having a second locking surface; a connector housing defining a first cavity and a second cavity extending along a longitudinal axis from a first face of the connector housing to a second face of the connector housing in which the first and second electrical terminals are disposed, said connector housing defining a third cavity in communication with the first and second cavities and extending along a lateral axis transverse to the longitudinal axis; and a terminal position assurance device configured to be disposed within the third cavity and moveable from a terminal insertion position to a terminal locking position, said TPA device comprising flexible first and second primary locking features configured to engage corresponding locking surfaces of the first and second electrical terminals respectively when the TPA device is in the terminal insertion position within the third cavity, said TPA device further comprising rigid first and second secondary locking features configured to engage the first and second locking surfaces of the first and second electrical terminals respectively, wherein only the first primary and first secondary locking features engage the locking surface of the first electrical terminal when the TPA device is in the terminal locking position wherein the first and second primary locking features are centered within the first and second cavities when the TPA device is in the terminal insertion position, and the first and second primary locking features engage a mesial portion of the first and second locking surfaces, and wherein the first and second secondary locking features are configured to be moved into the terminal cavities and engage a first distal portion of the first and second locking surfaces and the first and second primary locking features are configured to be moved along the lateral axis so they are offset in the first and second cavities and engage a second distal portion of the first and second locking surfaces of the first and second electrical terminals when the TPA device is moved along the lateral axis within the TPA cavity from the terminal insertion position to the terminal locking position, characterized in that only the second primary and second secondary locking features engage the locking surface of the second electrical terminal when the TPA device is in the terminal locking position.