4UE - Air bag for driver and front seat passenger [AIB - Air bag] 4UF - Driver's and front passenger air bag with front passenger air bag deactivation [AIB - Air bag] 4UP - Driver's and front passenger air bag with knee air bag and front passenger air bag deactivation [AIB - Air bag] 4UR - Driver's and front passenger air bag with front passenger air bag deactivation [AIB - Air bag]