Is the Mesa V3 infant seat compatible with Mesa V2 base? Yes, the Mesa V3 carrier is compatible with the Mesa and Mesa V2 base. Related articles Which UPPAbaby strollers can I use with the Mesa V3? What is the difference between the Mesa and Mesa V2? Can I use the Mesa V3 without a base? Can you air travel with the Mesa V3? When should you transition from a convertible seat to the Alta?