Because Kaiser-Frazer was for all practical purposes a new company when production started in 1946 (technically it was created on the ruins of Graham-Paige), its cars had to make use of a new body design. All other automobile companies marketed facelifted pre-war designs for varying lengths of time until the 1949 model year, when virtually every model was finally re-styled. Kaisers and the more up-scale Frazers shared the same body and differed only in trim. The initial 1947 design was "modern" in that it featured fenders that flowed from headlight to taillight, something anticipated pre-war, but not in production when car manufacturing ceased early in 1942 for the war's duration.
Besides the flow-through fenders, the other main styling feature was that no hood ornament was present. This shocked some people because hood ornaments were an expected feature in those days. Eventually Kaisers and Frazers had them added, probably in an effort to please potential buyers.
Overall appearance was awkward despite the modern fender line. Kaisers and Frazers were fairly tall, so the nearly plain, slab-like sides helped emphasize their height, poor surface detailing and body panel fits. But initial sales were good because there was strong demand for almost any kind of car after the war's production curtailment was over.
By the end of the 1940s the post-war seller's market had ended and potential buyers were becoming picky about styling and engineering details. Kaiser-Frazer's styling was looking dated and other manufacturers, especially Studebaker, Ford and General Motors, were building cars that were sleeker and generally more attractive. So it was time to do something. K-F's main effort was the completely restyled 1951 Kaiser, a design that deserves to be the subject of a separate post. As for Frazer, it had been decided that the brand would be scrapped. But there were spare bodies that needed to be sold, if possible, so Frazer was given a major facelift for 1951. I'm not sure how cost-effective this was, but the result was that Frazers looked to most people like they too had been given a re-styling.
Let's take a look: