The last Rosengart car, the Ariette, was introduced at the Paris Motor Show towards the end of 1951. The small car featured a two-door four seater modern body styled by Phillippe Charbonneaux which received a favourable reception on the show stand, but the body failed to distract attention from the car’s “anaemic” performance. The 747 cc engine had offered adequate power when first used by the Austin 7 in 1922, and the 21 hp (16 kW) claimed for it in the 1951 Rosengart was a higher pthan had been achieved when the company had first used the unit in 1927. A four speed gear box with synchromesh on the top two ratios and the car’s relatively light weight at 720 kg (1,587 lb) would have made the best of the available power, but the engine in the modern looking car was old and outclassed: the available power was inadequate when set against the asking price which, by 1952, was 668,500 francs. The price may have been justified by the level of the fixed costs to be amortised from the company’s large plant in Neuilly, but for a customer able to buy a standard 21 hp (16 kW) Renault 4CV for 458,000 francs (or 399,000 francs for the reduced specification Renault 4CV Service) the price of the Rosengart must have been hard to justify.

1952 saw the arrival of an Ariette break (station wagon) to replace the unsuccessful Vivor. The break was some 15 kg (33 lb) heavier than the Ariette saloon at 735 kg (1,620 lb) and offered an impressive maximum load capacity of 500 kg (1,102 lb).

Mindful of the uncompetitive price of the Ariette, early in 1953 the company (following the example set a few months earlier by the Renault 4CV Service) introduced a stripped down version called the Artisane. It shared the body shell of the Ariette but without the chrome décor or the wheel trims. The bumpers were coated only in paint and the car was available only in a dark shade of grey. Inside everything that could be removed was, including the back seat. The Artisane was priced at 599,000 francs which was a saving of more than 10% on the price of an Ariette, but by this time the market reception for the Rosengart Artisane was no longer the critical issue.