For many performance car manufacturers, there is one style of engine that they are most closely tied to; for Porsche, it is a Flat-6, with Ferrari a V12, and for BMW, since the 1930s, that motor has been the Inline-6. As technology advanced, the engine was improved and refined with every subsequent generation, and at numerous points, an inline-6 powered nearly every car in the brand’s lineup. When people talk about the peak of BMW’s inline-6 development, the S54 developed for the E46 M3 comes up frequently. A supremely flexible engine, the S54 offers fantastic in-town usability, but when you get on it, it will rev to the stratosphere and both sound and feel like a race car while you’re doing it.

This 2005 BMW M3 Convertible is finished in Mystic Blue Metallic over Black leather and paired with a 6-speed manual transmission. Showing just 55,828 miles, this example represents one of the more desirable late-production E46 M3 convertibles, combining the purity of the S54 powerplant with open-air driving enjoyment. The body and paint present exceptionally well, with consistent gloss, clean trim, and minimal blemishes throughout. Inside, the Black leather remains soft and well-kept, with tight seat bolsters, intact stitching, and a smooth satin finish across the console and dash surfaces.

Originally produced on May 14, 2005, this M3 has a known and documented history with Enthusiast Auto Group, having been previously sold by EAG in 2013. Now returning to our inventory once again, it has received a thorough inspection and a fresh round of preventive maintenance to ensure it performs to factory standards.

Our EAG Extra Mile service includes the following work performed in preparation for sale; S54 timing chain tensioner seal, Secondary chain tensioner, VANOS valve body replacement, Power steering line replacement, Rear pinion seal, Flex disc, Michelin Pilot Sport 4S tire replacement, Oil service, coolant flush, and multi-point inspection

Mechanically, the car feels tight and balanced, with precise steering response, strong clutch engagement, and the trademark S54 power delivery that defines the E46 generation. The 6-speed manual gearbox pairs beautifully with the high-revving inline-six, providing an experience that remains one of BMW’s greatest achievements two decades later.