Autoblog and Yahoo may earn commission from links in this article.This 2004 BMW M3 convertible pairs one of the all-time-great BMW engines, the high-revving S54 inline-six, with open-top summer usability. Finished in Titanium Silver over Grey and running the SMG gearbox, it is a driver-grade E46 M3 with recent service and a spare set of wheels included. The E46 M3 has become a modern classic, but the convertible and SMG are the more affordable end of that world, and a disclosed accident entry shapes the value.2004 BMW M3Bring a TrailerWhat it's worth right nowClassic.com shows the E46 M3 convertible with SMG averaging around $21,930, with a Market Benchmark in the low-$20,000s, and the broader convertible market topping out near $68,000 for exceptional manual cars. The transmission and body style matter here: coupes command more than convertibles, and manuals more than SMG cars, so an SMG convertible sits at the more accessible end of the E46 M3 range.AdvertisementAdvertisementMileage and history place this car in the middle of that band. At 88,000 miles it is a used driver rather than a preserved collectible, and it carries a disclosed accident entry on the Carfax, both of which keep it below the strongest examples. The recent maintenance and included second set of wheels are positives that help offset those factors.2004 BMW M3Bring a TrailerGiven the SMG convertible configuration, the mileage, and the accident history, I would call fair value roughly $16,000 to $24,000. The current $12,500 bid with three days remaining is in the early part of that range and should climb, with the recent service history supporting a mid-range result if the car inspects cleanly.Condition and detailsThe car presents as a maintained driver. The seller lists recent service including work touching the cooling system and routine maintenance, and importantly for an S54, staying ahead of the known wear items on this engine is what protects its value. The specification is appealing in Titanium Silver over Grey Nappa leather, and the sale includes a second set of wheels, which is a genuine bonus for anyone who wants dedicated summer and track or winter setups. The power soft top and the M-specific interior are all present.2004 BMW M3Bring a TrailerThe history is where a buyer should concentrate. The Carfax carries an accident entry, and on a 20-year-old M3 the details matter, so get the specifics of what was damaged, how it was repaired, and whether any structural areas were affected, along with photos and records if available. On top of that, the E46 M3 has well-known mechanical weak points that must be checked regardless of how clean a car looks: the rod bearings, the VANOS system, the rear subframe mounting points, and, on SMG cars, the SMG pump and hydraulics. None of these are dealbreakers, but all are expensive if neglected.2004 BMW M3Bring a TrailerThat makes a specialist pre-purchase inspection essential here rather than optional. Confirm whether the rod bearings have been done, check the subframe area for cracking, verify the VANOS and cooling system are healthy, and make sure the SMG system shifts correctly. Ask for the full service file to see what has already been addressed. The included second set of wheels and any recent major service should be weighed as real value, but only once the big-ticket S54 and chassis items are verified.2004 BMW M3Bring a TrailerAdvertisementAdvertisementThe offerSpecificationDetailMakeBMWModelM3 Convertible (E46)Year2004Mileage88,000Engine3.2-liter S54 inline-sixPower333 horsepower, 262 lb-ftTransmissionSix-speed SMG automated manualDrive typeRear-wheel driveExterior colorTitanium Silver MetallicInterior colorGrey Nappa leatherCurrent bidUSD $12,500Interested in this car? View the listing here.What makes the E46 M3 uniqueThe E46 M3 is widely regarded as one of the greatest M cars ever made, and the reason is largely the engine. The 3.2-liter S54 inline-six revs to 8,000 rpm, makes 333 horsepower in US trim, and delivers the kind of naturally aspirated, individual-throttle-body response that later turbocharged M cars traded away. Wrapped in the handsome, restrained E46 body, it became the benchmark sports coupe of its era, and it has since crossed firmly into modern-classic status, with the best coupes and the rare CSL and Competition variants commanding strong money.2004 BMW M3Bring a TrailerWithin that world, the convertible occupies a specific niche. It offers the same glorious S54 and much of the M3 experience with open-top usability, but it is heavier and less track-focused than the coupe, which is why the market values it below the fixed-roof cars, especially in SMG form. That makes an SMG convertible the most attainable way into a genuine E46 M3, and the value equation is simple: buy the best-maintained car you can find, because on these the condition of the engine and chassis matters far more than the badge. This car's recent service is encouraging, but the accident entry and the mandatory S54 checks are what will determine whether it is a smart buy.My takeThis is an appealing way into E46 M3 ownership, with a great engine, a summer-friendly body style, and the bonus of a second set of wheels. My fair-value call is $16,000 to $24,000, and I would be comfortable in the middle of that for a car that passes a proper inspection and whose accident repair checks out as cosmetic rather than structural.AdvertisementAdvertisementThe buying advice is all about verification. Get the details and records behind the Carfax accident entry, and commission a specialist inspection covering the rod bearings, VANOS, cooling system, rear subframe, and SMG hydraulics before you commit. Treat the recent service and spare wheels as real value once those big items are confirmed. Handle that diligence, and the current $12,500 bid is a sensible starting point on a modern-classic M3 that rewards the buyer who prioritizes condition over cosmetics.Disclaimer: This post is for informational purposes only. We are not a dealership or broker. All vehicle specifications, pricing, and availability are subject to change without notice. We are not responsible for typographical errors, omissions, or the accuracy of the provided information. Please verify all details directly with the seller.Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission.This story was originally published by Autoblog on Jul 27, 2026, where it first appeared in the Car Buying section. Add Autoblog as a Preferred Source by clicking here.
